File: [local] / src / usr.bin / cvs / file.c (download)
Revision 1.1, Wed Jul 14 03:33:09 2004 UTC (19 years, 11 months ago) by jfb
Branch: MAIN
cvsignore support and simpler API for file access
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/* $OpenBSD: file.c,v 1.1 2004/07/14 03:33:09 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"
#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
};
TAILQ_HEAD(, cvs_ignpat) cvs_ign_pats;
/*
* 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);
/* standard patterns to ignore */
for (i = 0; i < 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_isignored()
*
* Returns 1 if the filename <file> is matched by one of the ignore
* patterns, or 0 otherwise.
*/
int
cvs_file_isignored(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_getv()
*
* Get a vector of all the files found in the directory <dir> and not
* matching any of the ignore patterns. The number of files found is
* returned in <nfiles>.
* Returns a pointer to a dynamically-allocated string vector on success,
* or NULL on failure.
*/
char**
cvs_file_getv(const char *dir, int *nfiles)
{
int nf, ret, fd;
long base;
void *dp, *ep, *tmp;
char fbuf[1024], **fvec;
struct dirent *ent;
*nfiles = 0;
fvec = NULL;
fd = open(dir, O_RDONLY);
if (fd == -1) {
cvs_log(LP_ERRNO, "failed to open `%s'", dir);
return (NULL);
}
ret = getdirentries(fd, fbuf, sizeof(fbuf), &base);
if (ret == -1) {
cvs_log(LP_ERRNO, "failed to get directory entries");
(void)close(fd);
return (NULL);
}
dp = fbuf;
ep = fbuf + (size_t)ret;
while (dp < ep) {
ent = (struct dirent *)dp;
dp += ent->d_reclen;
if (cvs_file_isignored(ent->d_name))
continue;
tmp = realloc(fvec, (*nfiles + 1) * sizeof(char *));
if (tmp == NULL) {
cvs_log(LP_ERRNO, "failed to reallocate file vector");
(void)close(fd);
free(fvec);
return (NULL);
}
fvec[++(*nfiles)] = strdup(ent->d_name);
*nfiles++;
}
(void)close(fd);
return (fvec);
}
/*
* cvs_file_freev()
*
* Free a file vector obtained with cvs_file_getv().
*/
void
cvs_file_freev(char **fvec, int nfiles)
{
int i;
for (i = 0; i < nfiles; i++)
free(fvec[i]);
free(fvec);
}