embedaddon/rsync/syscall.c - diff

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Diff for /embedaddon/rsync/syscall.c between versions 1.1.1.1 and 1.1.1.3

-version 1.1.1.1, 2012/02/17 15:09:30
+version 1.1.1.3, 2016/11/01 09:54:32
  Line 4
   *
   * Copyright (C) 1998 Andrew Tridgell
   * Copyright (C) 2002 Martin Pool
- * Copyright (C) 2003-2009 Wayne Davison
+ * Copyright (C) 2003-2015 Wayne Davison
   *
   * 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
  Line 29
  #include <sys/attr.h>
  #endif
+ #if defined HAVE_SYS_FALLOCATE && !defined HAVE_FALLOCATE
+ #include <sys/syscall.h>
+ #endif
  extern int dry_run;
  extern int am_root;
+ extern int am_sender;
  extern int read_only;
  extern int list_only;
  extern int preserve_perms;
- Line 53  int do_unlink(const char *fname)
+ Line 58  int do_unlink(const char *fname)
          return unlink(fname);
  }
-int do_symlink(const char *fname1, const char *fname2)
+#ifdef SUPPORT_LINKS
+int do_symlink(const char *lnk, const char *fname)
  {
          if (dry_run) return 0;
          RETURN_ERROR_IF_RO_OR_LO;
-        return symlink(fname1, fname2);
+#if defined NO_SYMLINK_XATTRS || defined NO_SYMLINK_USER_XATTRS
+        /* For --fake-super, we create a normal file with mode 0600
+         * and write the lnk into it. */
+        if (am_root < 0) {
+                int ok, len = strlen(lnk);
+                int fd = open(fname, O_WRONLY|O_CREAT|O_TRUNC, S_IWUSR|S_IRUSR);
+                if (fd < 0)
+                        return -1;
+                ok = write(fd, lnk, len) == len;
+                if (close(fd) < 0)
+                        ok = 0;
+                return ok ? 0 : -1;
+        }
+#endif
+        return symlink(lnk, fname);
  }
+ #if defined NO_SYMLINK_XATTRS || defined NO_SYMLINK_USER_XATTRS
+ ssize_t do_readlink(const char *path, char *buf, size_t bufsiz)
+ {
+         /* For --fake-super, we read the link from the file. */
+         if (am_root < 0) {
+                 int fd = do_open_nofollow(path, O_RDONLY);
+                 if (fd >= 0) {
+                         int len = read(fd, buf, bufsiz);
+                         close(fd);
+                         return len;
+                 }
+                 if (errno != ELOOP)
+                         return -1;
+                 /* A real symlink needs to be turned into a fake one on the receiving
+                  * side, so tell the generator that the link has no length. */
+                 if (!am_sender)
+                         return 0;
+                 /* Otherwise fall through and let the sender report the real length. */
+         }
+         return readlink(path, buf, bufsiz);
+ }
+ #endif
+ #endif
  #ifdef HAVE_LINK
  int do_link(const char *fname1, const char *fname2)
  {
- Line 100  int do_mknod(const char *pathname, mode_t mode, dev_t
+ Line 147  int do_mknod(const char *pathname, mode_t mode, dev_t
          if (S_ISSOCK(mode)) {
                  int sock;
                  struct sockaddr_un saddr;
+                 unsigned int len = strlcpy(saddr.sun_path, pathname, sizeof saddr.sun_path);
+                 if (len >= sizeof saddr.sun_path) {
+                         errno = ENAMETOOLONG;
+                         return -1;
+                 }
  #ifdef HAVE_SOCKADDR_UN_LEN
-                unsigned int len =
+                saddr.sun_len = len + 1;
  #endif
-                     strlcpy(saddr.sun_path, pathname, sizeof saddr.sun_path);
- #ifdef HAVE_SOCKADDR_UN_LEN
-                 saddr.sun_len = len >= sizeof saddr.sun_path
-                               ? sizeof saddr.sun_path : len + 1;
- #endif
                  saddr.sun_family = AF_UNIX;
                  if ((sock = socket(PF_UNIX, SOCK_STREAM, 0)) < 0
- Line 374  int do_utime(const char *fname, time_t modtime, UNUSED
+ Line 421  int do_utime(const char *fname, time_t modtime, UNUSED
  #else
  #error Need utimes or utime function.
  #endif
+ #ifdef SUPPORT_PREALLOCATION
+ int do_fallocate(int fd, OFF_T offset, OFF_T length)
+ {
+ #ifdef FALLOC_FL_KEEP_SIZE
+ #define DO_FALLOC_OPTIONS FALLOC_FL_KEEP_SIZE
+ #else
+ #define DO_FALLOC_OPTIONS 0
+ #endif
+         RETURN_ERROR_IF(dry_run, 0);
+         RETURN_ERROR_IF_RO_OR_LO;
+ #if defined HAVE_FALLOCATE
+         return fallocate(fd, DO_FALLOC_OPTIONS, offset, length);
+ #elif defined HAVE_SYS_FALLOCATE
+         return syscall(SYS_fallocate, fd, DO_FALLOC_OPTIONS, (loff_t)offset, (loff_t)length);
+ #elif defined HAVE_EFFICIENT_POSIX_FALLOCATE
+         return posix_fallocate(fd, offset, length);
+ #else
+ #error Coding error in SUPPORT_PREALLOCATION logic.
+ #endif
+ }
+ #endif
+ int do_open_nofollow(const char *pathname, int flags)
+ {
+ #ifndef O_NOFOLLOW
+         STRUCT_STAT f_st, l_st;
+ #endif
+         int fd;
+         if (flags != O_RDONLY) {
+                 RETURN_ERROR_IF(dry_run, 0);
+                 RETURN_ERROR_IF_RO_OR_LO;
+ #ifndef O_NOFOLLOW
+                 /* This function doesn't support write attempts w/o O_NOFOLLOW. */
+                 errno = EINVAL;
+                 return -1;
+ #endif
+         }
+ #ifdef O_NOFOLLOW
+         fd = open(pathname, flags|O_NOFOLLOW);
+ #else
+         if (do_lstat(pathname, &l_st) < 0)
+                 return -1;
+         if (S_ISLNK(l_st.st_mode)) {
+                 errno = ELOOP;
+                 return -1;
+         }
+         if ((fd = open(pathname, flags)) < 0)
+                 return fd;
+         if (do_fstat(fd, &f_st) < 0) {
+           close_and_return_error:
+                 {
+                         int save_errno = errno;
+                         close(fd);
+                         errno = save_errno;
+                 }
+                 return -1;
+         }
+         if (l_st.st_dev != f_st.st_dev || l_st.st_ino != f_st.st_ino) {
+                 errno = EINVAL;
+                 goto close_and_return_error;
+         }
+ #endif
+         return fd;
+ }

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Removed from v.1.1.1.1
changed lines
	Added in v.1.1.1.3