[Libguestfs] [PATCH] NFC: Cleanup iteration over fstab entries in inspect_fs_unix.c
Select non-comment labels using an augeas path to return the correct nodes in
the first instance, rather than applying a regular expression to all results.
Iterate over returned matches using a char** iterator.
Use asprintf() to ensure the path string buffer is the correct size.
---
src/inspect_fs_unix.c | 53 +++++++++++++++++++++++-------------------------
1 files changed, 25 insertions(+), 28 deletions(-)
diff --git a/src/inspect_fs_unix.c b/src/inspect_fs_unix.c
index 0fa3e83..69a2458 100644
--- a/src/inspect_fs_unix.c
+++ b/src/inspect_fs_unix.c
@@ -110,7 +110,6 @@ compile_regexps (void)
COMPILE (re_scientific_linux_no_minor,
"Scientific Linux.*release (\\d+)", 0);
COMPILE (re_major_minor, "(\\d+)\\.(\\d+)", 0);
- COMPILE (re_aug_seq, "/\\d+$", 0);
COMPILE (re_xdev, "^/dev/(h|s|v|xv)d([a-z]+)(\\d*)$", 0);
COMPILE (re_cciss, "^/dev/(cciss/c\\d+d\\d+)(?:p(\\d+))?$", 0);
COMPILE (re_mdN, "^(/dev/md\\d+)$", 0);
@@ -132,7 +131,6 @@ free_regexps (void)
pcre_free (re_scientific_linux);
pcre_free (re_scientific_linux_no_minor);
pcre_free (re_major_minor);
- pcre_free (re_aug_seq);
pcre_free (re_xdev);
pcre_free (re_cciss);
pcre_free (re_mdN);
@@ -725,47 +723,46 @@ check_fstab (guestfs_h *g, struct inspect_fs *fs)
Hash_table *md_map;
if (!map_md_devices (g, &md_map)) return -1;
- char **lines = guestfs_aug_ls (g, "/files/etc/fstab");
- if (lines == NULL) goto error;
+ char **entries = guestfs_aug_match (g, "/files/etc/fstab/*"
+ "[label() != '#comment']");
+ if (entries == NULL) goto error;
- if (lines[0] == NULL) {
+ if (entries[0] == NULL) {
error (g, _("could not parse /etc/fstab or empty file"));
goto error;
}
- size_t i;
char augpath[256];
- for (i = 0; lines[i] != NULL; ++i) {
- /* Ignore comments. Only care about sequence lines which
- * match m{/\d+$}.
- */
- if (match (g, lines[i], re_aug_seq)) {
- snprintf (augpath, sizeof augpath, "%s/spec", lines[i]);
- char *spec = guestfs_aug_get (g, augpath);
- if (spec == NULL) goto error;
-
- snprintf (augpath, sizeof augpath, "%s/file", lines[i]);
- char *mp = guestfs_aug_get (g, augpath);
- if (mp == NULL) {
- free (spec);
- goto error;
- }
-
- int r = add_fstab_entry (g, fs, spec, mp, md_map);
+ for (char **entry = entries; *entry != NULL; entry++) {
+ int len;
+
+ len = snprintf(augpath, sizeof(augpath), "%s/spec", *entry);
+ if (len < 0 || (size_t)len >= sizeof(augpath)) g->abort_cb();
+ char *spec = guestfs_aug_get (g, augpath);
+ if (spec == NULL) goto error;
+
+ len = snprintf(augpath, sizeof(augpath), "%s/file", *entry);
+ if (len < 0 || (size_t)len >= sizeof(augpath)) g->abort_cb();
+ char *mp = guestfs_aug_get (g, augpath);
+ if (mp == NULL) {
free (spec);
- free (mp);
-
- if (r == -1) goto error;
+ goto error;
}
+
+ int r = add_fstab_entry (g, fs, spec, mp, md_map);
+ free (spec);
+ free (mp);
+
+ if (r == -1) goto error;
}
hash_free (md_map);
- guestfs___free_string_list (lines);
+ guestfs___free_string_list (entries);
return 0;
error:
hash_free (md_map);
- if (lines) guestfs___free_string_list (lines);
+ if (entries) guestfs___free_string_list (entries);
return -1;
}
--
1.7.7.3