diff options
| author | Leah Rowe <leah@libreboot.org> | 2026-03-16 21:46:06 +0000 |
|---|---|---|
| committer | Leah Rowe <leah@libreboot.org> | 2026-03-26 06:59:42 +0000 |
| commit | c6ae1d5ea25ed266ee2bda924179ec715c99e762 (patch) | |
| tree | fe049e031c3c6070d4fb767189c551e3d1ba8e00 /util | |
| parent | 6e6ab09cb034afb6f96eefc781f891db5fb98e91 (diff) | |
comment
also improved the macro, making it stricter
Signed-off-by: Leah Rowe <leah@libreboot.org>
Diffstat (limited to 'util')
| -rw-r--r-- | util/nvmutil/nvmutil.c | 20 |
1 files changed, 17 insertions, 3 deletions
diff --git a/util/nvmutil/nvmutil.c b/util/nvmutil/nvmutil.c index 5401c2eb..10b42598 100644 --- a/util/nvmutil/nvmutil.c +++ b/util/nvmutil/nvmutil.c @@ -714,11 +714,25 @@ ino_t tmp_ino; int tmp_fd = -1; char *tname = NULL; +/* + * Used for checking whether. + * a file is a file via stat(). + * + * Portable macro for compatibility + * with older unix e.g. v7 unix (has S_IFREG), + * 4.2bsd (has S_IFMT) or POSIX (has S_ISREG) + * + * Fallback works where S_IFREG == 0100000 + * (classic unix bitmask) + */ + #ifndef S_ISREG -#ifdef S_IFMT -#define S_ISREG(m) (((m) & (S_IFMT)) == (S_IFREG)) +#if defined(S_IFMT) && defined(S_IFREG) +#define S_ISREG(m) (((m) & S_IFMT) == S_IFREG) +#elif defined(S_IFREG) +#define S_ISREG(m) (((m) & S_IFREG) != 0) #else -#define S_ISREG(m) (((m) & (S_IFREG)) == (S_IFREG)) +#error "can't determine types with stat()" #endif #endif |