File: [local] / src / usr.sbin / user / user.c (download)
Revision 1.131, Thu May 18 18:29:28 2023 UTC (12 months, 3 weeks ago) by millert
Branch: MAIN
CVS Tags: OPENBSD_7_5_BASE, OPENBSD_7_5, OPENBSD_7_4_BASE, OPENBSD_7_4, HEAD
Changes since 1.130: +101 -31 lines
user: handle paths with whitespace / metacharacters
Use execv(3) instead of system(3) to run external commands.
This avoids problems with whitespace and shell metacharacters
in path names. OK op@
|
/* $OpenBSD: user.c,v 1.131 2023/05/18 18:29:28 millert Exp $ */
/* $NetBSD: user.c,v 1.69 2003/04/14 17:40:07 agc Exp $ */
/*
* Copyright (c) 1999 Alistair G. Crooks. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote
* products derived from this software without specific prior written
* permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
* GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/wait.h>
#include <ctype.h>
#include <dirent.h>
#include <err.h>
#include <errno.h>
#include <fcntl.h>
#include <grp.h>
#include <limits.h>
#include <login_cap.h>
#include <paths.h>
#include <pwd.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <syslog.h>
#include <time.h>
#include <unistd.h>
#include <util.h>
#include "usermgmt.h"
/* this struct describes a uid range */
typedef struct range_t {
uid_t r_from; /* low uid */
uid_t r_to; /* high uid */
} range_t;
/* this struct encapsulates the user information */
typedef struct user_t {
int u_flags; /* see below */
uid_t u_uid; /* uid of user */
char *u_password; /* encrypted password */
char *u_comment; /* comment field */
char *u_home; /* home directory */
char *u_primgrp; /* primary group */
int u_groupc; /* # of secondary groups */
const char *u_groupv[NGROUPS_MAX]; /* secondary groups */
char *u_shell; /* user's shell */
char *u_basedir; /* base directory for home */
char *u_expire; /* when account will expire */
char *u_inactive; /* when password will expire */
char *u_skeldir; /* directory for startup files */
char *u_class; /* login class */
unsigned int u_rsize; /* size of range array */
unsigned int u_rc; /* # of ranges */
range_t *u_rv; /* the ranges */
unsigned int u_defrc; /* # of ranges in defaults */
int u_preserve; /* preserve uids on deletion */
} user_t;
/* flags for which fields of the user_t replace the passwd entry */
enum {
F_COMMENT = 0x0001,
F_DUPUID = 0x0002,
F_EXPIRE = 0x0004,
F_GROUP = 0x0008,
F_HOMEDIR = 0x0010,
F_MKDIR = 0x0020,
F_INACTIVE = 0x0040,
F_PASSWORD = 0x0080,
F_SECGROUP = 0x0100,
F_SHELL = 0x0200,
F_UID = 0x0400,
F_USERNAME = 0x0800,
F_CLASS = 0x1000,
F_SETSECGROUP = 0x4000,
F_ACCTLOCK = 0x8000,
F_ACCTUNLOCK = 0x10000
};
/* flags for runas() */
enum {
RUNAS_DUP_DEVNULL = 0x01,
RUNAS_IGNORE_EXITVAL = 0x02
};
#define CONFFILE "/etc/usermgmt.conf"
#define _PATH_NONEXISTENT "/nonexistent"
#ifndef DEF_GROUP
#define DEF_GROUP "=uid"
#endif
#ifndef DEF_BASEDIR
#define DEF_BASEDIR "/home"
#endif
#ifndef DEF_SKELDIR
#define DEF_SKELDIR "/etc/skel"
#endif
#ifndef DEF_SHELL
#define DEF_SHELL _PATH_KSHELL
#endif
#ifndef DEF_COMMENT
#define DEF_COMMENT ""
#endif
#ifndef DEF_LOWUID
#define DEF_LOWUID 1000
#endif
#ifndef DEF_HIGHUID
#define DEF_HIGHUID 60000
#endif
#ifndef DEF_INACTIVE
#define DEF_INACTIVE 0
#endif
#ifndef DEF_EXPIRE
#define DEF_EXPIRE NULL
#endif
#ifndef DEF_CLASS
#define DEF_CLASS ""
#endif
#ifndef WAITSECS
#define WAITSECS 10
#endif
#ifndef NOBODY_UID
#define NOBODY_UID 32767
#endif
/* some useful constants */
enum {
MaxShellNameLen = 256,
MaxFileNameLen = PATH_MAX,
MaxUserNameLen = _PW_NAME_LEN,
MaxCommandLen = 2048,
PasswordLength = _PASSWORD_LEN,
LowGid = DEF_LOWUID,
HighGid = DEF_HIGHUID
};
/* Full paths of programs used here */
#define CHMOD "/bin/chmod"
#define CHOWN "/sbin/chown"
#define MKDIR "/bin/mkdir"
#define MV "/bin/mv"
#define NOLOGIN "/sbin/nologin"
#define CP "/bin/cp"
#define RM "/bin/rm"
#define UNSET_INACTIVE "Null (unset)"
#define UNSET_EXPIRY "Null (unset)"
static int adduser(char *, user_t *);
static int append_group(char *, int, const char **);
static int copydotfiles(char *, char *);
static int creategid(char *, gid_t, const char *);
static int getnextgid(uid_t *, uid_t, uid_t);
static int getnextuid(int, uid_t *, uid_t, uid_t);
static int is_local(char *, const char *);
static int modify_gid(char *, char *);
static int moduser(char *, char *, user_t *);
static int removehomedir(const char *, uid_t, const char *);
static int rm_user_from_groups(char *);
static int save_range(user_t *, char *);
static int scantime(time_t *, char *);
static int setdefaults(user_t *);
static int valid_class(char *);
static int valid_group(char *);
static int valid_login(char *);
static size_t expand_len(const char *, const char *);
static struct group *find_group_info(const char *);
static struct passwd *find_user_info(const char *);
static void checkeuid(void);
static void strsave(char **, const char *);
static void read_defaults(user_t *);
static int verbose;
/* free *cpp, then store a copy of `s' in it */
static void
strsave(char **cpp, const char *s)
{
free(*cpp);
if ((*cpp = strdup(s)) == NULL)
err(1, NULL);
}
/* run the given command with optional arguments as the specified uid */
static int
runas(const char *path, const char *const argv[], uid_t uid, int flags)
{
int argc, status, ret = 0;
char buf[MaxCommandLen];
pid_t child;
strlcpy(buf, path, sizeof(buf));
for (argc = 1; argv[argc] != NULL; argc++) {
strlcat(buf, " ", sizeof(buf));
strlcat(buf, argv[argc], sizeof(buf));
}
if (verbose)
printf("Command: %s\n", buf);
child = fork();
switch (child) {
case -1:
err(EXIT_FAILURE, "fork");
case 0:
if (flags & RUNAS_DUP_DEVNULL) {
/* Redirect output to /dev/null if possible. */
int dev_null = open(_PATH_DEVNULL, O_RDWR);
if (dev_null != -1) {
dup2(dev_null, STDOUT_FILENO);
dup2(dev_null, STDERR_FILENO);
if (dev_null > STDERR_FILENO)
close(dev_null);
} else {
warn("%s", _PATH_DEVNULL);
}
}
if (uid != -1) {
if (setresuid(uid, uid, uid) == -1)
warn("setresuid(%u, %u, %u)", uid, uid, uid);
}
execv(path, (char **)argv);
warn("%s", buf);
_exit(EXIT_FAILURE);
default:
while (waitpid(child, &status, 0) == -1) {
if (errno != EINTR)
err(EXIT_FAILURE, "waitpid");
}
if (WIFSIGNALED(status)) {
ret = WTERMSIG(status);
warnx("[Warning] `%s' killed by signal %d", buf, ret);
ret |= 128;
} else {
if (!(flags & RUNAS_IGNORE_EXITVAL))
ret = WEXITSTATUS(status);
if (ret != 0) {
warnx("[Warning] `%s' failed with status %d",
buf, ret);
}
}
return ret;
}
}
/* run the given command with optional arguments */
static int
run(const char *path, const char *const argv[])
{
return runas(path, argv, -1, 0);
}
/* remove a users home directory, returning 1 for success (ie, no problems encountered) */
static int
removehomedir(const char *user, uid_t uid, const char *dir)
{
const char *rm_argv[] = { "rm", "-rf", dir, NULL };
struct stat st;
/* userid not root? */
if (uid == 0) {
warnx("Not deleting home directory `%s'; userid is 0", dir);
return 0;
}
/* directory exists (and is a directory!) */
if (stat(dir, &st) == -1) {
warnx("Home directory `%s' doesn't exist", dir);
return 0;
}
if (!S_ISDIR(st.st_mode)) {
warnx("Home directory `%s' is not a directory", dir);
return 0;
}
/* userid matches directory owner? */
if (st.st_uid != uid) {
warnx("User `%s' doesn't own directory `%s', not removed",
user, dir);
return 0;
}
/* run "rm -rf dir 2>&1/dev/null" as user, not root */
(void) runas(RM, rm_argv, uid, RUNAS_DUP_DEVNULL|RUNAS_IGNORE_EXITVAL);
if (rmdir(dir) == -1 && errno != ENOENT) {
warnx("Unable to remove all files in `%s'", dir);
return 0;
}
return 1;
}
/*
* check that the effective uid is 0 - called from funcs which will
* modify data and config files.
*/
static void
checkeuid(void)
{
if (geteuid() != 0) {
errx(EXIT_FAILURE, "Program must be run as root");
}
}
/* copy any dot files into the user's home directory */
static int
copydotfiles(char *skeldir, char *dst)
{
char src[MaxFileNameLen];
struct dirent *dp;
DIR *dirp;
int len, n;
if (*skeldir == '\0')
return 0;
if ((dirp = opendir(skeldir)) == NULL) {
warn("can't open source . files dir `%s'", skeldir);
return 0;
}
for (n = 0; (dp = readdir(dirp)) != NULL && n == 0 ; ) {
if (strcmp(dp->d_name, ".") == 0 ||
strcmp(dp->d_name, "..") == 0) {
continue;
}
n = 1;
}
(void) closedir(dirp);
if (n == 0) {
warnx("No \"dot\" initialisation files found");
} else {
len = snprintf(src, sizeof(src), "%s/.", skeldir);
if (len < 0 || len >= sizeof(src)) {
warnx("skeleton directory `%s' too long", skeldir);
n = 0;
} else {
const char *cp_argv[] = { "cp", "-a", src, dst, NULL };
if (verbose)
cp_argv[1] = "-av";
run(CP, cp_argv);
}
}
return n;
}
/* returns 1 if the specified gid exists in the group file, else 0 */
static int
gid_exists(gid_t gid)
{
return group_from_gid(gid, 1) != NULL;
}
/* return 1 if the specified group exists in the group file, else 0 */
static int
group_exists(const char *group)
{
gid_t gid;
return gid_from_group(group, &gid) != -1;
}
/* create a group entry with gid `gid' */
static int
creategid(char *group, gid_t gid, const char *name)
{
struct stat st;
FILE *from;
FILE *to;
char *buf;
char f[MaxFileNameLen];
int fd, ret;
int wroteit = 0;
size_t len;
if (group_exists(group)) {
warnx("group `%s' already exists", group);
return 0;
}
if ((from = fopen(_PATH_GROUP, "r")) == NULL) {
warn("can't create gid for `%s': can't open `%s'", group,
_PATH_GROUP);
return 0;
}
if (flock(fileno(from), LOCK_EX | LOCK_NB) == -1) {
warn("can't lock `%s'", _PATH_GROUP);
}
(void) fstat(fileno(from), &st);
(void) snprintf(f, sizeof(f), "%s.XXXXXXXX", _PATH_GROUP);
if ((fd = mkstemp(f)) == -1) {
warn("can't create gid: mkstemp failed");
fclose(from);
return 0;
}
if ((to = fdopen(fd, "w")) == NULL) {
warn("can't create gid: fdopen `%s' failed", f);
fclose(from);
close(fd);
unlink(f);
return 0;
}
while ((buf = fgetln(from, &len)) != NULL && len > 0) {
ret = 0;
if (buf[0] == '+' && wroteit == 0) {
ret = fprintf(to, "%s:*:%u:%s\n", group, gid, name);
wroteit = 1;
}
if (ret == -1 ||
fprintf(to, "%*.*s", (int)len, (int)len, buf) != len) {
warn("can't create gid: short write to `%s'", f);
fclose(from);
fclose(to);
unlink(f);
return 0;
}
}
ret = 0;
if (wroteit == 0)
ret = fprintf(to, "%s:*:%u:%s\n", group, gid, name);
fclose(from);
if (fclose(to) == EOF || ret == -1) {
warn("can't create gid: short write to `%s'", f);
unlink(f);
return 0;
}
if (rename(f, _PATH_GROUP) == -1) {
warn("can't create gid: can't rename `%s' to `%s'", f,
_PATH_GROUP);
unlink(f);
return 0;
}
(void) chmod(_PATH_GROUP, st.st_mode & 0777);
syslog(LOG_INFO, "new group added: name=%s, gid=%u", group, gid);
return 1;
}
/* modify the group entry with name `group' to be newent */
static int
modify_gid(char *group, char *newent)
{
struct stat st;
FILE *from;
FILE *to;
char buf[LINE_MAX];
char f[MaxFileNameLen];
char *colon;
int groupc;
int entc;
int fd;
int cc;
if ((from = fopen(_PATH_GROUP, "r")) == NULL) {
warn("can't modify gid for `%s': can't open `%s'", group,
_PATH_GROUP);
return 0;
}
if (flock(fileno(from), LOCK_EX | LOCK_NB) == -1) {
warn("can't lock `%s'", _PATH_GROUP);
}
(void) fstat(fileno(from), &st);
(void) snprintf(f, sizeof(f), "%s.XXXXXXXX", _PATH_GROUP);
if ((fd = mkstemp(f)) == -1) {
warn("can't modify gid: mkstemp failed");
fclose(from);
return 0;
}
if ((to = fdopen(fd, "w")) == NULL) {
warn("can't modify gid: fdopen `%s' failed", f);
fclose(from);
close(fd);
unlink(f);
return 0;
}
groupc = strlen(group);
while (fgets(buf, sizeof(buf), from) != NULL) {
cc = strlen(buf);
if (cc > 0 && buf[cc - 1] != '\n' && !feof(from)) {
while (fgetc(from) != '\n' && !feof(from))
cc++;
warnx("%s: line `%s' too long (%d bytes), skipping",
_PATH_GROUP, buf, cc);
continue;
}
if ((colon = strchr(buf, ':')) == NULL) {
/*
* The only valid entry with no column is the all-YP
* line.
*/
if (strcmp(buf, "+\n") != 0) {
warnx("badly formed entry `%.*s'", cc - 1, buf);
continue;
}
} else {
entc = (int)(colon - buf);
if (entc == groupc && strncmp(group, buf, entc) == 0) {
if (newent == NULL) {
continue;
} else {
cc = strlcpy(buf, newent, sizeof(buf));
if (cc >= sizeof(buf)) {
warnx("group `%s' entry too long",
newent);
fclose(from);
fclose(to);
unlink(f);
return (0);
}
}
}
}
if (fwrite(buf, cc, 1, to) != 1) {
warn("can't modify gid: short write to `%s'", f);
fclose(from);
fclose(to);
unlink(f);
return 0;
}
}
fclose(from);
if (fclose(to) == EOF) {
warn("can't modify gid: short write to `%s'", f);
unlink(f);
return 0;
}
if (rename(f, _PATH_GROUP) == -1) {
warn("can't modify gid: can't rename `%s' to `%s'", f, _PATH_GROUP);
unlink(f);
return 0;
}
(void) chmod(_PATH_GROUP, st.st_mode & 0777);
if (newent == NULL) {
syslog(LOG_INFO, "group deleted: name=%s", group);
} else {
syslog(LOG_INFO, "group information modified: name=%s", group);
}
return 1;
}
/* modify the group entries for all `groups', by adding `user' */
static int
append_group(char *user, int ngroups, const char **groups)
{
struct group *grp;
struct passwd *pwp;
struct stat st;
FILE *from;
FILE *to;
char buf[LINE_MAX];
char f[MaxFileNameLen];
char *colon;
const char *ugid = NULL;
int fd;
int cc;
int i;
int j;
if ((pwp = getpwnam(user))) {
if ((ugid = group_from_gid(pwp->pw_gid, 1)) == NULL) {
warnx("can't get primary group for user `%s'", user);
return 0;
}
}
for (i = 0 ; i < ngroups ; i++) {
if ((grp = getgrnam(groups[i])) == NULL) {
warnx("can't append group `%s' for user `%s'",
groups[i], user);
} else {
for (j = 0 ; grp->gr_mem[j] ; j++) {
if (strcmp(user, grp->gr_mem[j]) == 0) {
/* already in it */
groups[i] = "";
}
}
}
}
if ((from = fopen(_PATH_GROUP, "r")) == NULL) {
warn("can't append group for `%s': can't open `%s'", user,
_PATH_GROUP);
return 0;
}
if (flock(fileno(from), LOCK_EX | LOCK_NB) == -1) {
warn("can't lock `%s'", _PATH_GROUP);
}
(void) fstat(fileno(from), &st);
(void) snprintf(f, sizeof(f), "%s.XXXXXXXX", _PATH_GROUP);
if ((fd = mkstemp(f)) == -1) {
warn("can't append group: mkstemp failed");
fclose(from);
return 0;
}
if ((to = fdopen(fd, "w")) == NULL) {
warn("can't append group: fdopen `%s' failed", f);
fclose(from);
close(fd);
unlink(f);
return 0;
}
while (fgets(buf, sizeof(buf), from) != NULL) {
cc = strlen(buf);
if (cc > 0 && buf[cc - 1] != '\n' && !feof(from)) {
while (fgetc(from) != '\n' && !feof(from))
cc++;
warnx("%s: line `%s' too long (%d bytes), skipping",
_PATH_GROUP, buf, cc);
continue;
}
if ((colon = strchr(buf, ':')) == NULL) {
warnx("badly formed entry `%s'", buf);
continue;
}
for (i = 0 ; i < ngroups ; i++) {
j = (int)(colon - buf);
if (ugid) {
if (strcmp(ugid, groups[i]) == 0) {
/* user's primary group, no need to append */
groups[i] = "";
}
}
if (strncmp(groups[i], buf, j) == 0 &&
groups[i][j] == '\0') {
while (isspace((unsigned char)buf[cc - 1]))
cc--;
buf[(j = cc)] = '\0';
if (buf[strlen(buf) - 1] != ':')
strlcat(buf, ",", sizeof(buf));
cc = strlcat(buf, user, sizeof(buf)) + 1;
if (cc >= sizeof(buf)) {
warnx("Warning: group `%s' would "
"become too long, not modifying",
groups[i]);
cc = j + 1;
}
buf[cc - 1] = '\n';
buf[cc] = '\0';
}
}
if (fwrite(buf, cc, 1, to) != 1) {
warn("can't append group: short write to `%s'", f);
fclose(from);
fclose(to);
unlink(f);
return 0;
}
}
fclose(from);
if (fclose(to) == EOF) {
warn("can't append group: short write to `%s'", f);
unlink(f);
return 0;
}
if (rename(f, _PATH_GROUP) == -1) {
warn("can't append group: can't rename `%s' to `%s'", f, _PATH_GROUP);
unlink(f);
return 0;
}
(void) chmod(_PATH_GROUP, st.st_mode & 0777);
return 1;
}
/* return 1 if `login' is a valid login name */
static int
valid_login(char *login_name)
{
unsigned char *cp;
/* The first character cannot be a hyphen */
if (*login_name == '-')
return 0;
for (cp = login_name ; *cp ; cp++) {
/* We allow '$' as the last character for samba */
if (!isalnum((unsigned char)*cp) && *cp != '.' &&
*cp != '_' && *cp != '-' &&
!(*cp == '$' && *(cp + 1) == '\0')) {
return 0;
}
}
if ((char *)cp - login_name > MaxUserNameLen)
return 0;
return 1;
}
/* return 1 if `group' is a valid group name */
static int
valid_group(char *group)
{
unsigned char *cp;
for (cp = group ; *cp ; cp++) {
if (!isalnum((unsigned char)*cp) && *cp != '.' &&
*cp != '_' && *cp != '-') {
return 0;
}
}
if ((char *)cp - group > MaxUserNameLen)
return 0;
return 1;
}
/* return 1 if `class' exists */
static int
valid_class(char *class)
{
login_cap_t *lc;
if ((lc = login_getclass(class)) != NULL)
login_close(lc);
return lc != NULL;
}
/* find the next gid in the range lo .. hi */
static int
getnextgid(uid_t *gidp, uid_t lo, uid_t hi)
{
for (*gidp = lo ; *gidp < hi ; *gidp += 1) {
if (!gid_exists((gid_t)*gidp)) {
return 1;
}
}
return 0;
}
/* save a range of uids */
static int
save_range(user_t *up, char *cp)
{
uid_t from;
uid_t to;
int i;
if (up->u_rc == up->u_rsize) {
up->u_rsize *= 2;
if ((up->u_rv = reallocarray(up->u_rv, up->u_rsize,
sizeof(range_t))) == NULL) {
warn(NULL);
return 0;
}
}
if (up->u_rv && sscanf(cp, "%u..%u", &from, &to) == 2) {
for (i = up->u_defrc ; i < up->u_rc ; i++) {
if (up->u_rv[i].r_from == from && up->u_rv[i].r_to == to) {
break;
}
}
if (i == up->u_rc) {
up->u_rv[up->u_rc].r_from = from;
up->u_rv[up->u_rc].r_to = to;
up->u_rc += 1;
}
} else {
warnx("Bad uid range `%s'", cp);
return 0;
}
return 1;
}
/* set the defaults in the defaults file */
static int
setdefaults(user_t *up)
{
char template[MaxFileNameLen];
FILE *fp;
int ret;
int fd;
int i;
(void) snprintf(template, sizeof(template), "%s.XXXXXXXX", CONFFILE);
if ((fd = mkstemp(template)) == -1) {
warnx("can't mkstemp `%s' for writing", CONFFILE);
return 0;
}
if ((fp = fdopen(fd, "w")) == NULL) {
warn("can't fdopen `%s' for writing", CONFFILE);
return 0;
}
ret = 1;
if (fprintf(fp, "group\t\t%s\n", up->u_primgrp) <= 0 ||
fprintf(fp, "base_dir\t%s\n", up->u_basedir) <= 0 ||
fprintf(fp, "skel_dir\t%s\n", up->u_skeldir) <= 0 ||
fprintf(fp, "shell\t\t%s\n", up->u_shell) <= 0 ||
fprintf(fp, "class\t\t%s\n", up->u_class) <= 0 ||
fprintf(fp, "inactive\t%s\n", (up->u_inactive == NULL) ? UNSET_INACTIVE : up->u_inactive) <= 0 ||
fprintf(fp, "expire\t\t%s\n", (up->u_expire == NULL) ? UNSET_EXPIRY : up->u_expire) <= 0 ||
fprintf(fp, "preserve\t%s\n", (up->u_preserve == 0) ? "false" : "true") <= 0) {
warn("can't write to `%s'", CONFFILE);
ret = 0;
}
for (i = (up->u_defrc != up->u_rc) ? up->u_defrc : 0 ; i < up->u_rc ; i++) {
if (fprintf(fp, "range\t\t%u..%u\n", up->u_rv[i].r_from, up->u_rv[i].r_to) <= 0) {
warn("can't write to `%s'", CONFFILE);
ret = 0;
}
}
if (fclose(fp) == EOF) {
warn("can't write to `%s'", CONFFILE);
ret = 0;
}
if (ret) {
ret = ((rename(template, CONFFILE) == 0) && (chmod(CONFFILE, 0644) == 0));
}
return ret;
}
/* read the defaults file */
static void
read_defaults(user_t *up)
{
struct stat st;
size_t lineno;
size_t len;
FILE *fp;
unsigned char *cp;
unsigned char *s;
strsave(&up->u_primgrp, DEF_GROUP);
strsave(&up->u_basedir, DEF_BASEDIR);
strsave(&up->u_skeldir, DEF_SKELDIR);
strsave(&up->u_shell, DEF_SHELL);
strsave(&up->u_comment, DEF_COMMENT);
strsave(&up->u_class, DEF_CLASS);
up->u_rsize = 16;
up->u_defrc = 0;
if ((up->u_rv = calloc(up->u_rsize, sizeof(range_t))) == NULL)
err(1, NULL);
up->u_inactive = DEF_INACTIVE;
up->u_expire = DEF_EXPIRE;
if ((fp = fopen(CONFFILE, "r")) == NULL) {
if (stat(CONFFILE, &st) == -1 && !setdefaults(up)) {
warn("can't create `%s' defaults file", CONFFILE);
}
fp = fopen(CONFFILE, "r");
}
if (fp != NULL) {
while ((s = fparseln(fp, &len, &lineno, NULL, 0)) != NULL) {
if (strncmp(s, "group", 5) == 0) {
for (cp = s + 5 ; isspace((unsigned char)*cp); cp++) {
}
strsave(&up->u_primgrp, cp);
} else if (strncmp(s, "base_dir", 8) == 0) {
for (cp = s + 8 ; isspace((unsigned char)*cp); cp++) {
}
strsave(&up->u_basedir, cp);
} else if (strncmp(s, "skel_dir", 8) == 0) {
for (cp = s + 8 ; isspace((unsigned char)*cp); cp++) {
}
strsave(&up->u_skeldir, cp);
} else if (strncmp(s, "shell", 5) == 0) {
for (cp = s + 5 ; isspace((unsigned char)*cp); cp++) {
}
strsave(&up->u_shell, cp);
} else if (strncmp(s, "password", 8) == 0) {
for (cp = s + 8 ; isspace((unsigned char)*cp); cp++) {
}
strsave(&up->u_password, cp);
} else if (strncmp(s, "class", 5) == 0) {
for (cp = s + 5 ; isspace((unsigned char)*cp); cp++) {
}
strsave(&up->u_class, cp);
} else if (strncmp(s, "inactive", 8) == 0) {
for (cp = s + 8 ; isspace((unsigned char)*cp); cp++) {
}
if (strcmp(cp, UNSET_INACTIVE) == 0) {
free(up->u_inactive);
up->u_inactive = NULL;
} else {
strsave(&up->u_inactive, cp);
}
} else if (strncmp(s, "range", 5) == 0) {
for (cp = s + 5 ; isspace((unsigned char)*cp); cp++) {
}
(void) save_range(up, cp);
} else if (strncmp(s, "preserve", 8) == 0) {
for (cp = s + 8 ; isspace((unsigned char)*cp); cp++) {
}
up->u_preserve = (strncmp(cp, "true", 4) == 0) ? 1 :
(strncmp(cp, "yes", 3) == 0) ? 1 :
strtonum(cp, INT_MIN, INT_MAX, NULL);
} else if (strncmp(s, "expire", 6) == 0) {
for (cp = s + 6 ; isspace((unsigned char)*cp); cp++) {
}
if (strcmp(cp, UNSET_EXPIRY) == 0) {
free(up->u_expire);
up->u_expire = NULL;
} else {
strsave(&up->u_expire, cp);
}
}
free(s);
}
fclose(fp);
}
if (up->u_rc == 0) {
up->u_rv[up->u_rc].r_from = DEF_LOWUID;
up->u_rv[up->u_rc].r_to = DEF_HIGHUID;
up->u_rc += 1;
}
up->u_defrc = up->u_rc;
}
/* return 1 if the specified uid exists in the passwd file, else 0 */
static int
uid_exists(uid_t uid)
{
return user_from_uid(uid, 1) != NULL;
}
/* return 1 if the specified user exists in the passwd file, else 0 */
static int
user_exists(const char *user)
{
uid_t uid;
return uid_from_user(user, &uid) != -1;
}
/* return the next valid unused uid */
static int
getnextuid(int sync_uid_gid, uid_t *uid, uid_t low_uid, uid_t high_uid)
{
for (*uid = low_uid ; *uid <= high_uid ; (*uid)++) {
if (!uid_exists((uid_t)*uid) && *uid != NOBODY_UID) {
if (sync_uid_gid) {
if (!gid_exists((gid_t)*uid)) {
return 1;
}
} else {
return 1;
}
}
}
return 0;
}
/* look for a valid time, return 0 if it was specified but bad */
static int
scantime(time_t *tp, char *s)
{
struct tm tm;
*tp = 0;
if (s != NULL) {
memset(&tm, 0, sizeof(tm));
tm.tm_isdst = -1;
if (strptime(s, "%c", &tm) != NULL) {
*tp = mktime(&tm);
} else if (strptime(s, "%B %d %Y", &tm) != NULL) {
*tp = mktime(&tm);
} else if (isdigit((unsigned char) s[0]) != 0) {
*tp = (time_t)atoll(s);
} else {
return 0;
}
}
return 1;
}
/* compute the extra length '&' expansion consumes */
static size_t
expand_len(const char *p, const char *username)
{
size_t alen;
size_t ulen;
ulen = strlen(username);
for (alen = 0; *p != '\0'; p++)
if (*p == '&')
alen += ulen - 1;
return alen;
}
/* see if we can find out the user struct */
static struct passwd *
find_user_info(const char *name)
{
struct passwd *pwp;
const char *errstr;
uid_t uid;
if ((pwp = getpwnam(name)) == NULL) {
uid = strtonum(name, -1, UID_MAX, &errstr);
if (errstr == NULL)
pwp = getpwuid(uid);
}
return pwp;
}
/* see if we can find out the group struct */
static struct group *
find_group_info(const char *name)
{
struct group *grp;
const char *errstr;
gid_t gid;
if ((grp = getgrnam(name)) == NULL) {
gid = strtonum(name, -1, GID_MAX, &errstr);
if (errstr == NULL)
grp = getgrgid(gid);
}
return grp;
}
/* add a user */
static int
adduser(char *login_name, user_t *up)
{
struct group *grp;
struct stat st;
time_t expire;
time_t inactive;
char password[PasswordLength + 1];
char home[MaxFileNameLen];
char buf[LINE_MAX];
int sync_uid_gid;
int masterfd;
int ptmpfd;
gid_t gid;
int cc;
int i, yp = 0;
FILE *fp;
if (!valid_login(login_name)) {
errx(EXIT_FAILURE, "`%s' is not a valid login name", login_name);
}
if (!valid_class(up->u_class)) {
errx(EXIT_FAILURE, "No such login class `%s'", up->u_class);
}
if ((masterfd = open(_PATH_MASTERPASSWD, O_RDONLY)) == -1) {
err(EXIT_FAILURE, "can't open `%s'", _PATH_MASTERPASSWD);
}
if (flock(masterfd, LOCK_EX | LOCK_NB) == -1) {
err(EXIT_FAILURE, "can't lock `%s'", _PATH_MASTERPASSWD);
}
pw_init();
if ((ptmpfd = pw_lock(WAITSECS)) == -1) {
int saved_errno = errno;
close(masterfd);
errc(EXIT_FAILURE, saved_errno, "can't obtain pw_lock");
}
if ((fp = fdopen(masterfd, "r")) == NULL) {
int saved_errno = errno;
close(masterfd);
close(ptmpfd);
pw_abort();
errc(EXIT_FAILURE, saved_errno,
"can't fdopen `%s' for reading", _PATH_MASTERPASSWD);
}
while (fgets(buf, sizeof(buf), fp) != NULL) {
cc = strlen(buf);
/*
* Stop copying the file at the yp entry; we want to
* put the new user before it, and preserve entries
* after the yp entry.
*/
if (cc > 1 && buf[0] == '+' && buf[1] == ':') {
yp = 1;
break;
}
if (write(ptmpfd, buf, (size_t)(cc)) != cc) {
int saved_errno = errno;
fclose(fp);
close(ptmpfd);
pw_abort();
errc(EXIT_FAILURE, saved_errno,
"short write to /etc/ptmp (not %d chars)", cc);
}
}
if (ferror(fp)) {
int saved_errno = errno;
fclose(fp);
close(ptmpfd);
pw_abort();
errc(EXIT_FAILURE, saved_errno, "read error on %s",
_PATH_MASTERPASSWD);
}
/* if no uid was specified, get next one in [low_uid..high_uid] range */
sync_uid_gid = (strcmp(up->u_primgrp, "=uid") == 0);
if (up->u_uid == -1) {
int got_id = 0;
/*
* Look for a free UID in the command line ranges (if any).
* These start after the ranges specified in the config file.
*/
for (i = up->u_defrc; got_id == 0 && i < up->u_rc ; i++) {
got_id = getnextuid(sync_uid_gid, &up->u_uid,
up->u_rv[i].r_from, up->u_rv[i].r_to);
}
/*
* If there were no free UIDs in the command line ranges,
* try the ranges from the config file (there will always
* be at least one default).
*/
if (got_id == 0) {
for (i = 0; got_id == 0 && i < up->u_defrc; i++) {
got_id = getnextuid(sync_uid_gid, &up->u_uid,
up->u_rv[i].r_from, up->u_rv[i].r_to);
}
}
if (got_id == 0) {
close(ptmpfd);
pw_abort();
errx(EXIT_FAILURE, "can't get next uid for %u", up->u_uid);
}
}
/* check uid isn't already allocated */
if (!(up->u_flags & F_DUPUID) && uid_exists((uid_t)up->u_uid)) {
close(ptmpfd);
pw_abort();
errx(EXIT_FAILURE, "uid %u is already in use", up->u_uid);
}
/* if -g=uid was specified, check gid is unused */
if (sync_uid_gid) {
if (gid_exists((gid_t)up->u_uid)) {
close(ptmpfd);
pw_abort();
errx(EXIT_FAILURE, "gid %u is already in use", up->u_uid);
}
gid = up->u_uid;
} else {
if ((grp = find_group_info(up->u_primgrp)) == NULL) {
close(ptmpfd);
pw_abort();
errx(EXIT_FAILURE, "group %s not found", up->u_primgrp);
}
gid = grp->gr_gid;
}
/* check name isn't already in use */
if (!(up->u_flags & F_DUPUID) && user_exists(login_name)) {
close(ptmpfd);
pw_abort();
errx(EXIT_FAILURE, "already a `%s' user", login_name);
}
if (up->u_flags & F_HOMEDIR) {
if (strlcpy(home, up->u_home, sizeof(home)) >= sizeof(home)) {
close(ptmpfd);
pw_abort();
errx(EXIT_FAILURE, "home directory `%s' too long",
up->u_home);
}
} else {
/* if home directory hasn't been given, make it up */
if (snprintf(home, sizeof(home), "%s/%s", up->u_basedir,
login_name) >= sizeof(home)) {
close(ptmpfd);
pw_abort();
errx(EXIT_FAILURE, "home directory `%s/%s' too long",
up->u_basedir, login_name);
}
}
if (!scantime(&inactive, up->u_inactive)) {
warnx("Warning: inactive time `%s' invalid, password expiry off",
up->u_inactive);
}
if (!scantime(&expire, up->u_expire)) {
warnx("Warning: expire time `%s' invalid, account expiry off",
up->u_expire);
}
if (lstat(home, &st) == -1 && !(up->u_flags & F_MKDIR) &&
strcmp(home, _PATH_NONEXISTENT) != 0) {
warnx("Warning: home directory `%s' doesn't exist, and -m was"
" not specified", home);
}
(void) strlcpy(password, up->u_password ? up->u_password : "*",
sizeof(password));
cc = snprintf(buf, sizeof(buf), "%s:%s:%u:%u:%s:%lld:%lld:%s:%s:%s\n",
login_name,
password,
up->u_uid,
gid,
up->u_class,
(long long) inactive,
(long long) expire,
up->u_comment,
home,
up->u_shell);
if (cc >= sizeof(buf) || cc < 0 ||
cc + expand_len(up->u_comment, login_name) >= 1023) {
close(ptmpfd);
pw_abort();
errx(EXIT_FAILURE, "can't add `%s', line too long", buf);
}
if (write(ptmpfd, buf, (size_t) cc) != cc) {
int saved_errno = errno;
close(ptmpfd);
pw_abort();
errc(EXIT_FAILURE, saved_errno, "can't add `%s'", buf);
}
if (yp) {
/* put back the + line */
cc = snprintf(buf, sizeof(buf), "+:*::::::::\n");
if (cc < 0 || cc >= sizeof(buf)) {
close(ptmpfd);
pw_abort();
errx(EXIT_FAILURE, "can't add `%s', line too long", buf);
}
if (write(ptmpfd, buf, (size_t) cc) != cc) {
int saved_errno = errno;
close(ptmpfd);
pw_abort();
errc(EXIT_FAILURE, saved_errno, "can't add `%s'", buf);
}
/* copy the entries following it, if any */
while (fgets(buf, sizeof(buf), fp) != NULL) {
cc = strlen(buf);
if (write(ptmpfd, buf, (size_t)(cc)) != cc) {
int saved_errno = errno;
fclose(fp);
close(ptmpfd);
pw_abort();
errc(EXIT_FAILURE, saved_errno,
"short write to /etc/ptmp (not %d chars)",
cc);
}
}
if (ferror(fp)) {
int saved_errno = errno;
fclose(fp);
close(ptmpfd);
pw_abort();
errc(EXIT_FAILURE, saved_errno, "read error on %s",
_PATH_MASTERPASSWD);
}
}
if (up->u_flags & F_MKDIR) {
if (lstat(home, &st) == 0) {
close(ptmpfd);
pw_abort();
errx(EXIT_FAILURE, "home directory `%s' already exists",
home);
} else {
char idstr[64];
const char *mkdir_argv[] =
{ "mkdir", "-p", home, NULL };
const char *chown_argv[] =
{ "chown", "-RP", idstr, home, NULL };
const char *chmod_argv[] =
{ "chmod", "-R", "u+w", home, NULL };
if (run(MKDIR, mkdir_argv) != 0) {
int saved_errno = errno;
close(ptmpfd);
pw_abort();
errc(EXIT_FAILURE, saved_errno,
"can't mkdir `%s'", home);
}
(void) copydotfiles(up->u_skeldir, home);
(void) snprintf(idstr, sizeof(idstr), "%u:%u",
up->u_uid, gid);
(void) run(CHOWN, chown_argv);
(void) run(CHMOD, chmod_argv);
}
}
if (strcmp(up->u_primgrp, "=uid") == 0 && !group_exists(login_name) &&
!creategid(login_name, gid, "")) {
close(ptmpfd);
pw_abort();
errx(EXIT_FAILURE, "can't create gid %u for login name %s",
gid, login_name);
}
if (up->u_groupc > 0 && !append_group(login_name, up->u_groupc, up->u_groupv)) {
close(ptmpfd);
pw_abort();
errx(EXIT_FAILURE, "can't append `%s' to new groups", login_name);
}
fclose(fp);
close(ptmpfd);
if (pw_mkdb(yp ? NULL : login_name, 0) == -1) {
pw_abort();
err(EXIT_FAILURE, "pw_mkdb failed");
}
syslog(LOG_INFO, "new user added: name=%s, uid=%u, gid=%u, home=%s, shell=%s",
login_name, up->u_uid, gid, home, up->u_shell);
return 1;
}
/* remove a user from the groups file */
static int
rm_user_from_groups(char *login_name)
{
struct stat st;
size_t login_len;
FILE *from;
FILE *to;
char buf[LINE_MAX];
char f[MaxFileNameLen];
char *cp, *ep;
int fd;
int cc;
login_len = strlen(login_name);
if ((from = fopen(_PATH_GROUP, "r")) == NULL) {
warn("can't remove gid for `%s': can't open `%s'",
login_name, _PATH_GROUP);
return 0;
}
if (flock(fileno(from), LOCK_EX | LOCK_NB) == -1) {
warn("can't lock `%s'", _PATH_GROUP);
}
(void) fstat(fileno(from), &st);
(void) snprintf(f, sizeof(f), "%s.XXXXXXXX", _PATH_GROUP);
if ((fd = mkstemp(f)) == -1) {
warn("can't remove gid for `%s': mkstemp failed", login_name);
fclose(from);
return 0;
}
if ((to = fdopen(fd, "w")) == NULL) {
warn("can't remove gid for `%s': fdopen `%s' failed",
login_name, f);
fclose(from);
close(fd);
unlink(f);
return 0;
}
while (fgets(buf, sizeof(buf), from) != NULL) {
cc = strlen(buf);
if (cc > 0 && buf[cc - 1] != '\n' && !feof(from)) {
while (fgetc(from) != '\n' && !feof(from))
cc++;
warnx("%s: line `%s' too long (%d bytes), skipping",
_PATH_GROUP, buf, cc);
continue;
}
/* Break out the group list. */
for (cp = buf, cc = 0; *cp != '\0' && cc < 3; cp++) {
if (*cp == ':')
cc++;
}
if (cc != 3) {
buf[strcspn(buf, "\n")] = '\0';
warnx("Malformed entry `%s'. Skipping", buf);
continue;
}
while ((cp = strstr(cp, login_name)) != NULL) {
if ((cp[-1] == ':' || cp[-1] == ',') &&
(cp[login_len] == ',' || cp[login_len] == '\n')) {
ep = cp + login_len;
if (cp[login_len] == ',')
ep++;
else if (cp[-1] == ',')
cp--;
memmove(cp, ep, strlen(ep) + 1);
} else {
if ((cp = strchr(cp, ',')) == NULL)
break;
cp++;
}
}
if (fwrite(buf, strlen(buf), 1, to) != 1) {
warn("can't remove gid for `%s': short write to `%s'",
login_name, f);
fclose(from);
fclose(to);
unlink(f);
return 0;
}
}
(void) fchmod(fileno(to), st.st_mode & 0777);
fclose(from);
if (fclose(to) == EOF) {
warn("can't remove gid for `%s': short write to `%s'",
login_name, f);
unlink(f);
return 0;
}
if (rename(f, _PATH_GROUP) == -1) {
warn("can't remove gid for `%s': can't rename `%s' to `%s'",
login_name, f, _PATH_GROUP);
unlink(f);
return 0;
}
return 1;
}
/* check that the user or group is local, not from YP/NIS */
static int
is_local(char *name, const char *file)
{
FILE *fp;
char buf[LINE_MAX];
size_t len;
int ret;
int cc;
if ((fp = fopen(file, "r")) == NULL) {
err(EXIT_FAILURE, "can't open `%s'", file);
}
len = strlen(name);
for (ret = 0 ; fgets(buf, sizeof(buf), fp) != NULL ; ) {
cc = strlen(buf);
if (cc > 0 && buf[cc - 1] != '\n' && !feof(fp)) {
while (fgetc(fp) != '\n' && !feof(fp))
cc++;
warnx("%s: line `%s' too long (%d bytes), skipping",
file, buf, cc);
continue;
}
if (strncmp(buf, name, len) == 0 && buf[len] == ':') {
ret = 1;
break;
}
}
fclose(fp);
return ret;
}
/* modify a user */
static int
moduser(char *login_name, char *newlogin, user_t *up)
{
struct passwd *pwp = NULL;
struct group *grp;
const char *homedir;
char buf[LINE_MAX];
char acctlock_str[] = "-";
char pwlock_str[] = "*";
char pw_len[PasswordLength + 1];
char shell_len[MaxShellNameLen];
char *shell_last_char;
size_t colonc, loginc;
size_t cc;
size_t shell_buf;
FILE *master;
char newdir[MaxFileNameLen];
char *colon;
char *pw_tmp = NULL;
char *shell_tmp = NULL;
int len;
int locked = 0;
int unlocked = 0;
int masterfd;
int ptmpfd;
int rval;
int i;
if (!valid_login(newlogin)) {
errx(EXIT_FAILURE, "`%s' is not a valid login name", login_name);
}
if ((pwp = getpwnam_shadow(login_name)) == NULL) {
errx(EXIT_FAILURE, "No such user `%s'", login_name);
}
if (up != NULL) {
if ((*pwp->pw_passwd != '\0') &&
(up->u_flags & F_PASSWORD) == 0) {
up->u_flags |= F_PASSWORD;
strsave(&up->u_password, pwp->pw_passwd);
explicit_bzero(pwp->pw_passwd, strlen(pwp->pw_passwd));
}
}
endpwent();
if (pledge("stdio rpath wpath cpath fattr flock proc exec getpw id",
NULL) == -1)
err(1, "pledge");
if (!is_local(login_name, _PATH_MASTERPASSWD)) {
errx(EXIT_FAILURE, "User `%s' must be a local user", login_name);
}
if (up != NULL) {
if ((up->u_flags & (F_ACCTLOCK | F_ACCTUNLOCK)) && (pwp->pw_uid < 1000))
errx(EXIT_FAILURE, "(un)locking is not supported for the `%s' account", pwp->pw_name);
}
/* keep dir name in case we need it for '-m' */
homedir = pwp->pw_dir;
/* get the last char of the shell in case we need it for '-U' or '-Z' */
shell_last_char = pwp->pw_shell+strlen(pwp->pw_shell) - 1;
if ((masterfd = open(_PATH_MASTERPASSWD, O_RDONLY)) == -1) {
err(EXIT_FAILURE, "can't open `%s'", _PATH_MASTERPASSWD);
}
if (flock(masterfd, LOCK_EX | LOCK_NB) == -1) {
err(EXIT_FAILURE, "can't lock `%s'", _PATH_MASTERPASSWD);
}
pw_init();
if ((ptmpfd = pw_lock(WAITSECS)) == -1) {
int saved_errno = errno;
close(masterfd);
errc(EXIT_FAILURE, saved_errno, "can't obtain pw_lock");
}
if ((master = fdopen(masterfd, "r")) == NULL) {
int saved_errno = errno;
close(masterfd);
close(ptmpfd);
pw_abort();
errc(EXIT_FAILURE, saved_errno, "can't fdopen fd for %s",
_PATH_MASTERPASSWD);
}
if (up != NULL) {
if (up->u_flags & F_USERNAME) {
/* if changing name, check new name isn't already in use */
if (strcmp(login_name, newlogin) != 0 &&
user_exists(newlogin)) {
close(ptmpfd);
pw_abort();
errx(EXIT_FAILURE, "already a `%s' user", newlogin);
}
pwp->pw_name = newlogin;
/*
* Provide a new directory name in case the
* home directory is to be moved.
*/
if (up->u_flags & F_MKDIR) {
(void) snprintf(newdir, sizeof(newdir),
"%s/%s", up->u_basedir, newlogin);
pwp->pw_dir = newdir;
}
}
if (up->u_flags & F_PASSWORD) {
if (up->u_password != NULL)
pwp->pw_passwd = up->u_password;
}
if (up->u_flags & F_ACCTLOCK) {
/* lock the account */
if (*shell_last_char != *acctlock_str) {
shell_tmp = malloc(strlen(pwp->pw_shell) + sizeof(acctlock_str));
if (shell_tmp == NULL) {
close(ptmpfd);
pw_abort();
errx(EXIT_FAILURE, "account lock: cannot allocate memory");
}
strlcpy(shell_tmp, pwp->pw_shell, sizeof(shell_len));
strlcat(shell_tmp, acctlock_str, sizeof(shell_len));
pwp->pw_shell = shell_tmp;
} else {
locked++;
}
/* lock the password */
if (strncmp(pwp->pw_passwd, pwlock_str, sizeof(pwlock_str)-1) != 0) {
pw_tmp = malloc(strlen(pwp->pw_passwd) + sizeof(pwlock_str));
if (pw_tmp == NULL) {
close(ptmpfd);
pw_abort();
errx(EXIT_FAILURE, "password lock: cannot allocate memory");
}
strlcpy(pw_tmp, pwlock_str, sizeof(pw_len));
strlcat(pw_tmp, pwp->pw_passwd, sizeof(pw_len));
pwp->pw_passwd = pw_tmp;
} else {
locked++;
}
if (locked > 1)
warnx("account `%s' is already locked", pwp->pw_name);
}
if (up->u_flags & F_ACCTUNLOCK) {
/* unlock the password */
if (strcmp(pwp->pw_passwd, pwlock_str) != 0 &&
strcmp(pwp->pw_passwd, "*************") != 0) {
if (strncmp(pwp->pw_passwd, pwlock_str, sizeof(pwlock_str)-1) == 0) {
pwp->pw_passwd += sizeof(pwlock_str)-1;
} else {
unlocked++;
}
} else {
warnx("account `%s' has no password: cannot fully unlock", pwp->pw_name);
}
/* unlock the account */
if (*shell_last_char == *acctlock_str) {
shell_buf = strlen(pwp->pw_shell) + 2 - sizeof(acctlock_str);
shell_tmp = malloc(shell_buf);
if (shell_tmp == NULL) {
close(ptmpfd);
pw_abort();
errx(EXIT_FAILURE, "unlock: cannot allocate memory");
}
strlcpy(shell_tmp, pwp->pw_shell, shell_buf);
pwp->pw_shell = shell_tmp;
} else {
unlocked++;
}
if (unlocked > 1)
warnx("account `%s' is not locked", pwp->pw_name);
}
if (up->u_flags & F_UID) {
/* check uid isn't already allocated */
if (!(up->u_flags & F_DUPUID) &&
uid_exists((uid_t)up->u_uid)) {
close(ptmpfd);
pw_abort();
errx(EXIT_FAILURE, "uid %u is already in use", up->u_uid);
}
pwp->pw_uid = up->u_uid;
}
if (up->u_flags & F_GROUP) {
/* if -g=uid was specified, check gid is unused */
if (strcmp(up->u_primgrp, "=uid") == 0) {
if (gid_exists((gid_t)pwp->pw_uid)) {
close(ptmpfd);
pw_abort();
errx(EXIT_FAILURE, "gid %u is already "
"in use", pwp->pw_uid);
}
pwp->pw_gid = pwp->pw_uid;
if (!creategid(newlogin, pwp->pw_gid, "")) {
close(ptmpfd);
pw_abort();
errx(EXIT_FAILURE, "could not create "
"group %s with gid %u", newlogin,
pwp->pw_gid);
}
} else {
if ((grp = find_group_info(up->u_primgrp)) == NULL) {
close(ptmpfd);
pw_abort();
errx(EXIT_FAILURE, "group %s not found",
up->u_primgrp);
}
pwp->pw_gid = grp->gr_gid;
}
}
if (up->u_flags & F_INACTIVE) {
if (!scantime(&pwp->pw_change, up->u_inactive)) {
warnx("Warning: inactive time `%s' invalid, password expiry off",
up->u_inactive);
}
}
if (up->u_flags & F_EXPIRE) {
if (!scantime(&pwp->pw_expire, up->u_expire)) {
warnx("Warning: expire time `%s' invalid, account expiry off",
up->u_expire);
}
}
if (up->u_flags & F_COMMENT)
pwp->pw_gecos = up->u_comment;
if (up->u_flags & F_HOMEDIR)
pwp->pw_dir = up->u_home;
if (up->u_flags & F_SHELL)
pwp->pw_shell = up->u_shell;
if (up->u_flags & F_CLASS) {
if (!valid_class(up->u_class)) {
close(ptmpfd);
pw_abort();
errx(EXIT_FAILURE,
"No such login class `%s'", up->u_class);
}
pwp->pw_class = up->u_class;
}
}
loginc = strlen(login_name);
while (fgets(buf, sizeof(buf), master) != NULL) {
if ((colon = strchr(buf, ':')) == NULL) {
warnx("Malformed entry `%s'. Skipping", buf);
continue;
}
colonc = (size_t)(colon - buf);
if (strncmp(login_name, buf, loginc) == 0 && loginc == colonc) {
if (up != NULL) {
if ((len = snprintf(buf, sizeof(buf),
"%s:%s:%u:%u:%s:%lld:%lld:%s:%s:%s\n",
newlogin,
pwp->pw_passwd,
pwp->pw_uid,
pwp->pw_gid,
pwp->pw_class,
(long long)pwp->pw_change,
(long long)pwp->pw_expire,
pwp->pw_gecos,
pwp->pw_dir,
pwp->pw_shell)) >= sizeof(buf) || len < 0 ||
len + expand_len(pwp->pw_gecos, newlogin)
>= 1023) {
close(ptmpfd);
pw_abort();
errx(EXIT_FAILURE, "can't add `%s', "
"line too long (%zu bytes)", buf,
len + expand_len(pwp->pw_gecos,
newlogin));
}
if (write(ptmpfd, buf, len) != len) {
int saved_errno = errno;
close(ptmpfd);
pw_abort();
errc(EXIT_FAILURE, saved_errno,
"can't add `%s'", buf);
}
}
} else {
len = strlen(buf);
if ((cc = write(ptmpfd, buf, len)) != len) {
int saved_errno = errno;
close(masterfd);
close(ptmpfd);
pw_abort();
errc(EXIT_FAILURE, saved_errno,
"short write to /etc/ptmp (%lld not %lld chars)",
(long long)cc, (long long)len);
}
}
}
if (up != NULL) {
const char *mv_argv[] = { "mv", homedir, pwp->pw_dir, NULL };
if ((up->u_flags & F_MKDIR) &&
run(MV, mv_argv) != 0) {
int saved_errno = errno;
close(ptmpfd);
pw_abort();
errc(EXIT_FAILURE, saved_errno,
"can't move `%s' to `%s'", homedir, pwp->pw_dir);
}
if (up->u_flags & F_SETSECGROUP) {
for (i = 0 ; i < up->u_groupc ; i++) {
if (!group_exists(up->u_groupv[i])) {
close(ptmpfd);
pw_abort();
errx(EXIT_FAILURE,
"aborting, group `%s' does not exist",
up->u_groupv[i]);
}
}
if (!rm_user_from_groups(newlogin)) {
close(ptmpfd);
pw_abort();
errx(EXIT_FAILURE,
"can't reset groups for `%s'", newlogin);
}
}
if (up->u_groupc > 0) {
if (!append_group(newlogin, up->u_groupc, up->u_groupv)) {
close(ptmpfd);
pw_abort();
errx(EXIT_FAILURE, "can't append `%s' to new groups",
newlogin);
}
}
}
fclose(master);
close(ptmpfd);
free(pw_tmp);
free(shell_tmp);
if (up != NULL && strcmp(login_name, newlogin) == 0)
rval = pw_mkdb(login_name, 0);
else
rval = pw_mkdb(NULL, 0);
if (rval == -1) {
pw_abort();
err(EXIT_FAILURE, "pw_mkdb failed");
}
if (up == NULL) {
syslog(LOG_INFO, "user removed: name=%s", login_name);
} else if (strcmp(login_name, newlogin) == 0) {
syslog(LOG_INFO, "user information modified: name=%s, uid=%u, gid=%u, home=%s, shell=%s",
login_name, pwp->pw_uid, pwp->pw_gid, pwp->pw_dir, pwp->pw_shell);
} else {
syslog(LOG_INFO, "user information modified: name=%s, new name=%s, uid=%u, gid=%u, home=%s, shell=%s",
login_name, newlogin, pwp->pw_uid, pwp->pw_gid, pwp->pw_dir, pwp->pw_shell);
}
return 1;
}
/* print out usage message, and then exit */
void
usermgmt_usage(const char *prog)
{
if (strcmp(prog, "useradd") == 0) {
fprintf(stderr, "usage: %s -D [-b base-directory] "
"[-e expiry-time] [-f inactive-time]\n"
" [-g gid | name | =uid] [-k skel-directory] "
"[-L login-class]\n"
" [-r low..high] [-s shell]\n", prog);
fprintf(stderr, " %s [-mov] [-b base-directory] "
"[-c comment] [-d home-directory]\n"
" [-e expiry-time] [-f inactive-time]\n"
" [-G secondary-group[,group,...]] "
"[-g gid | name | =uid]\n"
" [-k skel-directory] [-L login-class] "
"[-p password] [-r low..high]\n"
" [-s shell] [-u uid] user\n", prog);
} else if (strcmp(prog, "usermod") == 0) {
fprintf(stderr, "usage: %s [-moUvZ] "
"[-c comment] [-d home-directory] [-e expiry-time]\n"
" [-f inactive-time] "
"[-G secondary-group[,group,...]]\n"
" [-g gid | name | =uid] [-L login-class] "
"[-l new-login]\n"
" [-p password] "
"[-S secondary-group[,group,...]]\n"
" [-s shell] [-u uid] user\n",
prog);
} else if (strcmp(prog, "userdel") == 0) {
fprintf(stderr, "usage: %s -D [-p preserve-value]\n",
prog);
fprintf(stderr, " %s [-rv] [-p preserve-value] "
"user\n", prog);
} else if (strcmp(prog, "userinfo") == 0) {
fprintf(stderr, "usage: %s [-e] user\n", prog);
} else if (strcmp(prog, "groupadd") == 0) {
fprintf(stderr, "usage: %s [-ov] [-g gid] group\n",
prog);
} else if (strcmp(prog, "groupdel") == 0) {
fprintf(stderr, "usage: %s [-v] group\n", prog);
} else if (strcmp(prog, "groupmod") == 0) {
fprintf(stderr, "usage: %s [-ov] [-g gid] [-n newname] "
"group\n", prog);
} else if (strcmp(prog, "user") == 0 || strcmp(prog, "group") == 0) {
fprintf(stderr, "usage: %s [add | del | mod"
" | info"
"] ...\n",
prog);
} else if (strcmp(prog, "groupinfo") == 0) {
fprintf(stderr, "usage: %s [-e] group\n", prog);
} else {
fprintf(stderr, "This program must be called as {user,group}{add,del,mod,info},\n%s is not an understood name.\n", prog);
}
exit(EXIT_FAILURE);
}
int
useradd(int argc, char **argv)
{
user_t u;
const char *errstr;
int defaultfield;
int bigD;
int c;
int i;
memset(&u, 0, sizeof(u));
read_defaults(&u);
u.u_uid = -1;
defaultfield = bigD = 0;
while ((c = getopt(argc, argv, "DG:L:b:c:d:e:f:g:k:mop:r:s:u:v")) != -1) {
switch(c) {
case 'D':
bigD = 1;
break;
case 'G':
while ((u.u_groupv[u.u_groupc] = strsep(&optarg, ",")) != NULL &&
u.u_groupc < NGROUPS_MAX - 2) {
if (u.u_groupv[u.u_groupc][0] != 0) {
u.u_groupc++;
}
}
if (optarg != NULL) {
warnx("Truncated list of secondary groups to %d entries", NGROUPS_MAX - 2);
}
break;
case 'b':
defaultfield = 1;
strsave(&u.u_basedir, optarg);
break;
case 'c':
strsave(&u.u_comment, optarg);
break;
case 'd':
strsave(&u.u_home, optarg);
u.u_flags |= F_HOMEDIR;
break;
case 'e':
defaultfield = 1;
strsave(&u.u_expire, optarg);
break;
case 'f':
defaultfield = 1;
strsave(&u.u_inactive, optarg);
break;
case 'g':
defaultfield = 1;
strsave(&u.u_primgrp, optarg);
break;
case 'k':
defaultfield = 1;
strsave(&u.u_skeldir, optarg);
break;
case 'L':
defaultfield = 1;
strsave(&u.u_class, optarg);
break;
case 'm':
u.u_flags |= F_MKDIR;
break;
case 'o':
u.u_flags |= F_DUPUID;
break;
case 'p':
strsave(&u.u_password, optarg);
explicit_bzero(optarg, strlen(optarg));
break;
case 'r':
defaultfield = 1;
if (!save_range(&u, optarg))
exit(EXIT_FAILURE);
break;
case 's':
defaultfield = 1;
strsave(&u.u_shell, optarg);
break;
case 'u':
u.u_uid = strtonum(optarg, -1, UID_MAX, &errstr);
if (errstr != NULL) {
errx(EXIT_FAILURE, "When using [-u uid], the uid must be numeric");
}
break;
case 'v':
verbose = 1;
break;
default:
usermgmt_usage("useradd");
}
}
if (pledge("stdio rpath wpath cpath fattr flock proc exec getpw id",
NULL) == -1)
err(1, "pledge");
if (bigD) {
if (defaultfield) {
checkeuid();
return setdefaults(&u) ? EXIT_SUCCESS : EXIT_FAILURE;
}
printf("group\t\t%s\n", u.u_primgrp);
printf("base_dir\t%s\n", u.u_basedir);
printf("skel_dir\t%s\n", u.u_skeldir);
printf("shell\t\t%s\n", u.u_shell);
printf("class\t\t%s\n", u.u_class);
printf("inactive\t%s\n", (u.u_inactive == NULL) ? UNSET_INACTIVE : u.u_inactive);
printf("expire\t\t%s\n", (u.u_expire == NULL) ? UNSET_EXPIRY : u.u_expire);
for (i = 0 ; i < u.u_rc ; i++) {
printf("range\t\t%u..%u\n", u.u_rv[i].r_from, u.u_rv[i].r_to);
}
return EXIT_SUCCESS;
}
argc -= optind;
argv += optind;
if (argc != 1) {
usermgmt_usage("useradd");
}
checkeuid();
openlog("useradd", LOG_PID, LOG_USER);
return adduser(*argv, &u) ? EXIT_SUCCESS : EXIT_FAILURE;
}
int
usermod(int argc, char **argv)
{
user_t u;
char newuser[MaxUserNameLen + 1];
int c, have_new_user;
const char *errstr;
memset(&u, 0, sizeof(u));
memset(newuser, 0, sizeof(newuser));
read_defaults(&u);
free(u.u_primgrp);
u.u_primgrp = NULL;
have_new_user = 0;
while ((c = getopt(argc, argv, "G:L:S:UZc:d:e:f:g:l:mop:s:u:v")) != -1) {
switch(c) {
case 'G':
while ((u.u_groupv[u.u_groupc] = strsep(&optarg, ",")) != NULL &&
u.u_groupc < NGROUPS_MAX - 2) {
if (u.u_groupv[u.u_groupc][0] != 0) {
u.u_groupc++;
}
}
if (optarg != NULL) {
warnx("Truncated list of secondary groups to %d entries", NGROUPS_MAX - 2);
}
u.u_flags |= F_SECGROUP;
break;
case 'S':
while ((u.u_groupv[u.u_groupc] = strsep(&optarg, ",")) != NULL &&
u.u_groupc < NGROUPS_MAX - 2) {
if (u.u_groupv[u.u_groupc][0] != 0) {
u.u_groupc++;
}
}
if (optarg != NULL) {
warnx("Truncated list of secondary groups to %d entries", NGROUPS_MAX - 2);
}
u.u_flags |= F_SETSECGROUP;
break;
case 'U':
u.u_flags |= F_ACCTUNLOCK;
break;
case 'Z':
u.u_flags |= F_ACCTLOCK;
break;
case 'c':
strsave(&u.u_comment, optarg);
u.u_flags |= F_COMMENT;
break;
case 'd':
strsave(&u.u_home, optarg);
u.u_flags |= F_HOMEDIR;
break;
case 'e':
strsave(&u.u_expire, optarg);
u.u_flags |= F_EXPIRE;
break;
case 'f':
strsave(&u.u_inactive, optarg);
u.u_flags |= F_INACTIVE;
break;
case 'g':
strsave(&u.u_primgrp, optarg);
u.u_flags |= F_GROUP;
break;
case 'l':
if (strlcpy(newuser, optarg, sizeof(newuser)) >=
sizeof(newuser))
errx(EXIT_FAILURE, "username `%s' too long",
optarg);
have_new_user = 1;
u.u_flags |= F_USERNAME;
break;
case 'L':
strsave(&u.u_class, optarg);
u.u_flags |= F_CLASS;
break;
case 'm':
u.u_flags |= F_MKDIR;
break;
case 'o':
u.u_flags |= F_DUPUID;
break;
case 'p':
strsave(&u.u_password, optarg);
explicit_bzero(optarg, strlen(optarg));
u.u_flags |= F_PASSWORD;
break;
case 's':
strsave(&u.u_shell, optarg);
u.u_flags |= F_SHELL;
break;
case 'u':
u.u_uid = strtonum(optarg, -1, UID_MAX, &errstr);
u.u_flags |= F_UID;
if (errstr != NULL) {
errx(EXIT_FAILURE, "When using [-u uid], the uid must be numeric");
}
break;
case 'v':
verbose = 1;
break;
default:
usermgmt_usage("usermod");
}
}
if ((u.u_flags & F_MKDIR) && !(u.u_flags & F_HOMEDIR) &&
!(u.u_flags & F_USERNAME)) {
warnx("option 'm' useless without 'd' or 'l' -- ignored");
u.u_flags &= ~F_MKDIR;
}
if ((u.u_flags & F_SECGROUP) && (u.u_flags & F_SETSECGROUP))
errx(EXIT_FAILURE, "options 'G' and 'S' are mutually exclusive");
if ((u.u_flags & F_ACCTLOCK) && (u.u_flags & F_ACCTUNLOCK))
errx(EXIT_FAILURE, "options 'U' and 'Z' are mutually exclusive");
if ((u.u_flags & F_PASSWORD) && (u.u_flags & (F_ACCTLOCK | F_ACCTUNLOCK)))
errx(EXIT_FAILURE, "options 'U' or 'Z' with 'p' are mutually exclusive");
argc -= optind;
argv += optind;
if (argc != 1) {
usermgmt_usage("usermod");
}
checkeuid();
openlog("usermod", LOG_PID, LOG_USER);
return moduser(*argv, (have_new_user) ? newuser : *argv, &u) ?
EXIT_SUCCESS : EXIT_FAILURE;
}
int
userdel(int argc, char **argv)
{
struct passwd *pwp;
user_t u;
int defaultfield;
int rmhome;
int bigD;
int c;
memset(&u, 0, sizeof(u));
read_defaults(&u);
defaultfield = bigD = rmhome = 0;
while ((c = getopt(argc, argv, "Dp:rv")) != -1) {
switch(c) {
case 'D':
bigD = 1;
break;
case 'p':
defaultfield = 1;
u.u_preserve = (strcmp(optarg, "true") == 0) ? 1 :
(strcmp(optarg, "yes") == 0) ? 1 :
strtonum(optarg, INT_MIN, INT_MAX, NULL);
break;
case 'r':
rmhome = 1;
break;
case 'v':
verbose = 1;
break;
default:
usermgmt_usage("userdel");
}
}
if (bigD) {
if (defaultfield) {
checkeuid();
return setdefaults(&u) ? EXIT_SUCCESS : EXIT_FAILURE;
}
printf("preserve\t%s\n", (u.u_preserve) ? "true" : "false");
return EXIT_SUCCESS;
}
argc -= optind;
argv += optind;
if (argc != 1) {
usermgmt_usage("userdel");
}
if (pledge("stdio rpath wpath cpath fattr flock proc exec getpw id",
NULL) == -1)
err(1, "pledge");
checkeuid();
if ((pwp = getpwnam(*argv)) == NULL) {
warnx("No such user `%s'", *argv);
return EXIT_FAILURE;
}
if (rmhome)
(void)removehomedir(pwp->pw_name, pwp->pw_uid, pwp->pw_dir);
if (u.u_preserve) {
u.u_flags |= F_SHELL;
strsave(&u.u_shell, NOLOGIN);
strsave(&u.u_password, "*");
u.u_flags |= F_PASSWORD;
openlog("userdel", LOG_PID, LOG_USER);
return moduser(*argv, *argv, &u) ? EXIT_SUCCESS : EXIT_FAILURE;
}
if (!rm_user_from_groups(*argv)) {
return 0;
}
openlog("userdel", LOG_PID, LOG_USER);
return moduser(*argv, *argv, NULL) ? EXIT_SUCCESS : EXIT_FAILURE;
}
/* add a group */
int
groupadd(int argc, char **argv)
{
int dupgid;
int gid;
int c;
const char *errstr;
gid = -1;
dupgid = 0;
while ((c = getopt(argc, argv, "g:ov")) != -1) {
switch(c) {
case 'g':
gid = strtonum(optarg, -1, GID_MAX, &errstr);
if (errstr != NULL) {
errx(EXIT_FAILURE, "When using [-g gid], the gid must be numeric");
}
break;
case 'o':
dupgid = 1;
break;
case 'v':
verbose = 1;
break;
default:
usermgmt_usage("groupadd");
}
}
argc -= optind;
argv += optind;
if (argc != 1) {
usermgmt_usage("groupadd");
}
if (pledge("stdio rpath wpath cpath fattr flock getpw", NULL) == -1)
err(1, "pledge");
checkeuid();
if (!valid_group(*argv)) {
errx(EXIT_FAILURE, "invalid group name `%s'", *argv);
}
if (gid < 0 && !getnextgid(&gid, LowGid, HighGid)) {
errx(EXIT_FAILURE, "can't add group: can't get next gid");
}
if (!dupgid && gid_exists((gid_t)gid)) {
errx(EXIT_FAILURE, "can't add group: gid %d is a duplicate", gid);
}
openlog("groupadd", LOG_PID, LOG_USER);
if (!creategid(*argv, gid, "")) {
errx(EXIT_FAILURE, "can't add group: problems with %s file",
_PATH_GROUP);
}
return EXIT_SUCCESS;
}
/* remove a group */
int
groupdel(int argc, char **argv)
{
int c;
while ((c = getopt(argc, argv, "v")) != -1) {
switch(c) {
case 'v':
verbose = 1;
break;
default:
usermgmt_usage("groupdel");
}
}
argc -= optind;
argv += optind;
if (argc != 1) {
usermgmt_usage("groupdel");
}
checkeuid();
openlog("groupdel", LOG_PID, LOG_USER);
if (!group_exists(*argv)) {
warnx("No such group: `%s'", *argv);
return EXIT_FAILURE;
}
if (pledge("stdio rpath wpath cpath fattr flock", NULL) == -1)
err(1, "pledge");
if (!modify_gid(*argv, NULL)) {
err(EXIT_FAILURE, "can't change %s file", _PATH_GROUP);
}
return EXIT_SUCCESS;
}
/* modify a group */
int
groupmod(int argc, char **argv)
{
struct group *grp;
const char *errstr;
char buf[LINE_MAX];
char *newname;
char **cpp;
int dupgid;
int gid;
int cc;
int c;
gid = -1;
dupgid = 0;
newname = NULL;
while ((c = getopt(argc, argv, "g:n:ov")) != -1) {
switch(c) {
case 'g':
gid = strtonum(optarg, -1, GID_MAX, &errstr);
if (errstr != NULL) {
errx(EXIT_FAILURE, "When using [-g gid], the gid must be numeric");
}
break;
case 'o':
dupgid = 1;
break;
case 'n':
strsave(&newname, optarg);
break;
case 'v':
verbose = 1;
break;
default:
usermgmt_usage("groupmod");
}
}
argc -= optind;
argv += optind;
if (argc != 1) {
usermgmt_usage("groupmod");
}
checkeuid();
if (gid < 0 && newname == NULL) {
errx(EXIT_FAILURE, "Nothing to change");
}
if (dupgid && gid < 0) {
errx(EXIT_FAILURE, "Duplicate which gid?");
}
if ((grp = getgrnam(*argv)) == NULL) {
errx(EXIT_FAILURE, "can't find group `%s' to modify", *argv);
}
if (pledge("stdio rpath wpath cpath fattr flock", NULL) == -1)
err(1, "pledge");
if (!is_local(*argv, _PATH_GROUP)) {
errx(EXIT_FAILURE, "Group `%s' must be a local group", *argv);
}
if (newname != NULL && !valid_group(newname)) {
errx(EXIT_FAILURE, "invalid group name `%s'", newname);
}
if ((cc = snprintf(buf, sizeof(buf), "%s:%s:%u:",
(newname) ? newname : grp->gr_name, grp->gr_passwd,
(gid < 0) ? grp->gr_gid : gid)) >= sizeof(buf) || cc < 0)
errx(EXIT_FAILURE, "group `%s' entry too long", grp->gr_name);
for (cpp = grp->gr_mem ; *cpp ; cpp++) {
cc = strlcat(buf, *cpp, sizeof(buf)) + 1;
if (cc >= sizeof(buf))
errx(EXIT_FAILURE, "group `%s' entry too long",
grp->gr_name);
if (cpp[1] != NULL) {
buf[cc - 1] = ',';
buf[cc] = '\0';
}
}
cc = strlcat(buf, "\n", sizeof(buf));
if (cc >= sizeof(buf))
errx(EXIT_FAILURE, "group `%s' entry too long", grp->gr_name);
openlog("groupmod", LOG_PID, LOG_USER);
if (!modify_gid(*argv, buf))
err(EXIT_FAILURE, "can't change %s file", _PATH_GROUP);
return EXIT_SUCCESS;
}
/* display user information */
int
userinfo(int argc, char **argv)
{
struct passwd *pwp;
struct group *grp;
char **cpp;
int exists;
int i;
exists = 0;
while ((i = getopt(argc, argv, "ev")) != -1) {
switch(i) {
case 'e':
exists = 1;
break;
case 'v':
verbose = 1;
break;
default:
usermgmt_usage("userinfo");
}
}
argc -= optind;
argv += optind;
if (argc != 1) {
usermgmt_usage("userinfo");
}
if (pledge("stdio getpw", NULL) == -1)
err(1, "pledge");
pwp = find_user_info(*argv);
if (exists) {
exit((pwp) ? EXIT_SUCCESS : EXIT_FAILURE);
}
if (pwp == NULL) {
errx(EXIT_FAILURE, "can't find user `%s'", *argv);
}
printf("login\t%s\n", pwp->pw_name);
printf("passwd\t%s\n", pwp->pw_passwd);
printf("uid\t%u\n", pwp->pw_uid);
if ((grp = getgrgid(pwp->pw_gid)) == NULL)
printf("groups\t%u", pwp->pw_gid);
else
printf("groups\t%s", grp->gr_name);
while ((grp = getgrent()) != NULL) {
for (cpp = grp->gr_mem ; *cpp ; cpp++) {
if (strcmp(*cpp, pwp->pw_name) == 0 &&
grp->gr_gid != pwp->pw_gid)
printf(" %s", grp->gr_name);
}
}
fputc('\n', stdout);
printf("change\t%s", pwp->pw_change ? ctime(&pwp->pw_change) : "NEVER\n");
printf("class\t%s\n", pwp->pw_class);
printf("gecos\t%s\n", pwp->pw_gecos);
printf("dir\t%s\n", pwp->pw_dir);
printf("shell\t%s\n", pwp->pw_shell);
printf("expire\t%s", pwp->pw_expire ? ctime(&pwp->pw_expire) : "NEVER\n");
return EXIT_SUCCESS;
}
/* display user information */
int
groupinfo(int argc, char **argv)
{
struct group *grp;
char **cpp;
int exists;
int i;
exists = 0;
while ((i = getopt(argc, argv, "ev")) != -1) {
switch(i) {
case 'e':
exists = 1;
break;
case 'v':
verbose = 1;
break;
default:
usermgmt_usage("groupinfo");
}
}
argc -= optind;
argv += optind;
if (argc != 1) {
usermgmt_usage("groupinfo");
}
if (pledge("stdio getpw", NULL) == -1)
err(1, "pledge");
grp = find_group_info(*argv);
if (exists) {
exit((grp) ? EXIT_SUCCESS : EXIT_FAILURE);
}
if (grp == NULL) {
errx(EXIT_FAILURE, "can't find group `%s'", *argv);
}
printf("name\t%s\n", grp->gr_name);
printf("passwd\t%s\n", grp->gr_passwd);
printf("gid\t%u\n", grp->gr_gid);
printf("members\t");
for (cpp = grp->gr_mem ; *cpp ; cpp++) {
printf("%s ", *cpp);
}
fputc('\n', stdout);
return EXIT_SUCCESS;
}
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