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selftests/nolibc: prepare: create /dev/zero

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/dev/zero is commonly used to allocate anonymous memory, it is a very
good file for tests, let's prepare it.

Suggested-by: Willy Tarreau <w@1wt.eu>
Link: https://lore.kernel.org/lkml/20230702193306.GK16233@1wt.eu/
Signed-off-by: Zhangjin Wu <falcon@tinylab.org>
Signed-off-by: Willy Tarreau <w@1wt.eu>
This commit is contained in:
Zhangjin Wu 2023-07-07 23:02:16 +08:00 • committed by Willy Tarreau
parent 938b5b9833
commit 82e339c230
1 changed files with 3 additions and 1 deletions
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4
tools/testing/selftests/nolibc/nolibc-test.c
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@ -894,11 +894,13 @@ int prepare(void)
*/
if (stat("/dev/.", &stat_buf) == 0 || mkdir("/dev", 0755) == 0) {
if (stat("/dev/console", &stat_buf) != 0 ||
stat("/dev/null", &stat_buf) != 0) {
stat("/dev/null", &stat_buf) != 0 ||
stat("/dev/zero", &stat_buf) != 0) {
/* try devtmpfs first, otherwise fall back to manual creation */
if (mount("/dev", "/dev", "devtmpfs", 0, 0) != 0) {
mknod("/dev/console", 0600 | S_IFCHR, makedev(5, 1));
mknod("/dev/null", 0666 | S_IFCHR, makedev(1, 3));
mknod("/dev/zero", 0666 | S_IFCHR, makedev(1, 5));
}
}
}