File: [local] / src / usr.bin / cvs / entries.c (download)
Revision 1.6, Mon Jul 26 16:53:58 2004 UTC (19 years, 10 months ago) by jfb
Branch: MAIN
Changes since 1.5: +1 -1 lines
Fix pointer passed to fclose() in cvs_ent_close()
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/* $OpenBSD: entries.c,v 1.6 2004/07/26 16:53:58 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/param.h>
#include <sys/stat.h>
#include <stdio.h>
#include <fcntl.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include "log.h"
#include "cvs.h"
#define CVS_ENTRIES_NFIELDS 5
#define CVS_ENTRIES_DELIM '/'
static struct cvs_ent* cvs_ent_clone (const struct cvs_ent *);
/*
* cvs_ent_open()
*
* Open the CVS Entries file for the directory <dir>.
* Returns a pointer to the CVSENTRIES file structure on success, or NULL
* on failure.
*/
CVSENTRIES*
cvs_ent_open(const char *dir, int flags)
{
size_t len;
char entpath[MAXPATHLEN], ebuf[128], mode[4];
FILE *fp;
struct cvs_ent *ent;
CVSENTRIES *ep;
memset(mode, 0, sizeof(mode));
switch (flags & O_ACCMODE) {
case O_RDWR:
mode[1] = '+';
/* fallthrough */
case O_RDONLY:
mode[0] = 'r';
break;
case O_WRONLY:
mode[0] = 'w';
break;
}
snprintf(entpath, sizeof(entpath), "%s/" CVS_PATH_ENTRIES, dir);
fp = fopen(entpath, mode);
if (fp == NULL) {
cvs_log(LP_ERRNO, "cannot open CVS/Entries for reading",
entpath);
return (NULL);
}
ep = (CVSENTRIES *)malloc(sizeof(CVSENTRIES));
if (ep == NULL) {
cvs_log(LP_ERRNO, "failed to allocate Entries data");
(void)fclose(fp);
return (NULL);
}
memset(ep, 0, sizeof(*ep));
ep->cef_path = strdup(dir);
if (ep->cef_path == NULL) {
cvs_log(LP_ERRNO, "failed to copy Entries path");
free(ep);
(void)fclose(fp);
return (NULL);
}
ep->cef_cur = NULL;
TAILQ_INIT(&(ep->cef_ent));
while (fgets(ebuf, sizeof(ebuf), fp) != NULL) {
len = strlen(ebuf);
if ((len > 0) && (ebuf[len - 1] == '\n'))
ebuf[--len] = '\0';
ent = cvs_ent_parse(ebuf);
if (ent == NULL)
continue;
TAILQ_INSERT_TAIL(&(ep->cef_ent), ent, ce_list);
}
/* only keep a pointer to the open file if we're in writing mode */
if ((flags & O_WRONLY) || (flags & O_RDWR))
ep->cef_file = fp;
else
(void)fclose(fp);
return (ep);
}
/*
* cvs_ent_close()
*
* Close the Entries file <ep> and free all data. Any reference to entries
* structure within that file become invalid.
*/
void
cvs_ent_close(CVSENTRIES *ep)
{
struct cvs_ent *ent;
if (ep->cef_file != NULL)
(void)fclose(ep->cef_file);
if (ep->cef_path != NULL)
free(ep->cef_path);
while (!TAILQ_EMPTY(&(ep->cef_ent))) {
ent = TAILQ_FIRST(&(ep->cef_ent));
TAILQ_REMOVE(&(ep->cef_ent), ent, ce_list);
cvs_ent_free(ent);
}
free(ep);
}
/*
* cvs_ent_add()
*
* Add the entry <ent> to the Entries file <ef>.
*/
int
cvs_ent_add(CVSENTRIES *ef, struct cvs_ent *ent)
{
void *tmp;
if (ef->cef_file == NULL) {
cvs_log(LP_ERR, "Entries file is opened in read-only mode");
return (-1);
}
if (cvs_ent_get(ef, ent->ce_name) != NULL)
return (-1);
if (fseek(ef->cef_file, (long)0, SEEK_END) == -1) {
cvs_log(LP_ERRNO, "failed to seek to end of CVS/Entries file");
return (-1);
}
fprintf(ef->cef_file, "%s\n", ent->ce_line);
TAILQ_INSERT_TAIL(&(ef->cef_ent), ent, ce_list);
return (0);
}
/*
* cvs_ent_addln()
*
* Add a line to the Entries file.
*/
int
cvs_ent_addln(CVSENTRIES *ef, const char *line)
{
void *tmp;
struct cvs_ent *ent;
if (ef->cef_file == NULL) {
cvs_log(LP_ERR, "Entries file is opened in read-only mode");
return (-1);
}
ent = cvs_ent_parse(line);
if (ent == NULL)
return (-1);
if (cvs_ent_get(ef, ent->ce_name) != NULL)
return (-1);
TAILQ_INSERT_TAIL(&(ef->cef_ent), ent, ce_list);
return (0);
}
/*
* cvs_ent_get()
*
* Get the CVS entry from the Entries file <ef> whose 'name' portion matches
* <file>.
* Returns a pointer to the cvs entry structure on success, or NULL on failure.
*/
struct cvs_ent*
cvs_ent_get(CVSENTRIES *ef, const char *file)
{
u_int i;
struct cvs_ent *ep;
TAILQ_FOREACH(ep, &(ef->cef_ent), ce_list)
if (strcmp(ep->ce_name, file) == 0)
return (ep);
return (NULL);
}
/*
* cvs_ent_next()
*
* This function is used to iterate over the entries in an Entries file. The
* first call will return the first entry of the file and each subsequent call
* will return the entry following the last one returned.
* Returns a pointer to the cvs entry structure on success, or NULL on failure.
*/
struct cvs_ent*
cvs_ent_next(CVSENTRIES *ef)
{
if (ef->cef_cur == NULL)
ef->cef_cur = TAILQ_FIRST(&(ef->cef_ent));
else
ef->cef_cur = TAILQ_NEXT(ef->cef_cur, ce_list);
return (ef->cef_cur);
}
/*
* cvs_ent_parse()
*
* Parse a single line from a CVS/Entries file and return a cvs_entry structure
* containing all the parsed information.
*/
struct cvs_ent*
cvs_ent_parse(const char *entry)
{
int i;
char *fields[CVS_ENTRIES_NFIELDS], *sp, *dp;
struct cvs_ent *entp;
entp = (struct cvs_ent *)malloc(sizeof(*entp));
if (entp == NULL) {
cvs_log(LP_ERRNO, "failed to allocate CVS entry");
return (NULL);
}
memset(entp, 0, sizeof(*entp));
entp->ce_rev = rcsnum_alloc();
if (entp->ce_rev == NULL) {
free(entp);
return (NULL);
}
entp->ce_line = strdup(entry);
if (entp->ce_line == NULL) {
cvs_ent_free(entp);
return (NULL);
}
entp->ce_buf = strdup(entry);
if (entp->ce_buf == NULL) {
cvs_ent_free(entp);
return (NULL);
}
sp = entp->ce_buf;
if (*sp == CVS_ENTRIES_DELIM)
entp->ce_type = CVS_ENT_FILE;
else if (*sp == 'D') {
entp->ce_type = CVS_ENT_DIR;
sp++;
}
else {
/* unknown entry, ignore for future expansion */
entp->ce_type = CVS_ENT_NONE;
sp++;
}
sp++;
i = 0;
do {
dp = strchr(sp, CVS_ENTRIES_DELIM);
if (dp != NULL)
*(dp++) = '\0';
fields[i++] = sp;
sp = dp;
} while ((dp != NULL) && (i < CVS_ENTRIES_NFIELDS));
entp->ce_name = fields[0];
if (entp->ce_type == CVS_ENT_FILE) {
rcsnum_aton(fields[1], NULL, entp->ce_rev);
entp->ce_timestamp = fields[2];
entp->ce_opts = fields[3];
entp->ce_tag = fields[4];
}
return (entp);
}
/*
* cvs_ent_free()
*
* Free a single CVS entries structure.
*/
void
cvs_ent_free(struct cvs_ent *ent)
{
if (ent->ce_rev != NULL)
rcsnum_free(ent->ce_rev);
if (ent->ce_line != NULL)
free(ent->ce_line);
if (ent->ce_buf != NULL)
free(ent->ce_buf);
free(ent);
}
/*
* cvs_ent_getent()
*
* Get a single entry from the CVS/Entries file of the basename portion of
* path <path> and return that entry. That entry must later be freed using
* cvs_ent_free().
*/
struct cvs_ent*
cvs_ent_getent(const char *path)
{
char base[MAXPATHLEN], file[MAXPATHLEN];
CVSENTRIES *entf;
struct cvs_ent *ep;
cvs_splitpath(path, base, sizeof(base), file, sizeof(file));
entf = cvs_ent_open(base, O_RDONLY);
if (entf == NULL)
return (NULL);
ep = cvs_ent_get(entf, file);
if (ep != NULL) {
/* take it out of the queue so it doesn't get freed */
TAILQ_REMOVE(&(entf->cef_ent), ep, ce_list);
}
cvs_ent_close(entf);
return (ep);
}