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authorKay Sievers <kay.sievers@suse.de>2006-05-10 17:11:00 +0200
committerKay Sievers <kay.sievers@suse.de>2006-05-10 17:11:00 +0200
commit7331443248f516345551661faa16305e2963e3b7 (patch)
tree62d93e710a9b5e264cc4db9e7fe9881e53df6155 /extras/edd_id/edd_id.c
parentd7fea966f196e2eb5cd87b5e738bd4f39878c548 (diff)
edd_id: fix "(null)" output if "mbr_signature" does not exist
Diffstat (limited to 'extras/edd_id/edd_id.c')
-rw-r--r--extras/edd_id/edd_id.c32
1 files changed, 18 insertions, 14 deletions
diff --git a/extras/edd_id/edd_id.c b/extras/edd_id/edd_id.c
index 8fc690a49c..4ba89ede89 100644
--- a/extras/edd_id/edd_id.c
+++ b/extras/edd_id/edd_id.c
@@ -62,7 +62,7 @@ int main(int argc, char *argv[])
int sysfs_fd;
DIR *dir = NULL;
int rc = 1;
- char *match = NULL;
+ char match[NAME_MAX] = "";
logging_init("edd_id");
@@ -74,7 +74,7 @@ int main(int argc, char *argv[])
} else
node = arg;
}
- if (!node) {
+ if (node == NULL) {
err("no node specified");
fprintf(stderr, "no node specified\n");
goto exit;
@@ -82,7 +82,7 @@ int main(int argc, char *argv[])
/* check for kernel support */
dir = opendir("/sys/firmware/edd");
- if (!dir) {
+ if (dir == NULL) {
info("no kernel EDD support");
fprintf(stderr, "no kernel EDD support\n");
rc = 2;
@@ -156,32 +156,36 @@ int main(int argc, char *argv[])
size = read(sysfs_fd, sysfs_id_buf, sizeof(sysfs_id_buf)-1);
close(sysfs_fd);
- if (size < 0) {
+ if (size <= 0) {
info("read sysfs '%s' failed", file);
continue;
}
sysfs_id_buf[size] = '\0';
info("read '%s' from '%s'", sysfs_id_buf, file);
-
sysfs_id = strtoul(sysfs_id_buf, NULL, 16);
+
+ /* look for matching value, that appears only once */
if (disk_id == sysfs_id) {
- if (!match) {
- match = dent->d_name;
+ if (match[0] == '\0') {
+ /* store id */
+ strlcpy(match, dent->d_name, sizeof(match));
} else {
+ /* error, same signature for another device */
info("'%s' does not have a unique signature", node);
fprintf(stderr, "'%s' does not have a unique signature\n", node);
- rc=10;
+ rc = 10;
goto exit;
}
}
-
}
- if (export)
- printf("ID_EDD=%s\n", match);
- else
- printf("%s\n", match);
- rc = 0;
+ if (match[0] != '\0') {
+ if (export)
+ printf("ID_EDD=%s\n", match);
+ else
+ printf("%s\n", match);
+ rc = 0;
+ }
close:
close(disk_fd);