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00027 #include "rsync.h"
00028
00029 #if !defined MKNOD_CREATES_SOCKETS && defined HAVE_SYS_UN_H
00030 #include <sys/un.h>
00031 #endif
00032
00033 extern int dry_run;
00034 extern int read_only;
00035 extern int list_only;
00036 extern int preserve_perms;
00037
00038 #define RETURN_ERROR_IF(x,e) \
00039 do { \
00040 if (x) { \
00041 errno = (e); \
00042 return -1; \
00043 } \
00044 } while (0)
00045
00046 #define RETURN_ERROR_IF_RO_OR_LO RETURN_ERROR_IF(read_only || list_only, EROFS)
00047
00048 int do_unlink(const char *fname)
00049 {
00050 if (dry_run) return 0;
00051 RETURN_ERROR_IF_RO_OR_LO;
00052 return unlink(fname);
00053 }
00054
00055 int do_symlink(const char *fname1, const char *fname2)
00056 {
00057 if (dry_run) return 0;
00058 RETURN_ERROR_IF_RO_OR_LO;
00059 return symlink(fname1, fname2);
00060 }
00061
00062 #ifdef HAVE_LINK
00063 int do_link(const char *fname1, const char *fname2)
00064 {
00065 if (dry_run) return 0;
00066 RETURN_ERROR_IF_RO_OR_LO;
00067 return link(fname1, fname2);
00068 }
00069 #endif
00070
00071 int do_lchown(const char *path, uid_t owner, gid_t group)
00072 {
00073 if (dry_run) return 0;
00074 RETURN_ERROR_IF_RO_OR_LO;
00075 #ifndef HAVE_LCHOWN
00076 #define lchown chown
00077 #endif
00078 return lchown(path, owner, group);
00079 }
00080
00081 int do_mknod(char *pathname, mode_t mode, dev_t dev)
00082 {
00083 if (dry_run) return 0;
00084 RETURN_ERROR_IF_RO_OR_LO;
00085 #if !defined MKNOD_CREATES_FIFOS && defined HAVE_MKFIFO
00086 if (S_ISFIFO(mode))
00087 return mkfifo(pathname, mode);
00088 #endif
00089 #if !defined MKNOD_CREATES_SOCKETS && defined HAVE_SYS_UN_H
00090 if (S_ISSOCK(mode)) {
00091 int sock;
00092 struct sockaddr_un saddr;
00093 unsigned int len;
00094
00095 saddr.sun_family = AF_UNIX;
00096 len = strlcpy(saddr.sun_path, pathname, sizeof saddr.sun_path);
00097 #ifdef HAVE_SOCKADDR_UN_LEN
00098 saddr.sun_len = len >= sizeof saddr.sun_path
00099 ? sizeof saddr.sun_path : len + 1;
00100 #endif
00101
00102 if ((sock = socket(PF_UNIX, SOCK_STREAM, 0)) < 0
00103 || (unlink(pathname) < 0 && errno != ENOENT)
00104 || (bind(sock, (struct sockaddr*)&saddr, sizeof saddr)) < 0)
00105 return -1;
00106 close(sock);
00107 #ifdef HAVE_CHMOD
00108 return do_chmod(pathname, mode);
00109 #else
00110 return 0;
00111 #endif
00112 }
00113 #endif
00114 #ifdef HAVE_MKNOD
00115 return mknod(pathname, mode, dev);
00116 #else
00117 return -1;
00118 #endif
00119 }
00120
00121 int do_rmdir(const char *pathname)
00122 {
00123 if (dry_run) return 0;
00124 RETURN_ERROR_IF_RO_OR_LO;
00125 return rmdir(pathname);
00126 }
00127
00128 int do_open(const char *pathname, int flags, mode_t mode)
00129 {
00130 if (flags != O_RDONLY) {
00131 RETURN_ERROR_IF(dry_run, 0);
00132 RETURN_ERROR_IF_RO_OR_LO;
00133 }
00134
00135 return open(pathname, flags | O_BINARY, mode);
00136 }
00137
00138 #ifdef HAVE_CHMOD
00139 int do_chmod(const char *path, mode_t mode)
00140 {
00141 int code;
00142 if (dry_run) return 0;
00143 RETURN_ERROR_IF_RO_OR_LO;
00144 if (S_ISLNK(mode)) {
00145 #ifdef HAVE_LCHMOD
00146 code = lchmod(path, mode & CHMOD_BITS);
00147 #else
00148 code = 1;
00149 #endif
00150 } else
00151 code = chmod(path, mode & CHMOD_BITS);
00152 if (code != 0 && preserve_perms)
00153 return code;
00154 return 0;
00155 }
00156 #endif
00157
00158 int do_rename(const char *fname1, const char *fname2)
00159 {
00160 if (dry_run) return 0;
00161 RETURN_ERROR_IF_RO_OR_LO;
00162 return rename(fname1, fname2);
00163 }
00164
00165 void trim_trailing_slashes(char *name)
00166 {
00167 int l;
00168
00169
00170
00171
00172
00173
00174
00175 l = strlen(name);
00176 while (l > 1) {
00177 if (name[--l] != '/')
00178 break;
00179 name[l] = '\0';
00180 }
00181 }
00182
00183 int do_mkdir(char *fname, mode_t mode)
00184 {
00185 if (dry_run) return 0;
00186 RETURN_ERROR_IF_RO_OR_LO;
00187 trim_trailing_slashes(fname);
00188 return mkdir(fname, mode);
00189 }
00190
00191
00192 int do_mkstemp(char *template, mode_t perms)
00193 {
00194 RETURN_ERROR_IF(dry_run, 0);
00195 RETURN_ERROR_IF(read_only, EROFS);
00196
00197 #if defined HAVE_SECURE_MKSTEMP && defined HAVE_FCHMOD && (!defined HAVE_OPEN64 || defined HAVE_MKSTEMP64)
00198 {
00199 int fd = mkstemp(template);
00200 if (fd == -1)
00201 return -1;
00202 if (fchmod(fd, perms) != 0 && preserve_perms) {
00203 int errno_save = errno;
00204 close(fd);
00205 unlink(template);
00206 errno = errno_save;
00207 return -1;
00208 }
00209 #if defined HAVE_SETMODE && O_BINARY
00210 setmode(fd, O_BINARY);
00211 #endif
00212 return fd;
00213 }
00214 #else
00215 if (!mktemp(template))
00216 return -1;
00217 return do_open(template, O_RDWR|O_EXCL|O_CREAT, perms);
00218 #endif
00219 }
00220
00221 int do_stat(const char *fname, STRUCT_STAT *st)
00222 {
00223 #ifdef USE_STAT64_FUNCS
00224 return stat64(fname, st);
00225 #else
00226 return stat(fname, st);
00227 #endif
00228 }
00229
00230 int do_lstat(const char *fname, STRUCT_STAT *st)
00231 {
00232 #ifdef SUPPORT_LINKS
00233 # ifdef USE_STAT64_FUNCS
00234 return lstat64(fname, st);
00235 # else
00236 return lstat(fname, st);
00237 # endif
00238 #else
00239 return do_stat(fname, st);
00240 #endif
00241 }
00242
00243 int do_fstat(int fd, STRUCT_STAT *st)
00244 {
00245 #ifdef USE_STAT64_FUNCS
00246 return fstat64(fd, st);
00247 #else
00248 return fstat(fd, st);
00249 #endif
00250 }
00251
00252 OFF_T do_lseek(int fd, OFF_T offset, int whence)
00253 {
00254 #ifdef HAVE_LSEEK64
00255 #if !SIZEOF_OFF64_T
00256 OFF_T lseek64();
00257 #else
00258 off64_t lseek64();
00259 #endif
00260 return lseek64(fd, offset, whence);
00261 #else
00262 return lseek(fd, offset, whence);
00263 #endif
00264 }
00265
00266 char *d_name(struct dirent *di)
00267 {
00268 #ifdef HAVE_BROKEN_READDIR
00269 return (di->d_name - 2);
00270 #else
00271 return di->d_name;
00272 #endif
00273 }