Preserve the right errno value when trying adjunct functions during

[rsync/rsync.git] / util.c

diff --git a/util.c b/util.c
index 2afb63e..c437517 100644 (file)
--- a/util.c
+++ b/util.c
@@ -275,38 +275,54 @@ int copy_file(const char *source, const char *dest, int ofd,
        int len;   /* Number of bytes read into `buf'. */
 
        if ((ifd = do_open(source, O_RDONLY, 0)) < 0) {
+               int save_errno = errno;
                rsyserr(FERROR_XFER, errno, "open %s", full_fname(source));
+               errno = save_errno;
                return -1;
        }
 
        if (ofd < 0) {
                if (robust_unlink(dest) && errno != ENOENT) {
+                       int save_errno = errno;
                        rsyserr(FERROR_XFER, errno, "unlink %s", full_fname(dest));
+                       errno = save_errno;
                        return -1;
                }
 
-               if ((ofd = do_open(dest, O_WRONLY | O_CREAT | O_TRUNC | O_EXCL, mode)) < 0
-                && (!create_bak_dir || errno != ENOENT || make_bak_dir(dest) < 0
-                 || (ofd = do_open(dest, O_WRONLY | O_CREAT | O_TRUNC | O_EXCL, mode)) < 0)) {
-                       rsyserr(FERROR_XFER, errno, "open %s", full_fname(dest));
-                       close(ifd);
-                       return -1;
+               if ((ofd = do_open(dest, O_WRONLY | O_CREAT | O_TRUNC | O_EXCL, mode)) < 0) {
+                       int save_errno = errno ? errno : EINVAL; /* 0 paranoia */
+                       if (create_bak_dir && errno == ENOENT && make_bak_dir(dest) == 0) {
+                               if ((ofd = do_open(dest, O_WRONLY | O_CREAT | O_TRUNC | O_EXCL, mode)) < 0)
+                                       save_errno = errno ? errno : save_errno;
+                               else
+                                       save_errno = 0;
+                       }
+                       if (save_errno) {
+                               rsyserr(FERROR_XFER, save_errno, "open %s", full_fname(dest));
+                               close(ifd);
+                               errno = save_errno;
+                               return -1;
+                       }
                }
        }
 
        while ((len = safe_read(ifd, buf, sizeof buf)) > 0) {
                if (full_write(ofd, buf, len) < 0) {
+                       int save_errno = errno;
                        rsyserr(FERROR_XFER, errno, "write %s", full_fname(dest));
                        close(ifd);
                        close(ofd);
+                       errno = save_errno;
                        return -1;
                }
        }
 
        if (len < 0) {
+               int save_errno = errno;
                rsyserr(FERROR_XFER, errno, "read %s", full_fname(source));
                close(ifd);
                close(ofd);
+               errno = save_errno;
                return -1;
        }
 
@@ -316,8 +332,10 @@ int copy_file(const char *source, const char *dest, int ofd,
        }
 
        if (close(ofd) < 0) {
+               int save_errno = errno;
                rsyserr(FERROR_XFER, errno, "close failed on %s",
                        full_fname(dest));
+               errno = save_errno;
                return -1;
        }
 
@@ -401,8 +419,11 @@ int robust_rename(const char *from, const char *to, const char *partialptr,
                switch (errno) {
 #ifdef ETXTBSY
                case ETXTBSY:
-                       if (robust_unlink(to) != 0)
+                       if (robust_unlink(to) != 0) {
+                               errno = ETXTBSY;
                                return -1;
+                       }
+                       errno = ETXTBSY;
                        break;
 #endif
                case EXDEV: