File: [local] / src / usr.bin / cvs / file.c (download)
Revision 1.21, Fri Aug 6 12:09:25 2004 UTC (19 years, 10 months ago) by jfb
Branch: MAIN
Changes since 1.20: +6 -25 lines
the CF_STAT flag is useless now, all we have to do is extract the required
information and keep it in the file structure
|
/* $OpenBSD: file.c,v 1.21 2004/08/06 12:09:25 jfb Exp $ */
/*
* Copyright (c) 2004 Jean-Francois Brousseau <jfb@openbsd.org>
* 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. 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 ``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/queue.h>
#include <sys/stat.h>
#include <pwd.h>
#include <errno.h>
#include <stdio.h>
#include <fcntl.h>
#include <dirent.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <fnmatch.h>
#include "cvs.h"
#include "log.h"
#include "file.h"
#define CVS_IGN_STATIC 0x01 /* pattern is static, no need to glob */
#define CVS_CHAR_ISMETA(c) ((c == '*') || (c == '?') || (c == '['))
/* ignore pattern */
struct cvs_ignpat {
char ip_pat[MAXNAMLEN];
int ip_flags;
TAILQ_ENTRY (cvs_ignpat) ip_list;
};
/*
* Standard patterns to ignore.
*/
static const char *cvs_ign_std[] = {
".",
"..",
"*.o",
"*.so",
"*.bak",
"*.orig",
"*.rej",
"*.exe",
"*.depend",
"CVS",
"core",
".#*",
#ifdef OLD_SMELLY_CRUFT
"RCSLOG",
"tags",
"TAGS",
"RCS",
"SCCS",
"#*",
",*",
#endif
};
/*
* Entries in the CVS/Entries file with a revision of '0' have only been
* added. Compare against this revision to see if this is the case
*/
static RCSNUM *cvs_addedrev;
TAILQ_HEAD(, cvs_ignpat) cvs_ign_pats;
static int cvs_file_getdir (CVSFILE *, int);
static void cvs_file_freedir (struct cvs_dir *);
static int cvs_file_sort (struct cvs_flist *, u_int);
static int cvs_file_cmp (const void *, const void *);
static CVSFILE* cvs_file_alloc (const char *, u_int);
static CVSFILE* cvs_file_lget (const char *, int, CVSFILE *);
/*
* cvs_file_init()
*
*/
int
cvs_file_init(void)
{
int i;
size_t len;
char path[MAXPATHLEN], buf[MAXNAMLEN];
FILE *ifp;
struct passwd *pwd;
TAILQ_INIT(&cvs_ign_pats);
cvs_addedrev = rcsnum_alloc();
rcsnum_aton("0", NULL, cvs_addedrev);
/* standard patterns to ignore */
for (i = 0; i < (int)(sizeof(cvs_ign_std)/sizeof(char *)); i++)
cvs_file_ignore(cvs_ign_std[i]);
/* read the cvsignore file in the user's home directory, if any */
pwd = getpwuid(getuid());
if (pwd != NULL) {
snprintf(path, sizeof(path), "%s/.cvsignore", pwd->pw_dir);
ifp = fopen(path, "r");
if (ifp == NULL) {
if (errno != ENOENT)
cvs_log(LP_ERRNO, "failed to open `%s'", path);
}
else {
while (fgets(buf, sizeof(buf), ifp) != NULL) {
len = strlen(buf);
if (len == 0)
continue;
if (buf[len - 1] != '\n') {
cvs_log(LP_ERR, "line too long in `%s'",
path);
}
buf[--len] = '\0';
cvs_file_ignore(buf);
}
(void)fclose(ifp);
}
}
return (0);
}
/*
* cvs_file_ignore()
*
* Add the pattern <pat> to the list of patterns for files to ignore.
* Returns 0 on success, or -1 on failure.
*/
int
cvs_file_ignore(const char *pat)
{
char *cp;
struct cvs_ignpat *ip;
ip = (struct cvs_ignpat *)malloc(sizeof(*ip));
if (ip == NULL) {
cvs_log(LP_ERR, "failed to allocate space for ignore pattern");
return (-1);
}
strlcpy(ip->ip_pat, pat, sizeof(ip->ip_pat));
/* check if we will need globbing for that pattern */
ip->ip_flags = CVS_IGN_STATIC;
for (cp = ip->ip_pat; *cp != '\0'; cp++) {
if (CVS_CHAR_ISMETA(*cp)) {
ip->ip_flags &= ~CVS_IGN_STATIC;
break;
}
}
TAILQ_INSERT_TAIL(&cvs_ign_pats, ip, ip_list);
return (0);
}
/*
* cvs_file_chkign()
*
* Returns 1 if the filename <file> is matched by one of the ignore
* patterns, or 0 otherwise.
*/
int
cvs_file_chkign(const char *file)
{
struct cvs_ignpat *ip;
TAILQ_FOREACH(ip, &cvs_ign_pats, ip_list) {
if (ip->ip_flags & CVS_IGN_STATIC) {
if (strcmp(file, ip->ip_pat) == 0)
return (1);
}
else if (fnmatch(ip->ip_pat, file, FNM_PERIOD) == 0)
return (1);
}
return (0);
}
/*
* cvs_file_create()
*
* Create a new file whose path is specified in <path> and of type <type>.
*/
CVSFILE*
cvs_file_create(const char *path, u_int type, mode_t mode)
{
int fd;
CVSFILE *cfp;
cfp = cvs_file_alloc(path, type);
if (cfp == NULL)
return (NULL);
cfp->cf_type = type;
if (type == DT_DIR) {
if (mkdir(path, mode) == -1) {
cvs_file_free(cfp);
return (NULL);
}
}
else {
fd = open(path, O_WRONLY|O_CREAT|O_EXCL, mode);
if (fd == -1) {
cvs_file_free(cfp);
return (NULL);
}
(void)close(fd);
}
return (cfp);
}
/*
* cvs_file_get()
*
* Load a cvs_file structure with all the information pertaining to the file
* <path>.
* The <flags> parameter specifies various flags that alter the behaviour of
* the function. The CF_RECURSE flag causes the function to recursively load
* subdirectories when <path> is a directory.
* The CF_SORT flag causes the files to be sorted in alphabetical order upon
* loading. The special case of "." as a path specification generates
* recursion for a single level and is equivalent to calling cvs_file_get() on
* all files of that directory.
* Returns a pointer to the cvs file structure, which must later be freed
* with cvs_file_free().
*/
CVSFILE*
cvs_file_get(const char *path, int flags)
{
return cvs_file_lget(path, flags, NULL);
}
/*
* cvs_file_getspec()
*
* Load a specific set of files whose paths are given in the vector <fspec>,
* whose size is given in <fsn>.
* Returns a pointer to the lowest common subdirectory to all specified
* files.
*/
CVSFILE*
cvs_file_getspec(char **fspec, int fsn, int flags)
{
/* XXX implement me */
return (NULL);
}
/*
* cvs_file_find()
*
* Find the pointer to a CVS file entry within the file hierarchy <hier>.
* The file's pathname <path> must be relative to the base of <hier>.
* Returns the entry on success, or NULL on failure.
*/
CVSFILE*
cvs_file_find(CVSFILE *hier, const char *path)
{
char *pp, *sp, pbuf[MAXPATHLEN];
CVSFILE *sf, *cf;
strlcpy(pbuf, path, sizeof(pbuf));
cf = hier;
pp = pbuf;
do {
sp = strchr(pp, '/');
if (sp != NULL)
*sp = '\0';
/* special case */
if (*pp == '.') {
if ((*(pp + 1) == '.') && (*(pp + 2) == '\0')) {
/* request to go back to parent */
if (cf->cf_parent == NULL) {
cvs_log(LP_NOTICE,
"path %s goes back too far", path);
return (NULL);
}
cf = cf->cf_parent;
continue;
}
else if (*(pp + 1) == '\0')
continue;
}
TAILQ_FOREACH(sf, &(cf->cf_ddat->cd_files), cf_list)
if (strcmp(pp, sf->cf_name) == 0)
break;
if (sf == NULL)
return (NULL);
cf = sf;
pp = sp;
} while (sp != NULL);
return (NULL);
}
/*
* cvs_file_getdir()
*
* Get a cvs directory structure for the directory whose path is <dir>.
*/
static int
cvs_file_getdir(CVSFILE *cf, int flags)
{
int ret, fd;
u_int ndirs;
long base;
void *dp, *ep;
char fbuf[2048], pbuf[MAXPATHLEN];
struct dirent *ent;
CVSFILE *cfp;
struct stat st;
struct cvs_dir *cdp;
struct cvs_flist dirs;
ndirs = 0;
TAILQ_INIT(&dirs);
cdp = cf->cf_ddat;
cdp->cd_root = cvsroot_get(cf->cf_path);
if (cdp->cd_root == NULL) {
cvs_file_freedir(cdp);
return (-1);
}
if (flags & CF_MKADMIN)
cvs_mkadmin(cf, 0755);
/* if the CVS administrative directory exists, load the info */
snprintf(pbuf, sizeof(pbuf), "%s/" CVS_PATH_CVSDIR, cf->cf_path);
if ((stat(pbuf, &st) == 0) && S_ISDIR(st.st_mode)) {
if (cvs_readrepo(cf->cf_path, pbuf, sizeof(pbuf)) == 0) {
cdp->cd_repo = strdup(pbuf);
if (cdp->cd_repo == NULL) {
free(cdp);
return (-1);
}
}
cdp->cd_ent = cvs_ent_open(cf->cf_path, O_RDONLY);
}
fd = open(cf->cf_path, O_RDONLY);
if (fd == -1) {
cvs_log(LP_ERRNO, "failed to open `%s'", cf->cf_path);
cvs_file_freedir(cdp);
return (-1);
}
do {
ret = getdirentries(fd, fbuf, sizeof(fbuf), &base);
if (ret == -1) {
cvs_log(LP_ERRNO, "failed to get directory entries");
(void)close(fd);
cvs_file_freedir(cdp);
return (-1);
}
dp = fbuf;
ep = fbuf + (size_t)ret;
while (dp < ep) {
ent = (struct dirent *)dp;
dp += ent->d_reclen;
if ((flags & CF_IGNORE) && cvs_file_chkign(ent->d_name))
continue;
snprintf(pbuf, sizeof(pbuf), "%s/%s",
cf->cf_path, ent->d_name);
cfp = cvs_file_lget(pbuf, flags, cf);
if (cfp != NULL) {
if (cfp->cf_type == DT_DIR) {
TAILQ_INSERT_HEAD(&dirs, cfp, cf_list);
ndirs++;
}
else {
TAILQ_INSERT_HEAD(&(cdp->cd_files), cfp,
cf_list);
cdp->cd_nfiles++;
}
}
}
} while (ret > 0);
/* we can now close our Entries file */
if (cdp->cd_ent != NULL) {
cvs_ent_close(cdp->cd_ent);
cdp->cd_ent = NULL;
}
if (flags & CF_SORT) {
cvs_file_sort(&(cdp->cd_files), cdp->cd_nfiles);
cvs_file_sort(&dirs, ndirs);
}
TAILQ_FOREACH(cfp, &dirs, cf_list)
TAILQ_INSERT_TAIL(&(cdp->cd_files), cfp, cf_list);
cdp->cd_nfiles += ndirs;
(void)close(fd);
cf->cf_ddat = cdp;
return (0);
}
/*
* cvs_file_free()
*
* Free a cvs_file structure and its contents.
*/
void
cvs_file_free(CVSFILE *cf)
{
if (cf->cf_path != NULL)
free(cf->cf_path);
if (cf->cf_ddat != NULL)
cvs_file_freedir(cf->cf_ddat);
free(cf);
}
/*
* cvs_file_examine()
*
* Examine the contents of the CVS file structure <cf> with the function
* <exam>. The function is called for all subdirectories and files of the
* root file.
*/
int
cvs_file_examine(CVSFILE *cf, int (*exam)(CVSFILE *, void *), void *arg)
{
int ret;
CVSFILE *fp;
if (cf->cf_type == DT_DIR) {
ret = (*exam)(cf, arg);
TAILQ_FOREACH(fp, &(cf->cf_ddat->cd_files), cf_list) {
ret = cvs_file_examine(fp, exam, arg);
if (ret == -1)
break;
}
}
else
ret = (*exam)(cf, arg);
return (ret);
}
/*
* cvs_file_freedir()
*
* Free a cvs_dir structure and its contents.
*/
static void
cvs_file_freedir(struct cvs_dir *cd)
{
CVSFILE *cfp;
if (cd->cd_root != NULL)
cvsroot_free(cd->cd_root);
if (cd->cd_repo != NULL)
free(cd->cd_repo);
if (cd->cd_ent != NULL)
cvs_ent_close(cd->cd_ent);
while (!TAILQ_EMPTY(&(cd->cd_files))) {
cfp = TAILQ_FIRST(&(cd->cd_files));
TAILQ_REMOVE(&(cd->cd_files), cfp, cf_list);
cvs_file_free(cfp);
}
}
/*
* cvs_file_sort()
*
* Sort a list of cvs file structures according to their filename. The list
* <flp> is modified according to the sorting algorithm. The number of files
* in the list must be given by <nfiles>.
* Returns 0 on success, or -1 on failure.
*/
static int
cvs_file_sort(struct cvs_flist *flp, u_int nfiles)
{
int i;
size_t nb;
CVSFILE *cf, **cfvec;
cfvec = (CVSFILE **)calloc(nfiles, sizeof(CVSFILE *));
if (cfvec == NULL) {
cvs_log(LP_ERRNO, "failed to allocate sorting vector");
return (-1);
}
i = 0;
TAILQ_FOREACH(cf, flp, cf_list) {
if (i == (int)nfiles) {
cvs_log(LP_WARN, "too many files to sort");
/* rebuild the list and abort sorting */
while (--i >= 0)
TAILQ_INSERT_HEAD(flp, cfvec[i], cf_list);
free(cfvec);
return (-1);
}
cfvec[i++] = cf;
/* now unlink it from the list,
* we'll put it back in order later
*/
TAILQ_REMOVE(flp, cf, cf_list);
}
/* clear the list just in case */
TAILQ_INIT(flp);
nb = (size_t)i;
heapsort(cfvec, nb, sizeof(cf), cvs_file_cmp);
/* rebuild the list from the bottom up */
for (i = (int)nb - 1; i >= 0; i--)
TAILQ_INSERT_HEAD(flp, cfvec[i], cf_list);
free(cfvec);
return (0);
}
static int
cvs_file_cmp(const void *f1, const void *f2)
{
CVSFILE *cf1, *cf2;
cf1 = *(CVSFILE **)f1;
cf2 = *(CVSFILE **)f2;
return strcmp(cf1->cf_name, cf2->cf_name);
}
CVSFILE*
cvs_file_alloc(const char *path, u_int type)
{
size_t len;
char pbuf[MAXPATHLEN];
CVSFILE *cfp;
struct cvs_dir *ddat;
cfp = (CVSFILE *)malloc(sizeof(*cfp));
if (cfp == NULL) {
cvs_log(LP_ERRNO, "failed to allocate CVS file data");
return (NULL);
}
memset(cfp, 0, sizeof(*cfp));
/* ditch trailing slashes */
strlcpy(pbuf, path, sizeof(pbuf));
len = strlen(pbuf);
while (pbuf[len - 1] == '/')
pbuf[--len] = '\0';
cfp->cf_path = strdup(pbuf);
if (cfp->cf_path == NULL) {
free(cfp);
return (NULL);
}
cfp->cf_name = strrchr(cfp->cf_path, '/');
if (cfp->cf_name == NULL)
cfp->cf_name = cfp->cf_path;
else
cfp->cf_name++;
cfp->cf_type = type;
cfp->cf_cvstat = CVS_FST_UNKNOWN;
if (type == DT_DIR) {
ddat = (struct cvs_dir *)malloc(sizeof(*ddat));
if (ddat == NULL) {
cvs_file_free(cfp);
return (NULL);
}
memset(ddat, 0, sizeof(*ddat));
TAILQ_INIT(&(ddat->cd_files));
cfp->cf_ddat = ddat;
}
return (cfp);
}
/*
* cvs_file_lget()
*
* Get the file and link it with the parent right away.
*/
static CVSFILE*
cvs_file_lget(const char *path, int flags, CVSFILE *parent)
{
int cwd;
size_t len;
char buf[32];
struct stat st;
struct tm lmtm;
CVSFILE *cfp;
struct cvs_ent *ent;
ent = NULL;
if (strcmp(path, ".") == 0)
cwd = 1;
else
cwd = 0;
if (stat(path, &st) == -1) {
cvs_log(LP_ERRNO, "failed to stat %s", path);
return (NULL);
}
cfp = cvs_file_alloc(path, IFTODT(st.st_mode));
if (cfp == NULL) {
cvs_log(LP_ERRNO, "failed to allocate CVS file data");
return (NULL);
}
cfp->cf_parent = parent;
if ((parent != NULL) && (CVS_DIR_ENTRIES(parent) != NULL)) {
ent = cvs_ent_get(CVS_DIR_ENTRIES(parent), cfp->cf_name);
}
if (ent == NULL)
cfp->cf_cvstat = (cwd == 1) ?
CVS_FST_UPTODATE : CVS_FST_UNKNOWN;
else {
/* always show directories as up-to-date */
if (ent->ce_type == CVS_ENT_DIR)
cfp->cf_cvstat = CVS_FST_UPTODATE;
else if (rcsnum_cmp(ent->ce_rev, cvs_addedrev, 2) == 0)
cfp->cf_cvstat = CVS_FST_ADDED;
else {
/* check last modified time */
if ((gmtime_r((time_t *)&(st.st_mtime),
&lmtm) == NULL) ||
(asctime_r(&lmtm, buf) == NULL)) {
cvs_log(LP_ERR,
"failed to generate file timestamp");
/* fake an up to date file */
strlcpy(buf, ent->ce_timestamp, sizeof(buf));
}
len = strlen(buf);
if ((len > 0) && (buf[len - 1] == '\n'))
buf[--len] = '\0';
if (strcmp(buf, ent->ce_timestamp) == 0)
cfp->cf_cvstat = CVS_FST_UPTODATE;
else
cfp->cf_cvstat = CVS_FST_MODIFIED;
}
}
if ((cfp->cf_type == DT_DIR) && ((flags & CF_RECURSE) || cwd)) {
if ((flags & CF_KNOWN) && (cfp->cf_cvstat == CVS_FST_UNKNOWN)) {
}
else if (cvs_file_getdir(cfp, flags) < 0) {
cvs_file_free(cfp);
return (NULL);
}
}
return (cfp);
}