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| author | Ed Maste <emaste@FreeBSD.org> | 2021-05-25 18:25:18 +0000 |
|---|---|---|
| committer | Ed Maste <emaste@FreeBSD.org> | 2021-06-02 02:08:54 +0000 |
| commit | 5ceb90aa667afbd0941f045073d54aea35d40f1b (patch) | |
| tree | d6e3422151ee9859074f1bf1024a235e6f95e3ed /usr.bin/elfctl | |
| parent | ae23d302479c5276e4e0a36e6ba1e882dc6e9899 (diff) | |
| download | src-5ceb90aa667afbd0941f045073d54aea35d40f1b.tar.gz src-5ceb90aa667afbd0941f045073d54aea35d40f1b.zip | |
elfctl: avoid touching file if no change made
Suggested by: brooks
Reviewed by: brooks, markj
MFC after: 1 week
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D30452
(cherry picked from commit 3f2508b7f3855102abed99b846e30e728ba3d04d)
Diffstat (limited to 'usr.bin/elfctl')
| -rw-r--r-- | usr.bin/elfctl/elfctl.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/usr.bin/elfctl/elfctl.c b/usr.bin/elfctl/elfctl.c index bcdd1be394a9..04719b487613 100644 --- a/usr.bin/elfctl/elfctl.c +++ b/usr.bin/elfctl/elfctl.c @@ -288,7 +288,7 @@ convert_to_feature_val(char *feature_str, uint32_t *feature_val) static bool edit_file_features(Elf *elf, int phcount, int fd, char *val) { - uint32_t features; + uint32_t features, prev_features; uint64_t off; if (!get_file_features(elf, phcount, fd, &features, &off)) { @@ -296,8 +296,12 @@ edit_file_features(Elf *elf, int phcount, int fd, char *val) return (false); } + prev_features = features; if (!convert_to_feature_val(val, &features)) return (false); + /* Avoid touching file if no change. */ + if (features == prev_features) + return (true); if (lseek(fd, off, SEEK_SET) == -1 || write(fd, &features, sizeof(features)) < |