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Test file metadata failure paths
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Co-authored-by: Andrew Kesterson <andrew@aklabs.net>
This commit is contained in:
Logikoma
2026-08-03 10:43:47 -04:00
parent 01034fc668
commit 15e9104d9e
3 changed files with 91 additions and 10 deletions
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32
src/stat.c
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@@ -1,6 +1,20 @@
/* sys/stat.h and sys/statvfs.h metadata wrappers. */
/*
* sys/stat.h and sys/statvfs.h metadata wrappers.
*
* These calls make information about a file or filesystem available only by a
* return value that must be checked alongside a caller-owned POSIX struct. The
* wrappers put failure in the return value, where AKERR_NOIGNORE prevents it
* from being silently dropped, while preserving the errno that distinguishes
* missing paths, inaccessible paths, and invalid descriptors. errno is cleared
* immediately before each libc call, so a broken libc that reports failure
* without setting errno is still an AKERR_IO failure rather than status 0.
*/
#include <akstdlib.h>
#include <errno.h>
#include <sys/stat.h>
#include <sys/statvfs.h>
#include "aksl_internal.h"
/*
@@ -41,8 +55,11 @@ akerr_ErrorContext AKERR_NOIGNORE *aksl_lstat(const char *pathname, struct stat
*/
akerr_ErrorContext AKERR_NOIGNORE *aksl_fstat(int fd, struct stat *dest)
{
PREPARE_ERROR(e); FAIL_ZERO_RETURN(e, dest, AKERR_NULLPOINTER, "fd=%d, dest=%p", fd, (void *)dest);
errno = 0; FAIL_NONZERO_RETURN(e, fstat(fd, dest), AKSL_ERRNO_OR(AKERR_IO), "fd=%d", fd); SUCCEED_RETURN(e);
PREPARE_ERROR(e);
FAIL_ZERO_RETURN(e, dest, AKERR_NULLPOINTER, "fd=%d, dest=%p", fd, (void *)dest);
errno = 0;
FAIL_NONZERO_RETURN(e, fstat(fd, dest), AKSL_ERRNO_OR(AKERR_IO), "fd=%d", fd);
SUCCEED_RETURN(e);
}
/*
@@ -57,7 +74,7 @@ akerr_ErrorContext AKERR_NOIGNORE *aksl_fstatat(int dirfd, const char *pathname,
FAIL_ZERO_RETURN(e, pathname, AKERR_NULLPOINTER, "dirfd=%d, pathname=%p, dest=%p", dirfd, (void *)pathname, (void *)dest);
FAIL_ZERO_RETURN(e, dest, AKERR_NULLPOINTER, "dirfd=%d, pathname=%p, dest=%p", dirfd, (void *)pathname, (void *)dest);
errno = 0;
FAIL_NONZERO_RETURN(e, fstatat(dirfd, pathname, dest, flags), AKSL_ERRNO_OR(AKERR_IO), "dirfd=%d pathname=%s flags=%d", dirfd, pathname, flags);
FAIL_NONZERO_RETURN(e, fstatat(dirfd, pathname, dest, flags), AKSL_ERRNO_OR(AKERR_IO), "dirfd=%d, pathname=%s, flags=0x%x", dirfd, pathname, flags);
SUCCEED_RETURN(e);
}
@@ -83,6 +100,9 @@ akerr_ErrorContext AKERR_NOIGNORE *aksl_statvfs(const char *path, struct statvfs
*/
akerr_ErrorContext AKERR_NOIGNORE *aksl_fstatvfs(int fd, struct statvfs *dest)
{
PREPARE_ERROR(e); FAIL_ZERO_RETURN(e, dest, AKERR_NULLPOINTER, "fd=%d, dest=%p", fd, (void *)dest);
errno = 0; FAIL_NONZERO_RETURN(e, fstatvfs(fd, dest), AKSL_ERRNO_OR(AKERR_IO), "fd=%d", fd); SUCCEED_RETURN(e);
PREPARE_ERROR(e);
FAIL_ZERO_RETURN(e, dest, AKERR_NULLPOINTER, "fd=%d, dest=%p", fd, (void *)dest);
errno = 0;
FAIL_NONZERO_RETURN(e, fstatvfs(fd, dest), AKSL_ERRNO_OR(AKERR_IO), "fd=%d", fd);
SUCCEED_RETURN(e);
}