void-packages/lib/remove.c

238 lines
5.7 KiB
C

/*-
* Copyright (c) 2009 Juan Romero Pardines.
* 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.
*
* 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 <stdio.h>
#include <stdbool.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <limits.h>
#include <unistd.h>
#include <fcntl.h>
#include <ctype.h>
#include <dirent.h>
#include <xbps_api.h>
int
xbps_unregister_pkg(const char *pkgname)
{
char *plist;
int rv = 0;
assert(pkgname != NULL);
plist = xbps_append_full_path(true, NULL, XBPS_REGPKGDB);
if (plist == NULL)
return EINVAL;
if (!xbps_remove_pkg_dict_from_file(pkgname, plist))
rv = errno;
free(plist);
return rv;
}
static int
xbps_remove_binary_pkg_meta(const char *pkgname, const char *destdir, int flags)
{
struct dirent *dp;
DIR *dirp;
char metadir[PATH_MAX - 1], path[PATH_MAX - 1];
int rv = 0;
assert(pkgname != NULL);
if (destdir == NULL)
destdir = "";
(void)snprintf(metadir, sizeof(metadir), "%s%s/metadata/%s",
destdir, XBPS_META_PATH, pkgname);
dirp = opendir(metadir);
if (dirp == NULL)
return errno;
while ((dp = readdir(dirp)) != NULL) {
if ((strcmp(dp->d_name, ".") == 0) ||
(strcmp(dp->d_name, "..") == 0))
continue;
if (snprintf(path, sizeof(path), "%s%s/metadata/%s/%s",
destdir, XBPS_META_PATH, pkgname, dp->d_name) < 0) {
(void)closedir(dirp);
return -1;
}
if ((rv = unlink(path)) == -1) {
if (flags & XBPS_UNPACK_VERBOSE)
printf("WARNING: can't remove %s (%s)\n",
pkgname, strerror(errno));
}
(void)memset(&path, 0, sizeof(path));
}
(void)closedir(dirp);
rv = rmdir(metadir);
return rv;
}
int
xbps_remove_binary_pkg(const char *pkgname, const char *destdir, int flags)
{
FILE *flist;
char path[PATH_MAX - 1], line[LINE_MAX - 1], *p, *buf;
int fd, rv = 0;
size_t len = 0;
bool prepostf = false;
assert(pkgname != NULL);
if (destdir == NULL)
destdir = "";
/* Check if pkg is installed */
if (xbps_check_is_installed_pkgname(pkgname) == false)
return ENOENT;
/*
* This length is '%s%s/metadata/%s/prepost-rm' not
* including nul.
*/
len = strlen(XBPS_META_PATH) + strlen(destdir) + strlen(pkgname) + 22;
buf = malloc(len + 1);
if (buf == NULL)
return errno;
if (snprintf(buf, len + 1, "%s%s/metadata/%s/prepost-rm",
destdir, XBPS_META_PATH, pkgname) < 0) {
free(buf);
return -1;
}
/* Find out if the prepost-rm file exists */
if ((fd = open(buf, O_RDONLY)) == -1) {
if (errno != ENOENT) {
rv = errno;
goto out;
}
} else {
/* Run the preremove action */
(void)close(fd);
prepostf = true;
if ((rv = xbps_file_exec(buf, destdir, "pre", pkgname,
NULL)) != 0) {
printf("%s: prerm action target error (%s)\n", pkgname,
strerror(errno));
goto out;
}
}
(void)snprintf(path, sizeof(path), "%s%s/metadata/%s/flist",
destdir, XBPS_META_PATH, pkgname);
if ((flist = fopen(path, "r")) == NULL) {
rv = errno;
goto out;
}
while (!feof(flist)) {
p = fgets(line, sizeof(line), flist);
if (p == NULL) {
if (feof(flist))
break;
if (ferror(flist)) {
rv = errno;
break;
}
}
if (strlen(line) == 0 || line[0] == '#' ||
isspace((unsigned char)line[0]) != 0)
continue;
len = strlen(line) + 1;
p = calloc(1, len);
if (p == NULL) {
rv = errno;
break;
}
(void)strncpy(p, line, len - 2);
(void)snprintf(path, sizeof(path), "%s%s",
destdir, p);
/*
* Remove the file or the directory if it's empty.
*/
if ((rv = unlink(path)) == -1) {
if (errno == EISDIR) {
if ((rv = rmdir(path)) == -1) {
if (errno == ENOTEMPTY) {
rv = 0;
goto next;
}
if (flags & XBPS_UNPACK_VERBOSE)
printf("WARNING: can't remove "
"directory %s (%s)\n",
path, strerror(errno));
goto next;
}
if (flags & XBPS_UNPACK_VERBOSE)
printf("Removed directory: %s\n", path);
goto next;
}
if (flags & XBPS_UNPACK_VERBOSE)
printf("WARNING: can't remove file %s (%s)\n", path,
strerror(errno));
goto next;
}
if (flags & XBPS_UNPACK_VERBOSE)
printf("Removed file: %s\n", path);
next:
free(p);
p = NULL;
}
(void)fclose(flist);
/* If successful, unregister pkg from db */
if (rv == 0) {
if (((rv = xbps_unregister_pkg(pkgname)) == 0) && prepostf) {
/* Run the postremove action target */
if ((rv = xbps_file_exec(buf, destdir, "post",
pkgname, NULL)) != 0) {
printf("%s: postrm action target error (%s)\n",
pkgname, strerror(errno));
}
}
}
out:
free(buf);
rv = xbps_remove_binary_pkg_meta(pkgname, destdir, flags);
return rv;
}