/*
Copyright (C) Andrew Tridgell 1998
+ Copyright (C) 2002 by Martin Pool
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
-/*
- syscall wrappers to ensure that nothing gets done in dry_run mode
- */
+/**
+ * @file syscall.c
+ *
+ * Syscall wrappers to ensure that nothing gets done in dry_run mode
+ * and to handle system peculiarities.
+ **/
#include "rsync.h"
extern int dry_run;
+extern int read_only;
+extern int list_only;
+
+#define CHECK_RO if (read_only || list_only) {errno = EROFS; return -1;}
int do_unlink(char *fname)
{
if (dry_run) return 0;
+ CHECK_RO
return unlink(fname);
}
int do_symlink(char *fname1, char *fname2)
{
if (dry_run) return 0;
+ CHECK_RO
return symlink(fname1, fname2);
}
int do_link(char *fname1, char *fname2)
{
if (dry_run) return 0;
+ CHECK_RO
return link(fname1, fname2);
}
#endif
int do_lchown(const char *path, uid_t owner, gid_t group)
{
if (dry_run) return 0;
+ CHECK_RO
return lchown(path, owner, group);
}
int do_mknod(char *pathname, mode_t mode, dev_t dev)
{
if (dry_run) return 0;
+ CHECK_RO
return mknod(pathname, mode, dev);
}
#endif
int do_rmdir(char *pathname)
{
if (dry_run) return 0;
+ CHECK_RO
return rmdir(pathname);
}
int do_open(char *pathname, int flags, mode_t mode)
{
- if (dry_run) return -1;
+ if (flags != O_RDONLY) {
+ if (dry_run) return -1;
+ CHECK_RO
+ }
+#ifdef O_BINARY
+ /* for Windows */
+ flags |= O_BINARY;
+#endif
+ /* some systems can't handle a double / */
+ if (pathname[0] == '/' && pathname[1] == '/') pathname++;
+
return open(pathname, flags, mode);
}
int do_chmod(const char *path, mode_t mode)
{
if (dry_run) return 0;
+ CHECK_RO
return chmod(path, mode);
}
#endif
int do_rename(char *fname1, char *fname2)
{
if (dry_run) return 0;
+ CHECK_RO
return rename(fname1, fname2);
}
+
+void trim_trailing_slashes(char *name)
+{
+ int l;
+ /* Some BSD systems cannot make a directory if the name
+ * contains a trailing slash.
+ * <http://www.opensource.apple.com/bugs/X/BSD%20Kernel/2734739.html> */
+
+ /* Don't change empty string; and also we can't improve on
+ * "/" */
+
+ l = strlen(name);
+ while (l > 1) {
+ if (name[--l] != '/')
+ break;
+ name[l] = '\0';
+ }
+}
+
+
int do_mkdir(char *fname, mode_t mode)
{
- if (dry_run) return 0;
+ if (dry_run)
+ return 0;
+ CHECK_RO;
+ trim_trailing_slashes(fname);
return mkdir(fname, mode);
}
-char *do_mktemp(char *template)
+
+/* like mkstemp but forces permissions */
+int do_mkstemp(char *template, mode_t perms)
{
- if (dry_run) return NULL;
- return mktemp(template);
+ if (dry_run) return -1;
+ if (read_only) {errno = EROFS; return -1;}
+
+#if defined(HAVE_SECURE_MKSTEMP) && defined(HAVE_FCHMOD)
+ {
+ int fd = mkstemp(template);
+ if (fd == -1) return -1;
+ if (fchmod(fd, perms) != 0) {
+ close(fd);
+ unlink(template);
+ return -1;
+ }
+ return fd;
+ }
+#else
+ if (!mktemp(template)) return -1;
+ return do_open(template, O_RDWR|O_EXCL|O_CREAT, perms);
+#endif
}
int do_stat(const char *fname, STRUCT_STAT *st)
#endif
}
+#if SUPPORT_LINKS
int do_lstat(const char *fname, STRUCT_STAT *st)
{
#if HAVE_OFF64_T
return lstat(fname, st);
#endif
}
+#endif
int do_fstat(int fd, STRUCT_STAT *st)
{
return fstat(fd, st);
#endif
}
+
+OFF_T do_lseek(int fd, OFF_T offset, int whence)
+{
+#if HAVE_OFF64_T
+ off64_t lseek64();
+ return lseek64(fd, offset, whence);
+#else
+ return lseek(fd, offset, whence);
+#endif
+}
+
+#ifdef USE_MMAP
+void *do_mmap(void *start, int len, int prot, int flags, int fd, OFF_T offset)
+{
+#if HAVE_OFF64_T
+ return mmap64(start, len, prot, flags, fd, offset);
+#else
+ return mmap(start, len, prot, flags, fd, offset);
+#endif
+}
+#endif
+
+char *d_name(struct dirent *di)
+{
+#if HAVE_BROKEN_READDIR
+ return (di->d_name - 2);
+#else
+ return di->d_name;
+#endif
+}