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| author | Paul Eggert <eggert@cs.ucla.edu> | 2022-01-10 10:34:09 -0800 |
|---|---|---|
| committer | Paul Eggert <eggert@cs.ucla.edu> | 2022-01-10 10:38:04 -0800 |
| commit | 66c5e7dd3aa58bde7a928867a763bf7e11206c93 (patch) | |
| tree | f07d59cdd9ecdc80e75615006da012175eab2d5c /lib/backupfile.c | |
| parent | 8d8e9c85c1e017537b36453b4ed559fdd98483bf (diff) | |
| download | gnulib-66c5e7dd3aa58bde7a928867a763bf7e11206c93.tar.gz | |
backupfile: fix bug when renaming not from wd
* lib/backupfile.c (backupfile_internal): Fix bug when DIR_FD
does not specify the working directory, and when RENAME.
Without the bug fix, FILE is treated as relative to the working
directory, not relative to DIR_FD, when renaming FILE.
This bug was introduced when DIR_FD and RENAME were introduced,
in 2018-10-24T02:10:21Z!eggert@cs.ucla.edu.
While we’re at it, when SDIR is nonnegative improve performance a
bit by passing an SDIR-relative old name to renameatu.
Diffstat (limited to 'lib/backupfile.c')
| -rw-r--r-- | lib/backupfile.c | 11 |
1 files changed, 4 insertions, 7 deletions
diff --git a/lib/backupfile.c b/lib/backupfile.c index ac4b0f4677..1e9290a187 100644 --- a/lib/backupfile.c +++ b/lib/backupfile.c @@ -332,7 +332,7 @@ backupfile_internal (int dir_fd, char const *file, return s; DIR *dirp = NULL; - int sdir = -1; + int sdir = AT_FDCWD; idx_t base_max = 0; while (true) { @@ -371,13 +371,10 @@ backupfile_internal (int dir_fd, char const *file, if (! rename) break; - if (sdir < 0) - { - sdir = AT_FDCWD; - base_offset = 0; - } + int olddirfd = sdir < 0 ? dir_fd : sdir; + idx_t offset = sdir < 0 ? 0 : base_offset; unsigned flags = backup_type == simple_backups ? 0 : RENAME_NOREPLACE; - if (renameatu (AT_FDCWD, file, sdir, s + base_offset, flags) == 0) + if (renameatu (olddirfd, file + offset, sdir, s + offset, flags) == 0) break; int e = errno; if (! (e == EEXIST && extended)) |