Check if struct stat has mtim member

Not all libc's have a mtim member in struct stat (dietlibc doesn't).
Change ts_usec() to receive a struct stat as parameter and implement it
accordingly for both cases.

5 files changed, 11 insertions, 7 deletions

diff --git a/libkmod/libkmod-config.c b/libkmod/libkmod-config.c
index c1da16f..f970f9e 100644
--- a/libkmod/libkmod-config.c
+++ b/libkmod/libkmod-config.c
@@ -795,7 +795,7 @@ static int conf_files_list(struct kmod_ctx *ctx, struct kmod_list **list,
 		return err;
 	}
 
-	*path_stamp = ts_usec(&st.st_mtim);
+	*path_stamp = stat_mstamp(&st);
 
 	if (S_ISREG(st.st_mode)) {
 		conf_files_insert_sorted(ctx, list, path, NULL);
diff --git a/libkmod/libkmod-index.c b/libkmod/libkmod-index.c
index 9d3b939..c1c3c99 100644
--- a/libkmod/libkmod-index.c
+++ b/libkmod/libkmod-index.c
@@ -830,7 +830,7 @@ struct index_mm *index_mm_open(struct kmod_ctx *ctx, const char *filename,
 	idx->ctx = ctx;
 	close(fd);
 
-	*stamp = ts_usec(&st.st_mtim);
+	*stamp = stat_mstamp(&st);
 
 	return idx;
 
diff --git a/libkmod/libkmod-util.c b/libkmod/libkmod-util.c
index 7c2611b..9a662b6 100644
--- a/libkmod/libkmod-util.c
+++ b/libkmod/libkmod-util.c
@@ -341,8 +341,12 @@ char *path_make_absolute_cwd(const char *p)
 
 #define USEC_PER_SEC  1000000ULL
 #define NSEC_PER_USEC 1000ULL
-unsigned long long ts_usec(const struct timespec *ts)
+unsigned long long stat_mstamp(const struct stat *st)
 {
-	return (unsigned long long) ts->tv_sec * USEC_PER_SEC +
-	       (unsigned long long) ts->tv_nsec / NSEC_PER_USEC;
+#ifdef HAVE_STRUCT_STAT_ST_MTIM
+	return (unsigned long long) st->st_mtim.tv_sec * USEC_PER_SEC +
+	       (unsigned long long) st->st_mtim.tv_nsec / NSEC_PER_USEC;
+#else
+	return (unsigned long long) st->st_mtime;
+#endif
 }
diff --git a/libkmod/libkmod-util.h b/libkmod/libkmod-util.h
index c9a1a21..317b2f7 100644
--- a/libkmod/libkmod-util.h
+++ b/libkmod/libkmod-util.h
@@ -24,6 +24,6 @@ char *path_make_absolute_cwd(const char *p) __must_check __attribute__((nonnull(
 int alias_normalize(const char *alias, char buf[PATH_MAX], size_t *len) __must_check __attribute__((nonnull(1,2)));
 char *modname_normalize(const char *modname, char buf[PATH_MAX], size_t *len) __attribute__((nonnull(1, 2)));
 char *path_to_modname(const char *path, char buf[PATH_MAX], size_t *len) __attribute__((nonnull(2)));
-unsigned long long ts_usec(const struct timespec *ts);
+unsigned long long stat_mstamp(const struct stat *st);
 
 #endif
diff --git a/libkmod/libkmod.c b/libkmod/libkmod.c
index 91fdf7b..5edd594 100644
--- a/libkmod/libkmod.c
+++ b/libkmod/libkmod.c
@@ -620,7 +620,7 @@ static bool is_cache_invalid(const char *path, unsigned long long stamp)
 	if (stat(path, &st) < 0)
 		return true;
 
-	if (stamp != ts_usec(&st.st_mtim))
+	if (stamp != stat_mstamp(&st))
 		return true;
 
 	return false;