libmount: add debug messages and fix typos in tab_update

Signed-off-by: Karel Zak <kzak@redhat.com>

3 files changed, 32 insertions, 13 deletions

diff --git a/shlibs/mount/src/tab_parse.c b/shlibs/mount/src/tab_parse.c
index a1857a44..af500832 100644
--- a/shlibs/mount/src/tab_parse.c
+++ b/shlibs/mount/src/tab_parse.c
@@ -148,7 +148,11 @@ static int mnt_parse_mountinfo_line(mnt_fs *fs, char *s)
 		} else
 			unmangle_string(src);
 
-		unmangle_string(fs->fs_optstr);
+		if (!strcmp(fs->fs_optstr, "none")) {
+			free(fs->fs_optstr);
+			fs->fs_optstr = NULL;
+		} else
+			unmangle_string(fs->fs_optstr);
 
 		rc = __mnt_fs_set_fstype_ptr(fs, fstype);
 		if (!rc)
diff --git a/shlibs/mount/src/tab_update.c b/shlibs/mount/src/tab_update.c
index 09c9cdfa..99b2a890 100644
--- a/shlibs/mount/src/tab_update.c
+++ b/shlibs/mount/src/tab_update.c
@@ -676,18 +676,22 @@ static int update(const char *target, mnt_fs *fs, unsigned long mountflags)
 
 		if (rc && writable)
 			upd = mnt_new_update(TRUE);
-		else
-			return -EACCES;
+		else {
+			fprintf(stderr, "utab useless: %m\n");
+			return -1;
+		}
 	}
 
 	rc = mnt_update_set_fs(upd, mountflags, target, fs);
-	if (rc)
-		goto done;
 	if (rc == 1) {
-		fprintf(stderr, "update is unnecessary\n");
+		/* update is unnecessary */
 		rc = 0;
 		goto done;
 	}
+	if (rc) {
+		fprintf(stderr, "failed to set FS\n");
+		goto done;
+	}
 
 	/* [... here should be mount(2) call ...]  */
 
diff --git a/shlibs/mount/src/utils.c b/shlibs/mount/src/utils.c
index 410028fa..0f17edfe 100644
--- a/shlibs/mount/src/utils.c
+++ b/shlibs/mount/src/utils.c
@@ -448,6 +448,8 @@ int mnt_has_regular_mtab(const char **mtab, int *writable)
 	int rc;
 	const char *filename = mtab && *mtab ? *mtab : mnt_get_mtab_path();
 
+	if (writable)
+		*writable = 0;
 	if (mtab && !*mtab)
 		*mtab = filename;
 
@@ -462,17 +464,21 @@ int mnt_has_regular_mtab(const char **mtab, int *writable)
 				*writable = !try_write(filename);
 			return 1;
 		}
-		return 0;	/* it's not regular file */
+		goto done;
 	}
 
 	/* try to create the file */
 	if (writable) {
 		*writable = !try_write(filename);
-		return *writable;
+		if (*writable)
+			return 1;
 	}
 
+done:
+	DBG(UTILS, mnt_debug("%s: irregular/non-writable", filename));
 	return 0;
 }
+
 /**
  *
  * mnt_has_regular_utab:
@@ -492,6 +498,8 @@ int mnt_has_regular_utab(const char **utab, int *writable)
 	int rc;
 	const char *filename = utab && *utab ? *utab : mnt_get_utab_path();
 
+	if (writable)
+		*writable = 0;
 	if (utab && !*utab)
 		*utab = filename;
 
@@ -503,28 +511,31 @@ int mnt_has_regular_utab(const char **utab, int *writable)
 		/* file exist */
 		if (S_ISREG(st.st_mode)) {
 			if (writable)
-				*writable = try_write(filename);
+				*writable = !try_write(filename);
 			return 1;
 		}
-		return 0;	/* it's not regular file */
+		goto done;	/* it's not regular file */
 	}
 
 	if (writable) {
 		char *dirname = strdup(filename);
 
 		if (!dirname)
-			return 0;
+			goto done;
 
 		stripoff_last_component(dirname);	/* remove filename */
 
 		rc = mkdir(dirname, 755);
 		free(dirname);
 		if (rc && errno != EEXIST)
-			return 0;			/* probably EACCES */
+			goto done;			/* probably EACCES */
 
 		*writable = !try_write(filename);
-		return *writable;
+		if (*writable)
+			return 1;
 	}
+done:
+	DBG(UTILS, mnt_debug("%s: irregular/non-writable file", filename));
 	return 0;
 }