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Diffstat (limited to 'fs_mgr/fs_mgr.c')
-rw-r--r--fs_mgr/fs_mgr.c117
1 files changed, 32 insertions, 85 deletions
diff --git a/fs_mgr/fs_mgr.c b/fs_mgr/fs_mgr.c
index f432f6a..24ce806 100644
--- a/fs_mgr/fs_mgr.c
+++ b/fs_mgr/fs_mgr.c
@@ -28,11 +28,6 @@
#include <libgen.h>
#include <time.h>
#include <sys/swap.h>
-/* XXX These need to be obtained from kernel headers. See b/9336527 */
-#define SWAP_FLAG_PREFER 0x8000
-#define SWAP_FLAG_PRIO_MASK 0x7fff
-#define SWAP_FLAG_PRIO_SHIFT 0
-#define SWAP_FLAG_DISCARD 0x10000
#include <linux/loop.h>
#include <private/android_filesystem_config.h>
@@ -238,74 +233,16 @@ out:
return f;
}
-/* Read a line of text till the next newline character.
- * If no newline is found before the buffer is full, continue reading till a new line is seen,
- * then return an empty buffer. This effectively ignores lines that are too long.
- * On EOF, return null.
- */
-static char *fs_getline(char *buf, int size, FILE *file)
-{
- int cnt = 0;
- int eof = 0;
- int eol = 0;
- int c;
-
- if (size < 1) {
- return NULL;
- }
-
- while (cnt < (size - 1)) {
- c = getc(file);
- if (c == EOF) {
- eof = 1;
- break;
- }
-
- *(buf + cnt) = c;
- cnt++;
-
- if (c == '\n') {
- eol = 1;
- break;
- }
- }
-
- /* Null terminate what we've read */
- *(buf + cnt) = '\0';
-
- if (eof) {
- if (cnt) {
- return buf;
- } else {
- return NULL;
- }
- } else if (eol) {
- return buf;
- } else {
- /* The line is too long. Read till a newline or EOF.
- * If EOF, return null, if newline, return an empty buffer.
- */
- while(1) {
- c = getc(file);
- if (c == EOF) {
- return NULL;
- } else if (c == '\n') {
- *buf = '\0';
- return buf;
- }
- }
- }
-}
-
struct fstab *fs_mgr_read_fstab(const char *fstab_path)
{
FILE *fstab_file;
int cnt, entries;
- int len;
- char line[256];
+ ssize_t len;
+ size_t alloc_len = 0;
+ char *line = NULL;
const char *delim = " \t";
char *save_ptr, *p;
- struct fstab *fstab;
+ struct fstab *fstab = NULL;
struct fstab_rec *recs;
struct fs_mgr_flag_values flag_vals;
#define FS_OPTIONS_LEN 1024
@@ -318,9 +255,8 @@ struct fstab *fs_mgr_read_fstab(const char *fstab_path)
}
entries = 0;
- while (fs_getline(line, sizeof(line), fstab_file)) {
+ while ((len = getline(&line, &alloc_len, fstab_file)) != -1) {
/* if the last character is a newline, shorten the string by 1 byte */
- len = strlen(line);
if (line[len - 1] == '\n') {
line[len - 1] = '\0';
}
@@ -337,7 +273,7 @@ struct fstab *fs_mgr_read_fstab(const char *fstab_path)
if (!entries) {
ERROR("No entries found in fstab\n");
- return 0;
+ goto err;
}
/* Allocate and init the fstab structure */
@@ -349,9 +285,8 @@ struct fstab *fs_mgr_read_fstab(const char *fstab_path)
fseek(fstab_file, 0, SEEK_SET);
cnt = 0;
- while (fs_getline(line, sizeof(line), fstab_file)) {
+ while ((len = getline(&line, &alloc_len, fstab_file)) != -1) {
/* if the last character is a newline, shorten the string by 1 byte */
- len = strlen(line);
if (line[len - 1] == '\n') {
line[len - 1] = '\0';
}
@@ -376,25 +311,25 @@ struct fstab *fs_mgr_read_fstab(const char *fstab_path)
if (!(p = strtok_r(line, delim, &save_ptr))) {
ERROR("Error parsing mount source\n");
- return 0;
+ goto err;
}
fstab->recs[cnt].blk_device = strdup(p);
if (!(p = strtok_r(NULL, delim, &save_ptr))) {
ERROR("Error parsing mount_point\n");
- return 0;
+ goto err;
}
fstab->recs[cnt].mount_point = strdup(p);
if (!(p = strtok_r(NULL, delim, &save_ptr))) {
ERROR("Error parsing fs_type\n");
- return 0;
+ goto err;
}
fstab->recs[cnt].fs_type = strdup(p);
if (!(p = strtok_r(NULL, delim, &save_ptr))) {
ERROR("Error parsing mount_flags\n");
- return 0;
+ goto err;
}
tmp_fs_options[0] = '\0';
fstab->recs[cnt].flags = parse_flags(p, mount_flags, NULL,
@@ -409,7 +344,7 @@ struct fstab *fs_mgr_read_fstab(const char *fstab_path)
if (!(p = strtok_r(NULL, delim, &save_ptr))) {
ERROR("Error parsing fs_mgr_options\n");
- return 0;
+ goto err;
}
fstab->recs[cnt].fs_mgr_flags = parse_flags(p, fs_mgr_flags,
&flag_vals, NULL, 0);
@@ -422,8 +357,15 @@ struct fstab *fs_mgr_read_fstab(const char *fstab_path)
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)
@@ -442,7 +384,6 @@ void fs_mgr_free_fstab(struct fstab *fstab)
free(fstab->recs[i].fs_options);
free(fstab->recs[i].key_loc);
free(fstab->recs[i].label);
- i++;
}
/* Free the fstab_recs array created by calloc(3) */
@@ -576,6 +517,7 @@ int fs_mgr_mount_all(struct fstab *fstab)
int encrypted = 0;
int ret = -1;
int mret;
+ int mount_errno;
if (!fstab) {
return ret;
@@ -619,6 +561,9 @@ int fs_mgr_mount_all(struct fstab *fstab)
continue;
}
+ /* back up errno as partition_wipe clobbers the value */
+ mount_errno = errno;
+
/* mount(2) returned an error, check if it's encrypted and deal with it */
if ((fstab->recs[i].fs_mgr_flags & MF_CRYPT) &&
!partition_wiped(fstab->recs[i].blk_device)) {
@@ -627,14 +572,16 @@ int fs_mgr_mount_all(struct fstab *fstab)
*/
if (mount("tmpfs", fstab->recs[i].mount_point, "tmpfs",
MS_NOATIME | MS_NOSUID | MS_NODEV, CRYPTO_TMPFS_OPTIONS) < 0) {
- ERROR("Cannot mount tmpfs filesystem for encrypted fs at %s\n",
- fstab->recs[i].mount_point);
+ ERROR("Cannot mount tmpfs filesystem for encrypted fs at %s error: %s\n",
+ fstab->recs[i].mount_point, strerror(errno));
goto out;
}
encrypted = 1;
} else {
- ERROR("Cannot mount filesystem on %s at %s\n",
- fstab->recs[i].blk_device, fstab->recs[i].mount_point);
+ ERROR("Failed to mount an un-encryptable or wiped partition on"
+ "%s at %s options: %s error: %s\n",
+ fstab->recs[i].blk_device, fstab->recs[i].mount_point,
+ fstab->recs[i].fs_options, strerror(mount_errno));
goto out;
}
}
@@ -703,8 +650,8 @@ int fs_mgr_do_mount(struct fstab *fstab, char *n_name, char *n_blk_device,
}
if (__mount(n_blk_device, m, fstab->recs[i].fs_type,
fstab->recs[i].flags, fstab->recs[i].fs_options)) {
- ERROR("Cannot mount filesystem on %s at %s\n",
- n_blk_device, m);
+ ERROR("Cannot mount filesystem on %s at %s options: %s error: %s\n",
+ n_blk_device, m, fstab->recs[i].fs_options, strerror(errno));
goto out;
} else {
ret = 0;
generated by cgit v1.1 at 2025-08-16 08:14:23 +0000