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cat: fallback on EISDIR with copy_file_range(2)

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The filesystem may support reading directories directly
when security.bsd.allow_read_dir is set.

MFC after:	1 week
PR:		275099
This commit is contained in:
Martin Matuska 2023-11-19 02:09:34 +01:00
parent 6000d46fc3
commit 3c773cad57
1 changed files with 2 additions and 1 deletions
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3
bin/cat/cat.c
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@ -281,7 +281,8 @@ scanfiles(char *argv[], int cooked __unused)
} else {
#ifndef BOOTSTRAP_CAT
if (in_kernel_copy(fd) == -1) {
if (errno == EINVAL || errno == EBADF)
if (errno == EINVAL || errno == EBADF ||
errno == EISDIR)
raw_cat(fd);
else
err(1, "stdout");