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gen_init_cpio: Ignore fsync() returning EINVAL on pipes

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The reproducer:
echo | ./usr/gen_init_cpio /dev/stdin > /dev/null

fsync() on a pipe fd returns -EINVAL, which makes gen_init_cpio fail.
Ignore -EINVAL from fsync().

Fixes: ae18b94099 ("gen_init_cpio: support -o <output_file> parameter")
Cc: David Disseldorp <ddiss@suse.de>
Cc: Nicolas Schier <nsc@kernel.org>
Signed-off-by: Dmitry Safonov <dima@arista.com>
Reviewed-by: David Disseldorp <ddiss@suse.de>
Link: https://patch.msgid.link/20251007-gen_init_cpio-pipe-v2-1-b098ab94b58a@arista.com
Signed-off-by: Nathan Chancellor <nathan@kernel.org>
This commit is contained in:
Dmitry Safonov
2025-10-07 04:46:47 +01:00
committed by Nathan Chancellor
parent 7ded7d37e5
commit 38492c5743
1 changed files with 4 additions and 1 deletions
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5
usr/gen_init_cpio.c
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@@ -112,7 +112,10 @@ static int cpio_trailer(void)
push_pad(padlen(offset, 512)) < 0)
return -1;
return fsync(outfd);
if (fsync(outfd) < 0 && errno != EINVAL)
return -1;
return 0;
}
static int cpio_mkslink(const char *name, const char *target,