fs_mgr: split fstab parsing into separate file
Move fstab parsing into fs_mgr_fstab.c so that it compiles into a
separate compilation unit. uncrypt links against it but doesn't
need to pull in the rest of the dependencies on fs_mgr.c.
Change-Id: I6bffe1cd42720151533e958028259d1931aaa4bf
diff --git a/fs_mgr/Android.mk b/fs_mgr/Android.mk
index 790598a..165ebd4 100644
--- a/fs_mgr/Android.mk
+++ b/fs_mgr/Android.mk
@@ -3,7 +3,7 @@
LOCAL_PATH:= $(call my-dir)
include $(CLEAR_VARS)
-LOCAL_SRC_FILES:= fs_mgr.c fs_mgr_verity.c
+LOCAL_SRC_FILES:= fs_mgr.c fs_mgr_verity.c fs_mgr_fstab.c
LOCAL_C_INCLUDES := $(LOCAL_PATH)/include
diff --git a/fs_mgr/fs_mgr.c b/fs_mgr/fs_mgr.c
index 24ce806..4c2f247 100644
--- a/fs_mgr/fs_mgr.c
+++ b/fs_mgr/fs_mgr.c
@@ -54,55 +54,6 @@
#define ARRAY_SIZE(a) (sizeof(a) / sizeof(*(a)))
-struct flag_list {
- const char *name;
- unsigned flag;
-};
-
-static struct flag_list mount_flags[] = {
- { "noatime", MS_NOATIME },
- { "noexec", MS_NOEXEC },
- { "nosuid", MS_NOSUID },
- { "nodev", MS_NODEV },
- { "nodiratime", MS_NODIRATIME },
- { "ro", MS_RDONLY },
- { "rw", 0 },
- { "remount", MS_REMOUNT },
- { "bind", MS_BIND },
- { "rec", MS_REC },
- { "unbindable", MS_UNBINDABLE },
- { "private", MS_PRIVATE },
- { "slave", MS_SLAVE },
- { "shared", MS_SHARED },
- { "defaults", 0 },
- { 0, 0 },
-};
-
-static struct flag_list fs_mgr_flags[] = {
- { "wait", MF_WAIT },
- { "check", MF_CHECK },
- { "encryptable=",MF_CRYPT },
- { "nonremovable",MF_NONREMOVABLE },
- { "voldmanaged=",MF_VOLDMANAGED},
- { "length=", MF_LENGTH },
- { "recoveryonly",MF_RECOVERYONLY },
- { "swapprio=", MF_SWAPPRIO },
- { "zramsize=", MF_ZRAMSIZE },
- { "verify", MF_VERIFY },
- { "noemulatedsd", MF_NOEMULATEDSD },
- { "defaults", 0 },
- { 0, 0 },
-};
-
-struct fs_mgr_flag_values {
- char *key_loc;
- long long part_length;
- char *label;
- int partnum;
- int swap_prio;
- unsigned int zram_size;
-};
-
/*
* gettime() - returns the time in seconds of the system's monotonic clock or
* zero on error.
@@ -133,269 +84,6 @@
return ret;
}
-static int parse_flags(char *flags, struct flag_list *fl,
- struct fs_mgr_flag_values *flag_vals,
- char *fs_options, int fs_options_len)
-{
- int f = 0;
- int i;
- char *p;
- char *savep;
-
- /* initialize flag values. If we find a relevant flag, we'll
- * update the value */
- if (flag_vals) {
- memset(flag_vals, 0, sizeof(*flag_vals));
- flag_vals->partnum = -1;
- flag_vals->swap_prio = -1; /* negative means it wasn't specified. */
- }
-
- /* initialize fs_options to the null string */
- if (fs_options && (fs_options_len > 0)) {
- fs_options[0] = '\0';
- }
-
- p = strtok_r(flags, ",", &savep);
- while (p) {
- /* Look for the flag "p" in the flag list "fl"
- * If not found, the loop exits with fl[i].name being null.
- */
- for (i = 0; fl[i].name; i++) {
- if (!strncmp(p, fl[i].name, strlen(fl[i].name))) {
- f |= fl[i].flag;
- if ((fl[i].flag == MF_CRYPT) && flag_vals) {
- /* The encryptable flag is followed by an = and the
- * location of the keys. Get it and return it.
- */
- flag_vals->key_loc = strdup(strchr(p, '=') + 1);
- } else if ((fl[i].flag == MF_LENGTH) && flag_vals) {
- /* The length flag is followed by an = and the
- * size of the partition. Get it and return it.
- */
- flag_vals->part_length = strtoll(strchr(p, '=') + 1, NULL, 0);
- } else if ((fl[i].flag == MF_VOLDMANAGED) && flag_vals) {
- /* The voldmanaged flag is followed by an = and the
- * label, a colon and the partition number or the
- * word "auto", e.g.
- * voldmanaged=sdcard:3
- * Get and return them.
- */
- char *label_start;
- char *label_end;
- char *part_start;
-
- label_start = strchr(p, '=') + 1;
- label_end = strchr(p, ':');
- if (label_end) {
- flag_vals->label = strndup(label_start,
- (int) (label_end - label_start));
- part_start = strchr(p, ':') + 1;
- if (!strcmp(part_start, "auto")) {
- flag_vals->partnum = -1;
- } else {
- flag_vals->partnum = strtol(part_start, NULL, 0);
- }
- } else {
- ERROR("Warning: voldmanaged= flag malformed\n");
- }
- } else if ((fl[i].flag == MF_SWAPPRIO) && flag_vals) {
- flag_vals->swap_prio = strtoll(strchr(p, '=') + 1, NULL, 0);
- } else if ((fl[i].flag == MF_ZRAMSIZE) && flag_vals) {
- flag_vals->zram_size = strtoll(strchr(p, '=') + 1, NULL, 0);
- }
- break;
- }
- }
-
- if (!fl[i].name) {
- if (fs_options) {
- /* It's not a known flag, so it must be a filesystem specific
- * option. Add it to fs_options if it was passed in.
- */
- strlcat(fs_options, p, fs_options_len);
- strlcat(fs_options, ",", fs_options_len);
- } else {
- /* fs_options was not passed in, so if the flag is unknown
- * it's an error.
- */
- ERROR("Warning: unknown flag %s\n", p);
- }
- }
- p = strtok_r(NULL, ",", &savep);
- }
-
-out:
- if (fs_options && fs_options[0]) {
- /* remove the last trailing comma from the list of options */
- fs_options[strlen(fs_options) - 1] = '\0';
- }
-
- return f;
-}
-
-struct fstab *fs_mgr_read_fstab(const char *fstab_path)
-{
- FILE *fstab_file;
- int cnt, entries;
- ssize_t len;
- size_t alloc_len = 0;
- char *line = NULL;
- const char *delim = " \t";
- char *save_ptr, *p;
- struct fstab *fstab = NULL;
- struct fstab_rec *recs;
- struct fs_mgr_flag_values flag_vals;
-#define FS_OPTIONS_LEN 1024
- char tmp_fs_options[FS_OPTIONS_LEN];
-
- fstab_file = fopen(fstab_path, "r");
- if (!fstab_file) {
- ERROR("Cannot open file %s\n", fstab_path);
- return 0;
- }
-
- entries = 0;
- while ((len = getline(&line, &alloc_len, fstab_file)) != -1) {
- /* if the last character is a newline, shorten the string by 1 byte */
- if (line[len - 1] == '\n') {
- line[len - 1] = '\0';
- }
- /* Skip any leading whitespace */
- p = line;
- while (isspace(*p)) {
- p++;
- }
- /* ignore comments or empty lines */
- if (*p == '#' || *p == '\0')
- continue;
- entries++;
- }
-
- if (!entries) {
- ERROR("No entries found in fstab\n");
- goto err;
- }
-
- /* Allocate and init the fstab structure */
- fstab = calloc(1, sizeof(struct fstab));
- fstab->num_entries = entries;
- fstab->fstab_filename = strdup(fstab_path);
- fstab->recs = calloc(fstab->num_entries, sizeof(struct fstab_rec));
-
- fseek(fstab_file, 0, SEEK_SET);
-
- cnt = 0;
- while ((len = getline(&line, &alloc_len, fstab_file)) != -1) {
- /* if the last character is a newline, shorten the string by 1 byte */
- if (line[len - 1] == '\n') {
- line[len - 1] = '\0';
- }
-
- /* Skip any leading whitespace */
- p = line;
- while (isspace(*p)) {
- p++;
- }
- /* ignore comments or empty lines */
- if (*p == '#' || *p == '\0')
- continue;
-
- /* If a non-comment entry is greater than the size we allocated, give an
- * error and quit. This can happen in the unlikely case the file changes
- * between the two reads.
- */
- if (cnt >= entries) {
- ERROR("Tried to process more entries than counted\n");
- break;
- }
-
- if (!(p = strtok_r(line, delim, &save_ptr))) {
- ERROR("Error parsing mount source\n");
- goto err;
- }
- fstab->recs[cnt].blk_device = strdup(p);
-
- if (!(p = strtok_r(NULL, delim, &save_ptr))) {
- ERROR("Error parsing mount_point\n");
- goto err;
- }
- fstab->recs[cnt].mount_point = strdup(p);
-
- if (!(p = strtok_r(NULL, delim, &save_ptr))) {
- ERROR("Error parsing fs_type\n");
- goto err;
- }
- fstab->recs[cnt].fs_type = strdup(p);
-
- if (!(p = strtok_r(NULL, delim, &save_ptr))) {
- ERROR("Error parsing mount_flags\n");
- goto err;
- }
- tmp_fs_options[0] = '\0';
- fstab->recs[cnt].flags = parse_flags(p, mount_flags, NULL,
- tmp_fs_options, FS_OPTIONS_LEN);
-
- /* fs_options are optional */
- if (tmp_fs_options[0]) {
- fstab->recs[cnt].fs_options = strdup(tmp_fs_options);
- } else {
- fstab->recs[cnt].fs_options = NULL;
- }
-
- if (!(p = strtok_r(NULL, delim, &save_ptr))) {
- ERROR("Error parsing fs_mgr_options\n");
- goto err;
- }
- fstab->recs[cnt].fs_mgr_flags = parse_flags(p, fs_mgr_flags,
- &flag_vals, NULL, 0);
- fstab->recs[cnt].key_loc = flag_vals.key_loc;
- fstab->recs[cnt].length = flag_vals.part_length;
- fstab->recs[cnt].label = flag_vals.label;
- fstab->recs[cnt].partnum = flag_vals.partnum;
- fstab->recs[cnt].swap_prio = flag_vals.swap_prio;
- fstab->recs[cnt].zram_size = flag_vals.zram_size;
- cnt++;
- }
- fclose(fstab_file);
- free(line);
- return fstab;
-
-err:
- fclose(fstab_file);
- free(line);
- if (fstab)
- fs_mgr_free_fstab(fstab);
- return NULL;
-}
-
-void fs_mgr_free_fstab(struct fstab *fstab)
-{
- int i;
-
- if (!fstab) {
- return;
- }
-
- for (i = 0; i < fstab->num_entries; i++) {
- /* Free the pointers return by strdup(3) */
- free(fstab->recs[i].blk_device);
- free(fstab->recs[i].mount_point);
- free(fstab->recs[i].fs_type);
- free(fstab->recs[i].fs_options);
- free(fstab->recs[i].key_loc);
- free(fstab->recs[i].label);
- }
-
- /* Free the fstab_recs array created by calloc(3) */
- free(fstab->recs);
-
- /* Free the fstab filename */
- free(fstab->fstab_filename);
-
- /* Free fstab */
- free(fstab);
-}
-
static void check_fs(char *blk_device, char *fs_type, char *target)
{
int status;
@@ -823,71 +511,3 @@
return 0;
}
-
-/* Add an entry to the fstab, and return 0 on success or -1 on error */
-int fs_mgr_add_entry(struct fstab *fstab,
- const char *mount_point, const char *fs_type,
- const char *blk_device, long long length)
-{
- struct fstab_rec *new_fstab_recs;
- int n = fstab->num_entries;
-
- new_fstab_recs = (struct fstab_rec *)
- realloc(fstab->recs, sizeof(struct fstab_rec) * (n + 1));
-
- if (!new_fstab_recs) {
- return -1;
- }
-
- /* A new entry was added, so initialize it */
- memset(&new_fstab_recs[n], 0, sizeof(struct fstab_rec));
- new_fstab_recs[n].mount_point = strdup(mount_point);
- new_fstab_recs[n].fs_type = strdup(fs_type);
- new_fstab_recs[n].blk_device = strdup(blk_device);
- new_fstab_recs[n].length = 0;
-
- /* Update the fstab struct */
- fstab->recs = new_fstab_recs;
- fstab->num_entries++;
-
- return 0;
-}
-
-struct fstab_rec *fs_mgr_get_entry_for_mount_point(struct fstab *fstab, const char *path)
-{
- int i;
-
- if (!fstab) {
- return NULL;
- }
-
- for (i = 0; i < fstab->num_entries; i++) {
- int len = strlen(fstab->recs[i].mount_point);
- if (strncmp(path, fstab->recs[i].mount_point, len) == 0 &&
- (path[len] == '\0' || path[len] == '/')) {
- return &fstab->recs[i];
- }
- }
-
- return NULL;
-}
-
-int fs_mgr_is_voldmanaged(struct fstab_rec *fstab)
-{
- return fstab->fs_mgr_flags & MF_VOLDMANAGED;
-}
-
-int fs_mgr_is_nonremovable(struct fstab_rec *fstab)
-{
- return fstab->fs_mgr_flags & MF_NONREMOVABLE;
-}
-
-int fs_mgr_is_encryptable(struct fstab_rec *fstab)
-{
- return fstab->fs_mgr_flags & MF_CRYPT;
-}
-
-int fs_mgr_is_noemulatedsd(struct fstab_rec *fstab)
-{
- return fstab->fs_mgr_flags & MF_NOEMULATEDSD;
-}
diff --git a/fs_mgr/fs_mgr_fstab.c b/fs_mgr/fs_mgr_fstab.c
new file mode 100644
index 0000000..6145771
--- /dev/null
+++ b/fs_mgr/fs_mgr_fstab.c
@@ -0,0 +1,403 @@
+/*
+ * Copyright (C) 2014 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <ctype.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/mount.h>
+
+#include "fs_mgr_priv.h"
+
+struct fs_mgr_flag_values {
+ char *key_loc;
+ long long part_length;
+ char *label;
+ int partnum;
+ int swap_prio;
+ unsigned int zram_size;
+};
+
+struct flag_list {
+ const char *name;
+ unsigned flag;
+};
+
+static struct flag_list mount_flags[] = {
+ { "noatime", MS_NOATIME },
+ { "noexec", MS_NOEXEC },
+ { "nosuid", MS_NOSUID },
+ { "nodev", MS_NODEV },
+ { "nodiratime", MS_NODIRATIME },
+ { "ro", MS_RDONLY },
+ { "rw", 0 },
+ { "remount", MS_REMOUNT },
+ { "bind", MS_BIND },
+ { "rec", MS_REC },
+ { "unbindable", MS_UNBINDABLE },
+ { "private", MS_PRIVATE },
+ { "slave", MS_SLAVE },
+ { "shared", MS_SHARED },
+ { "defaults", 0 },
+ { 0, 0 },
+};
+
+static struct flag_list fs_mgr_flags[] = {
+ { "wait", MF_WAIT },
+ { "check", MF_CHECK },
+ { "encryptable=",MF_CRYPT },
+ { "nonremovable",MF_NONREMOVABLE },
+ { "voldmanaged=",MF_VOLDMANAGED},
+ { "length=", MF_LENGTH },
+ { "recoveryonly",MF_RECOVERYONLY },
+ { "swapprio=", MF_SWAPPRIO },
+ { "zramsize=", MF_ZRAMSIZE },
+ { "verify", MF_VERIFY },
+ { "noemulatedsd", MF_NOEMULATEDSD },
+ { "defaults", 0 },
+ { 0, 0 },
+};
+
+static int parse_flags(char *flags, struct flag_list *fl,
+ struct fs_mgr_flag_values *flag_vals,
+ char *fs_options, int fs_options_len)
+{
+ int f = 0;
+ int i;
+ char *p;
+ char *savep;
+
+ /* initialize flag values. If we find a relevant flag, we'll
+ * update the value */
+ if (flag_vals) {
+ memset(flag_vals, 0, sizeof(*flag_vals));
+ flag_vals->partnum = -1;
+ flag_vals->swap_prio = -1; /* negative means it wasn't specified. */
+ }
+
+ /* initialize fs_options to the null string */
+ if (fs_options && (fs_options_len > 0)) {
+ fs_options[0] = '\0';
+ }
+
+ p = strtok_r(flags, ",", &savep);
+ while (p) {
+ /* Look for the flag "p" in the flag list "fl"
+ * If not found, the loop exits with fl[i].name being null.
+ */
+ for (i = 0; fl[i].name; i++) {
+ if (!strncmp(p, fl[i].name, strlen(fl[i].name))) {
+ f |= fl[i].flag;
+ if ((fl[i].flag == MF_CRYPT) && flag_vals) {
+ /* The encryptable flag is followed by an = and the
+ * location of the keys. Get it and return it.
+ */
+ flag_vals->key_loc = strdup(strchr(p, '=') + 1);
+ } else if ((fl[i].flag == MF_LENGTH) && flag_vals) {
+ /* The length flag is followed by an = and the
+ * size of the partition. Get it and return it.
+ */
+ flag_vals->part_length = strtoll(strchr(p, '=') + 1, NULL, 0);
+ } else if ((fl[i].flag == MF_VOLDMANAGED) && flag_vals) {
+ /* The voldmanaged flag is followed by an = and the
+ * label, a colon and the partition number or the
+ * word "auto", e.g.
+ * voldmanaged=sdcard:3
+ * Get and return them.
+ */
+ char *label_start;
+ char *label_end;
+ char *part_start;
+
+ label_start = strchr(p, '=') + 1;
+ label_end = strchr(p, ':');
+ if (label_end) {
+ flag_vals->label = strndup(label_start,
+ (int) (label_end - label_start));
+ part_start = strchr(p, ':') + 1;
+ if (!strcmp(part_start, "auto")) {
+ flag_vals->partnum = -1;
+ } else {
+ flag_vals->partnum = strtol(part_start, NULL, 0);
+ }
+ } else {
+ ERROR("Warning: voldmanaged= flag malformed\n");
+ }
+ } else if ((fl[i].flag == MF_SWAPPRIO) && flag_vals) {
+ flag_vals->swap_prio = strtoll(strchr(p, '=') + 1, NULL, 0);
+ } else if ((fl[i].flag == MF_ZRAMSIZE) && flag_vals) {
+ flag_vals->zram_size = strtoll(strchr(p, '=') + 1, NULL, 0);
+ }
+ break;
+ }
+ }
+
+ if (!fl[i].name) {
+ if (fs_options) {
+ /* It's not a known flag, so it must be a filesystem specific
+ * option. Add it to fs_options if it was passed in.
+ */
+ strlcat(fs_options, p, fs_options_len);
+ strlcat(fs_options, ",", fs_options_len);
+ } else {
+ /* fs_options was not passed in, so if the flag is unknown
+ * it's an error.
+ */
+ ERROR("Warning: unknown flag %s\n", p);
+ }
+ }
+ p = strtok_r(NULL, ",", &savep);
+ }
+
+out:
+ if (fs_options && fs_options[0]) {
+ /* remove the last trailing comma from the list of options */
+ fs_options[strlen(fs_options) - 1] = '\0';
+ }
+
+ return f;
+}
+
+struct fstab *fs_mgr_read_fstab(const char *fstab_path)
+{
+ FILE *fstab_file;
+ int cnt, entries;
+ ssize_t len;
+ size_t alloc_len = 0;
+ char *line = NULL;
+ const char *delim = " \t";
+ char *save_ptr, *p;
+ struct fstab *fstab = NULL;
+ struct fstab_rec *recs;
+ struct fs_mgr_flag_values flag_vals;
+#define FS_OPTIONS_LEN 1024
+ char tmp_fs_options[FS_OPTIONS_LEN];
+
+ fstab_file = fopen(fstab_path, "r");
+ if (!fstab_file) {
+ ERROR("Cannot open file %s\n", fstab_path);
+ return 0;
+ }
+
+ entries = 0;
+ while ((len = getline(&line, &alloc_len, fstab_file)) != -1) {
+ /* if the last character is a newline, shorten the string by 1 byte */
+ if (line[len - 1] == '\n') {
+ line[len - 1] = '\0';
+ }
+ /* Skip any leading whitespace */
+ p = line;
+ while (isspace(*p)) {
+ p++;
+ }
+ /* ignore comments or empty lines */
+ if (*p == '#' || *p == '\0')
+ continue;
+ entries++;
+ }
+
+ if (!entries) {
+ ERROR("No entries found in fstab\n");
+ goto err;
+ }
+
+ /* Allocate and init the fstab structure */
+ fstab = calloc(1, sizeof(struct fstab));
+ fstab->num_entries = entries;
+ fstab->fstab_filename = strdup(fstab_path);
+ fstab->recs = calloc(fstab->num_entries, sizeof(struct fstab_rec));
+
+ fseek(fstab_file, 0, SEEK_SET);
+
+ cnt = 0;
+ while ((len = getline(&line, &alloc_len, fstab_file)) != -1) {
+ /* if the last character is a newline, shorten the string by 1 byte */
+ if (line[len - 1] == '\n') {
+ line[len - 1] = '\0';
+ }
+
+ /* Skip any leading whitespace */
+ p = line;
+ while (isspace(*p)) {
+ p++;
+ }
+ /* ignore comments or empty lines */
+ if (*p == '#' || *p == '\0')
+ continue;
+
+ /* If a non-comment entry is greater than the size we allocated, give an
+ * error and quit. This can happen in the unlikely case the file changes
+ * between the two reads.
+ */
+ if (cnt >= entries) {
+ ERROR("Tried to process more entries than counted\n");
+ break;
+ }
+
+ if (!(p = strtok_r(line, delim, &save_ptr))) {
+ ERROR("Error parsing mount source\n");
+ goto err;
+ }
+ fstab->recs[cnt].blk_device = strdup(p);
+
+ if (!(p = strtok_r(NULL, delim, &save_ptr))) {
+ ERROR("Error parsing mount_point\n");
+ goto err;
+ }
+ fstab->recs[cnt].mount_point = strdup(p);
+
+ if (!(p = strtok_r(NULL, delim, &save_ptr))) {
+ ERROR("Error parsing fs_type\n");
+ goto err;
+ }
+ fstab->recs[cnt].fs_type = strdup(p);
+
+ if (!(p = strtok_r(NULL, delim, &save_ptr))) {
+ ERROR("Error parsing mount_flags\n");
+ goto err;
+ }
+ tmp_fs_options[0] = '\0';
+ fstab->recs[cnt].flags = parse_flags(p, mount_flags, NULL,
+ tmp_fs_options, FS_OPTIONS_LEN);
+
+ /* fs_options are optional */
+ if (tmp_fs_options[0]) {
+ fstab->recs[cnt].fs_options = strdup(tmp_fs_options);
+ } else {
+ fstab->recs[cnt].fs_options = NULL;
+ }
+
+ if (!(p = strtok_r(NULL, delim, &save_ptr))) {
+ ERROR("Error parsing fs_mgr_options\n");
+ goto err;
+ }
+ fstab->recs[cnt].fs_mgr_flags = parse_flags(p, fs_mgr_flags,
+ &flag_vals, NULL, 0);
+ fstab->recs[cnt].key_loc = flag_vals.key_loc;
+ fstab->recs[cnt].length = flag_vals.part_length;
+ fstab->recs[cnt].label = flag_vals.label;
+ fstab->recs[cnt].partnum = flag_vals.partnum;
+ fstab->recs[cnt].swap_prio = flag_vals.swap_prio;
+ fstab->recs[cnt].zram_size = flag_vals.zram_size;
+ cnt++;
+ }
+ fclose(fstab_file);
+ free(line);
+ return fstab;
+
+err:
+ fclose(fstab_file);
+ free(line);
+ if (fstab)
+ fs_mgr_free_fstab(fstab);
+ return NULL;
+}
+
+void fs_mgr_free_fstab(struct fstab *fstab)
+{
+ int i;
+
+ if (!fstab) {
+ return;
+ }
+
+ for (i = 0; i < fstab->num_entries; i++) {
+ /* Free the pointers return by strdup(3) */
+ free(fstab->recs[i].blk_device);
+ free(fstab->recs[i].mount_point);
+ free(fstab->recs[i].fs_type);
+ free(fstab->recs[i].fs_options);
+ free(fstab->recs[i].key_loc);
+ free(fstab->recs[i].label);
+ }
+
+ /* Free the fstab_recs array created by calloc(3) */
+ free(fstab->recs);
+
+ /* Free the fstab filename */
+ free(fstab->fstab_filename);
+
+ /* Free fstab */
+ free(fstab);
+}
+
+/* Add an entry to the fstab, and return 0 on success or -1 on error */
+int fs_mgr_add_entry(struct fstab *fstab,
+ const char *mount_point, const char *fs_type,
+ const char *blk_device, long long length)
+{
+ struct fstab_rec *new_fstab_recs;
+ int n = fstab->num_entries;
+
+ new_fstab_recs = (struct fstab_rec *)
+ realloc(fstab->recs, sizeof(struct fstab_rec) * (n + 1));
+
+ if (!new_fstab_recs) {
+ return -1;
+ }
+
+ /* A new entry was added, so initialize it */
+ memset(&new_fstab_recs[n], 0, sizeof(struct fstab_rec));
+ new_fstab_recs[n].mount_point = strdup(mount_point);
+ new_fstab_recs[n].fs_type = strdup(fs_type);
+ new_fstab_recs[n].blk_device = strdup(blk_device);
+ new_fstab_recs[n].length = 0;
+
+ /* Update the fstab struct */
+ fstab->recs = new_fstab_recs;
+ fstab->num_entries++;
+
+ return 0;
+}
+
+struct fstab_rec *fs_mgr_get_entry_for_mount_point(struct fstab *fstab, const char *path)
+{
+ int i;
+
+ if (!fstab) {
+ return NULL;
+ }
+
+ for (i = 0; i < fstab->num_entries; i++) {
+ int len = strlen(fstab->recs[i].mount_point);
+ if (strncmp(path, fstab->recs[i].mount_point, len) == 0 &&
+ (path[len] == '\0' || path[len] == '/')) {
+ return &fstab->recs[i];
+ }
+ }
+
+ return NULL;
+}
+
+int fs_mgr_is_voldmanaged(struct fstab_rec *fstab)
+{
+ return fstab->fs_mgr_flags & MF_VOLDMANAGED;
+}
+
+int fs_mgr_is_nonremovable(struct fstab_rec *fstab)
+{
+ return fstab->fs_mgr_flags & MF_NONREMOVABLE;
+}
+
+int fs_mgr_is_encryptable(struct fstab_rec *fstab)
+{
+ return fstab->fs_mgr_flags & MF_CRYPT;
+}
+
+int fs_mgr_is_noemulatedsd(struct fstab_rec *fstab)
+{
+ return fstab->fs_mgr_flags & MF_NOEMULATEDSD;
+}