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util/nvmutil: reset errno on successful file reads

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a non-fatal error could have set errno. when we return
from check_read_or_die(), it should be assumed that
all is well.

i don't think this would mask anything important, but
it may be regarded as a preventative bug fix, since
it most likely only prevents false-positives.

Signed-off-by: Leah Rowe <leah@libreboot.org>
This commit is contained in:
Leah Rowe
2026-03-04 00:52:40 +00:00
parent 6e08614e69
commit 3d27c77a63
1 changed files with 3 additions and 1 deletions
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util/nvmutil/nvmutil.c
+3 -1
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@@ -432,8 +432,10 @@ static int
check_read_or_die(const char *rpath, ssize_t rval, size_t rsize, check_read_or_die(const char *rpath, ssize_t rval, size_t rsize,
int retry, const char *readtype) int retry, const char *readtype)
{ {
if (rval == (ssize_t) rsize) if (rval == (ssize_t) rsize) {
errno = 0;
return 1; /* Successful read */ return 1; /* Successful read */
}
if (rval != -1) if (rval != -1)
err(ECANCELED, "Short %s, %zd bytes, on file: %s", err(ECANCELED, "Short %s, %zd bytes, on file: %s",