mirror of
https://github.com/systemd/systemd.git
synced 2024-11-13 23:21:08 +03:00
4a62c710b6
Using the same scripts as in f647962d64 "treewide: yet more log_*_errno
+ return simplifications".
109 lines
3.8 KiB
C
109 lines
3.8 KiB
C
/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
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/***
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This file is part of systemd.
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Copyright 2014 Kay Sievers
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systemd is free software; you can redistribute it and/or modify it
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under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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systemd is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with systemd; If not, see <http://www.gnu.org/licenses/>.
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***/
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#include <errno.h>
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#include <sys/stat.h>
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#include <stdlib.h>
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#include <string.h>
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#include <assert.h>
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#include <unistd.h>
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#include "base-filesystem.h"
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#include "log.h"
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#include "macro.h"
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#include "strv.h"
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#include "util.h"
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#include "label.h"
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#include "mkdir.h"
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typedef struct BaseFilesystem {
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const char *dir;
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mode_t mode;
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const char *target;
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const char *exists;
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} BaseFilesystem;
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static const BaseFilesystem table[] = {
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{ "bin", 0, "usr/bin\0", NULL },
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{ "lib", 0, "usr/lib\0", NULL },
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{ "root", 0755, NULL, NULL },
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{ "sbin", 0, "usr/sbin\0", NULL },
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#if defined(__i386__) || defined(__x86_64__)
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{ "lib64", 0, "usr/lib/x86_64-linux-gnu\0"
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"usr/lib64\0", "ld-linux-x86-64.so.2" },
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#endif
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};
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int base_filesystem_create(const char *root) {
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_cleanup_close_ int fd = -1;
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unsigned i;
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int r;
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fd = open(root, O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC|O_NOFOLLOW);
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if (fd < 0)
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return log_error_errno(errno, "Failed to open root file system: %m");
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for (i = 0; i < ELEMENTSOF(table); i ++) {
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if (faccessat(fd, table[i].dir, F_OK, AT_SYMLINK_NOFOLLOW) >= 0)
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continue;
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if (table[i].target) {
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const char *target = NULL, *s;
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/* check if one of the targets exists */
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NULSTR_FOREACH(s, table[i].target) {
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if (faccessat(fd, s, F_OK, AT_SYMLINK_NOFOLLOW) < 0)
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continue;
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/* check if a specific file exists at the target path */
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if (table[i].exists) {
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_cleanup_free_ char *p = NULL;
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p = strjoin(s, "/", table[i].exists, NULL);
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if (!p)
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return log_oom();
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if (faccessat(fd, p, F_OK, AT_SYMLINK_NOFOLLOW) < 0)
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continue;
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}
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target = s;
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break;
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}
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if (!target)
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continue;
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r = symlinkat(target, fd, table[i].dir);
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if (r < 0 && errno != EEXIST)
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return log_error_errno(errno, "Failed to create symlink at %s/%s: %m", root, table[i].dir);
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continue;
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}
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RUN_WITH_UMASK(0000)
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r = mkdirat(fd, table[i].dir, table[i].mode);
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if (r < 0 && errno != EEXIST)
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return log_error_errno(errno, "Failed to create directory at %s/%s: %m", root, table[i].dir);
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}
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return 0;
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}
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