1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/librazor/atomic-none.c Thu Feb 09 20:45:27 2012 +0000
1.3 @@ -0,0 +1,249 @@
1.4 +/*
1.5 + * Copyright (C) 2011-2012 J. Ali Harlow <ali@juiblex.co.uk>
1.6 + *
1.7 + * This program is free software; you can redistribute it and/or modify
1.8 + * it under the terms of the GNU General Public License as published by
1.9 + * the Free Software Foundation; either version 2 of the License, or
1.10 + * (at your option) any later version.
1.11 + *
1.12 + * This program is distributed in the hope that it will be useful,
1.13 + * but WITHOUT ANY WARRANTY; without even the implied warranty of
1.14 + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
1.15 + * GNU General Public License for more details.
1.16 + *
1.17 + * You should have received a copy of the GNU General Public License along
1.18 + * with this program; if not, write to the Free Software Foundation, Inc.,
1.19 + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
1.20 + */
1.21 +
1.22 +#include "config.h"
1.23 +
1.24 +#if !ENABLE_ATOMIC
1.25 +
1.26 +#include <stdlib.h>
1.27 +#ifdef MSWIN_API
1.28 +#include <windows.h>
1.29 +#endif
1.30 +#include <stdio.h>
1.31 +#include <limits.h>
1.32 +#include <errno.h>
1.33 +#include <unistd.h>
1.34 +#include <fcntl.h>
1.35 +#include <sys/stat.h>
1.36 +#include <string.h>
1.37 +#include <assert.h>
1.38 +
1.39 +#include "razor.h"
1.40 +#include "razor-internal.h"
1.41 +
1.42 +#ifndef O_BINARY
1.43 +#define O_BINARY 0
1.44 +#endif
1.45 +
1.46 +RAZOR_EXPORT struct razor_atomic *
1.47 +razor_atomic_open(const char *description)
1.48 +{
1.49 + struct razor_atomic *atomic;
1.50 +
1.51 + atomic = zalloc(sizeof *atomic);
1.52 +
1.53 + return atomic;
1.54 +}
1.55 +
1.56 +RAZOR_EXPORT int
1.57 +razor_atomic_commit(struct razor_atomic *atomic)
1.58 +{
1.59 + return razor_atomic_in_error_state(atomic);
1.60 +}
1.61 +
1.62 +RAZOR_EXPORT void
1.63 +razor_atomic_destroy(struct razor_atomic *atomic)
1.64 +{
1.65 + free(atomic->error_path);
1.66 + free(atomic->error_str);
1.67 + free(atomic->error_msg);
1.68 + free(atomic);
1.69 +}
1.70 +
1.71 +RAZOR_EXPORT int
1.72 +razor_atomic_make_dirs(struct razor_atomic *atomic, const char *root,
1.73 + const char *path)
1.74 +{
1.75 + char buffer[PATH_MAX], *p;
1.76 + const char *slash, *next;
1.77 + struct stat buf;
1.78 +
1.79 + if (razor_atomic_in_error_state(atomic))
1.80 + return -1;
1.81 +
1.82 + strcpy(buffer, root);
1.83 + p = buffer + strlen(buffer);
1.84 + slash = path;
1.85 + for (slash = path; *slash != '\0'; slash = next) {
1.86 +#ifdef MSWIN_API
1.87 + next = strpbrk(slash + 1, "/\\");
1.88 +#else
1.89 + next = strchr(slash + 1, '/');
1.90 +#endif
1.91 + if (next == NULL)
1.92 + break;
1.93 +
1.94 + memcpy(p, slash, next - slash);
1.95 + p += next - slash;
1.96 + *p = '\0';
1.97 +
1.98 + if (razor_valid_root_name(buffer))
1.99 + continue;
1.100 +
1.101 + if (stat(buffer, &buf) == 0) {
1.102 + if (!S_ISDIR(buf.st_mode)) {
1.103 + razor_atomic_set_error_str(atomic, buffer,
1.104 + "Not a directory");
1.105 + return -1;
1.106 + }
1.107 + } else if (mkdir(buffer, 0777) < 0) {
1.108 + razor_atomic_set_error_str(atomic, buffer,
1.109 + strerror(errno));
1.110 + return -1;
1.111 + }
1.112 + }
1.113 +
1.114 + return 0;
1.115 +}
1.116 +
1.117 +RAZOR_EXPORT int
1.118 +razor_atomic_remove(struct razor_atomic *atomic, const char *path)
1.119 +{
1.120 +#ifdef MSWIN_API
1.121 + wchar_t *buf;
1.122 + DWORD err;
1.123 +#endif
1.124 +
1.125 + if (razor_atomic_in_error_state(atomic))
1.126 + return -1;
1.127 +
1.128 +#ifdef MSWIN_API
1.129 + buf = razor_utf8_to_utf16(path, -1);
1.130 +
1.131 + if (!DeleteFileW(buf)) {
1.132 + err = GetLastError();
1.133 + if (err != ERROR_FILE_NOT_FOUND &&
1.134 + err != ERROR_PATH_NOT_FOUND &&
1.135 + !(SetFileAttributesW(buf, FILE_ATTRIBUTE_NORMAL) &&
1.136 + DeleteFileW(buf)) &&
1.137 + !RemoveDirectoryW(buf) &&
1.138 + GetLastError() != ERROR_DIR_NOT_EMPTY)
1.139 + razor_atomic_set_error_mswin(atomic, buf, err);
1.140 + }
1.141 +
1.142 + free(buf);
1.143 +#else
1.144 + if (remove(path))
1.145 + razor_atomic_set_error_str(atomic, path, strerror(errno));
1.146 +#endif
1.147 +
1.148 + return !!atomic->error_str;
1.149 +}
1.150 +
1.151 +RAZOR_EXPORT int
1.152 +razor_atomic_rename_file(struct razor_atomic *atomic, const char *oldpath,
1.153 + const char *newpath)
1.154 +{
1.155 +#ifdef MSWIN_API
1.156 + wchar_t *oldbuf, *newbuf;
1.157 + const DWORD flags = MOVEFILE_COPY_ALLOWED | MOVEFILE_REPLACE_EXISTING;
1.158 +#endif
1.159 +
1.160 + if (razor_atomic_in_error_state(atomic))
1.161 + return -1;
1.162 +
1.163 +#ifdef MSWIN_API
1.164 + newbuf = razor_utf8_to_utf16(newpath, -1);
1.165 + oldbuf = razor_utf8_to_utf16(oldpath, -1);
1.166 +
1.167 + /*
1.168 + * Passing MOVEFILE_REPLACE_EXISTING to MoveFileEx() will
1.169 + * cover every case we care about _except_ replacing an empty
1.170 + * directory with a file. Calling RemoveDirectory() will deal
1.171 + * with this case while having no effect in all other cases.
1.172 + */
1.173 + (void)RemoveDirectoryW(newbuf);
1.174 +
1.175 + if (!MoveFileExW(oldbuf, newbuf, flags))
1.176 + razor_atomic_set_error_mswin(atomic, newbuf, GetLastError());
1.177 +
1.178 + free(newbuf);
1.179 + free(oldbuf);
1.180 +#else
1.181 + if (rename(oldpath, newpath))
1.182 + razor_atomic_set_error_str(atomic, newpath, strerror(errno));
1.183 +#endif
1.184 +
1.185 + return !!atomic->error_str;
1.186 +}
1.187 +
1.188 +RAZOR_EXPORT int
1.189 +razor_atomic_create_dir(struct razor_atomic *atomic, const char *dirname,
1.190 + mode_t mode)
1.191 +{
1.192 + if (razor_atomic_in_error_state(atomic))
1.193 + return -1;
1.194 +
1.195 + if (!mkdir(dirname, mode & (S_IRWXU | S_IRWXG | S_IRWXO)))
1.196 + return 0;
1.197 +
1.198 + if (errno != EEXIST) {
1.199 + razor_atomic_set_error_str(atomic, dirname, strerror(errno));
1.200 + return -1;
1.201 + }
1.202 +
1.203 + if (chmod(dirname, mode & (S_IRWXU | S_IRWXG | S_IRWXO)) < 0) {
1.204 + razor_atomic_set_error_str(atomic, dirname, strerror(errno));
1.205 + return -1;
1.206 + }
1.207 +
1.208 + return 0;
1.209 +}
1.210 +
1.211 +RAZOR_EXPORT int
1.212 +razor_atomic_create_symlink(struct razor_atomic *atomic, const char *target,
1.213 + const char *path)
1.214 +{
1.215 + if (razor_atomic_in_error_state(atomic))
1.216 + return -1;
1.217 +
1.218 +#if HAVE_SYMLINK
1.219 + if (symlink(target, path) < 0) {
1.220 + razor_atomic_set_error_str(atomic, NULL, strerror(errno));
1.221 + return -1;
1.222 + }
1.223 +
1.224 + return 0;
1.225 +#else
1.226 + razor_atomic_set_error_str(atomic, NULL, "Symbolic links not supported "
1.227 + "on this platform");
1.228 +
1.229 + return -1;
1.230 +#endif
1.231 +}
1.232 +
1.233 +RAZOR_EXPORT int
1.234 +razor_atomic_create_file(struct razor_atomic *atomic, const char *filename,
1.235 + mode_t mode)
1.236 +{
1.237 + int fd;
1.238 +
1.239 + if (razor_atomic_in_error_state(atomic))
1.240 + return -1;
1.241 +
1.242 + atomic->error_path = strdup(filename);
1.243 + fd = open(atomic->error_path, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY,
1.244 + mode & (S_IRWXU | S_IRWXG | S_IRWXO));
1.245 +
1.246 + if (fd == -1)
1.247 + razor_atomic_set_error_str(atomic, NULL, strerror(errno));
1.248 +
1.249 + return fd;
1.250 +}
1.251 +
1.252 +#endif /* !ENABLE_ATOMIC */