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src/t_immutable: add ftruncate to append only tests

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The truncate and ftruncate syscalls check the IS_APPEND() flag
in 2 different vfs code paths and I had to fix both in order to
fix overlayfs IS_APPEND() violations.

Add the ftruncate test to t_immutable, so overlay/030 can verify
the fix.

Signed-off-by: Amir Goldstein <amir73il@gmail.com>
Reviewed-by: Eryu Guan <eguan@redhat.com>
Signed-off-by: Eryu Guan <eguan@redhat.com>
This commit is contained in:
Amir Goldstein
2017-04-07 12:15:39 +03:00
committed by Eryu Guan
parent 941ea73ec3
commit a589a20840
1 changed files with 15 additions and 0 deletions
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src/t_immutable.c
+15
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@@ -891,6 +891,21 @@ static int test_append(const char *dir)
fail++;
}
errno = 0;
if ((fd = open(path, O_RDWR|O_APPEND)) == -1) {
fprintf(stderr, "open(%s, O_RDWR|O_APPEND) failed: %s\n", path, strerror(errno));
fail++;
} else {
if (ftruncate(fd, 0) != -1) {
fprintf(stderr, "ftruncate(%s, 0) did not fail\n", path);
fail++;
} else if (errno != EPERM) {
fprintf(stderr, "ftruncate(%s, 0) did not set errno == EPERM\n", path);
fail++;
}
close(fd);
}
errno = 0;
if (truncate(path, 0) != -1) {
fprintf(stderr, "truncate(%s, 0) did not fail\n", path);