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-rw-r--r--mtdutils/flash_image.c8
-rw-r--r--mtdutils/mounts.c89
-rw-r--r--mtdutils/mtdutils.c47
-rw-r--r--mtdutils/mtdutils.h2
4 files changed, 44 insertions, 102 deletions
diff --git a/mtdutils/flash_image.c b/mtdutils/flash_image.c
index 5657dfc82..36ffa1314 100644
--- a/mtdutils/flash_image.c
+++ b/mtdutils/flash_image.c
@@ -72,7 +72,7 @@ int main(int argc, char **argv) {
if (fd < 0) die("error opening %s", argv[2]);
char header[HEADER_SIZE];
- int headerlen = read(fd, header, sizeof(header));
+ int headerlen = TEMP_FAILURE_RETRY(read(fd, header, sizeof(header)));
if (headerlen <= 0) die("error reading %s header", argv[2]);
MtdReadContext *in = mtd_read_partition(partition);
@@ -104,7 +104,7 @@ int main(int argc, char **argv) {
if (wrote != headerlen) die("error writing %s", argv[1]);
int len;
- while ((len = read(fd, buf, sizeof(buf))) > 0) {
+ while ((len = TEMP_FAILURE_RETRY(read(fd, buf, sizeof(buf)))) > 0) {
wrote = mtd_write_data(out, buf, len);
if (wrote != len) die("error writing %s", argv[1]);
}
@@ -125,13 +125,13 @@ int main(int argc, char **argv) {
if (mtd_partition_info(partition, NULL, &block_size, NULL))
die("error getting %s block size", argv[1]);
- if (lseek(fd, headerlen, SEEK_SET) != headerlen)
+ if (TEMP_FAILURE_RETRY(lseek(fd, headerlen, SEEK_SET)) != headerlen)
die("error rewinding %s", argv[2]);
int left = block_size - headerlen;
while (left < 0) left += block_size;
while (left > 0) {
- len = read(fd, buf, left > (int)sizeof(buf) ? (int)sizeof(buf) : left);
+ len = TEMP_FAILURE_RETRY(read(fd, buf, left > (int)sizeof(buf) ? (int)sizeof(buf) : left));
if (len <= 0) die("error reading %s", argv[2]);
if (mtd_write_data(out, buf, len) != len)
die("error writing %s", argv[1]);
diff --git a/mtdutils/mounts.c b/mtdutils/mounts.c
index c90fc8acf..6a9b03d30 100644
--- a/mtdutils/mounts.c
+++ b/mtdutils/mounts.c
@@ -14,6 +14,7 @@
* limitations under the License.
*/
+#include <mntent.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
@@ -59,10 +60,8 @@ free_volume_internals(const MountedVolume *volume, int zero)
int
scan_mounted_volumes()
{
- char buf[2048];
- const char *bufp;
- int fd;
- ssize_t nbytes;
+ FILE* fp;
+ struct mntent* mentry;
if (g_mounts_state.volumes == NULL) {
const int numv = 32;
@@ -84,80 +83,20 @@ scan_mounted_volumes()
}
g_mounts_state.volume_count = 0;
- /* Open and read the file contents.
- */
- fd = open(PROC_MOUNTS_FILENAME, O_RDONLY);
- if (fd < 0) {
- goto bail;
- }
- nbytes = read(fd, buf, sizeof(buf) - 1);
- close(fd);
- if (nbytes < 0) {
- goto bail;
+ /* Open and read mount table entries. */
+ fp = setmntent(PROC_MOUNTS_FILENAME, "r");
+ if (fp == NULL) {
+ return -1;
}
- buf[nbytes] = '\0';
-
- /* Parse the contents of the file, which looks like:
- *
- * # cat /proc/mounts
- * rootfs / rootfs rw 0 0
- * /dev/pts /dev/pts devpts rw 0 0
- * /proc /proc proc rw 0 0
- * /sys /sys sysfs rw 0 0
- * /dev/block/mtdblock4 /system yaffs2 rw,nodev,noatime,nodiratime 0 0
- * /dev/block/mtdblock5 /data yaffs2 rw,nodev,noatime,nodiratime 0 0
- * /dev/block/mmcblk0p1 /sdcard vfat rw,sync,dirsync,fmask=0000,dmask=0000,codepage=cp437,iocharset=iso8859-1,utf8 0 0
- *
- * The zeroes at the end are dummy placeholder fields to make the
- * output match Linux's /etc/mtab, but don't represent anything here.
- */
- bufp = buf;
- while (nbytes > 0) {
- char device[64];
- char mount_point[64];
- char filesystem[64];
- char flags[128];
- int matches;
-
- /* %as is a gnu extension that malloc()s a string for each field.
- */
- matches = sscanf(bufp, "%63s %63s %63s %127s",
- device, mount_point, filesystem, flags);
-
- if (matches == 4) {
- device[sizeof(device)-1] = '\0';
- mount_point[sizeof(mount_point)-1] = '\0';
- filesystem[sizeof(filesystem)-1] = '\0';
- flags[sizeof(flags)-1] = '\0';
-
- MountedVolume *v =
- &g_mounts_state.volumes[g_mounts_state.volume_count++];
- v->device = strdup(device);
- v->mount_point = strdup(mount_point);
- v->filesystem = strdup(filesystem);
- v->flags = strdup(flags);
- } else {
-printf("matches was %d on <<%.40s>>\n", matches, bufp);
- }
-
- /* Eat the line.
- */
- while (nbytes > 0 && *bufp != '\n') {
- bufp++;
- nbytes--;
- }
- if (nbytes > 0) {
- bufp++;
- nbytes--;
- }
+ while ((mentry = getmntent(fp)) != NULL) {
+ MountedVolume* v = &g_mounts_state.volumes[g_mounts_state.volume_count++];
+ v->device = strdup(mentry->mnt_fsname);
+ v->mount_point = strdup(mentry->mnt_dir);
+ v->filesystem = strdup(mentry->mnt_type);
+ v->flags = strdup(mentry->mnt_opts);
}
-
+ endmntent(fp);
return 0;
-
-bail:
-//TODO: free the strings we've allocated.
- g_mounts_state.volume_count = 0;
- return -1;
}
const MountedVolume *
diff --git a/mtdutils/mtdutils.c b/mtdutils/mtdutils.c
index 158c88058..14be57f1e 100644
--- a/mtdutils/mtdutils.c
+++ b/mtdutils/mtdutils.c
@@ -105,7 +105,7 @@ mtd_scan_partitions()
if (fd < 0) {
goto bail;
}
- nbytes = read(fd, buf, sizeof(buf) - 1);
+ nbytes = TEMP_FAILURE_RETRY(read(fd, buf, sizeof(buf) - 1));
close(fd);
if (nbytes < 0) {
goto bail;
@@ -276,12 +276,6 @@ MtdReadContext *mtd_read_partition(const MtdPartition *partition)
return ctx;
}
-// Seeks to a location in the partition. Don't mix with reads of
-// anything other than whole blocks; unpredictable things will result.
-void mtd_read_skip_to(const MtdReadContext* ctx, size_t offset) {
- lseek64(ctx->fd, offset, SEEK_SET);
-}
-
static int read_block(const MtdPartition *partition, int fd, char *data)
{
struct mtd_ecc_stats before, after;
@@ -290,13 +284,18 @@ static int read_block(const MtdPartition *partition, int fd, char *data)
return -1;
}
- loff_t pos = lseek64(fd, 0, SEEK_CUR);
+ loff_t pos = TEMP_FAILURE_RETRY(lseek64(fd, 0, SEEK_CUR));
+ if (pos == -1) {
+ printf("mtd: read_block: couldn't SEEK_CUR: %s\n", strerror(errno));
+ return -1;
+ }
ssize_t size = partition->erase_size;
int mgbb;
while (pos + size <= (int) partition->size) {
- if (lseek64(fd, pos, SEEK_SET) != pos || read(fd, data, size) != size) {
+ if (TEMP_FAILURE_RETRY(lseek64(fd, pos, SEEK_SET)) != pos ||
+ TEMP_FAILURE_RETRY(read(fd, data, size)) != size) {
printf("mtd: read error at 0x%08llx (%s)\n",
pos, strerror(errno));
} else if (ioctl(fd, ECCGETSTATS, &after)) {
@@ -310,8 +309,8 @@ static int read_block(const MtdPartition *partition, int fd, char *data)
memcpy(&before, &after, sizeof(struct mtd_ecc_stats));
} else if ((mgbb = ioctl(fd, MEMGETBADBLOCK, &pos))) {
fprintf(stderr,
- "mtd: MEMGETBADBLOCK returned %d at 0x%08llx (errno=%d)\n",
- mgbb, pos, errno);
+ "mtd: MEMGETBADBLOCK returned %d at 0x%08llx: %s\n",
+ mgbb, pos, strerror(errno));
} else {
return 0; // Success!
}
@@ -406,8 +405,11 @@ static int write_block(MtdWriteContext *ctx, const char *data)
const MtdPartition *partition = ctx->partition;
int fd = ctx->fd;
- off_t pos = lseek(fd, 0, SEEK_CUR);
- if (pos == (off_t) -1) return 1;
+ off_t pos = TEMP_FAILURE_RETRY(lseek(fd, 0, SEEK_CUR));
+ if (pos == (off_t) -1) {
+ printf("mtd: write_block: couldn't SEEK_CUR: %s\n", strerror(errno));
+ return -1;
+ }
ssize_t size = partition->erase_size;
while (pos + size <= (int) partition->size) {
@@ -416,8 +418,8 @@ static int write_block(MtdWriteContext *ctx, const char *data)
if (ret != 0 && !(ret == -1 && errno == EOPNOTSUPP)) {
add_bad_block_offset(ctx, pos);
fprintf(stderr,
- "mtd: not writing bad block at 0x%08lx (ret %d errno %d)\n",
- pos, ret, errno);
+ "mtd: not writing bad block at 0x%08lx (ret %d): %s\n",
+ pos, ret, strerror(errno));
pos += partition->erase_size;
continue; // Don't try to erase known factory-bad blocks.
}
@@ -440,15 +442,15 @@ static int write_block(MtdWriteContext *ctx, const char *data)
continue;
}
#endif
- if (lseek(fd, pos, SEEK_SET) != pos ||
- write(fd, data, size) != size) {
+ if (TEMP_FAILURE_RETRY(lseek(fd, pos, SEEK_SET)) != pos ||
+ TEMP_FAILURE_RETRY(write(fd, data, size)) != size) {
printf("mtd: write error at 0x%08lx (%s)\n",
pos, strerror(errno));
}
char verify[size];
- if (lseek(fd, pos, SEEK_SET) != pos ||
- read(fd, verify, size) != size) {
+ if (TEMP_FAILURE_RETRY(lseek(fd, pos, SEEK_SET)) != pos ||
+ TEMP_FAILURE_RETRY(read(fd, verify, size)) != size) {
printf("mtd: re-read error at 0x%08lx (%s)\n",
pos, strerror(errno));
continue;
@@ -522,8 +524,11 @@ off_t mtd_erase_blocks(MtdWriteContext *ctx, int blocks)
ctx->stored = 0;
}
- off_t pos = lseek(ctx->fd, 0, SEEK_CUR);
- if ((off_t) pos == (off_t) -1) return pos;
+ off_t pos = TEMP_FAILURE_RETRY(lseek(ctx->fd, 0, SEEK_CUR));
+ if ((off_t) pos == (off_t) -1) {
+ printf("mtd_erase_blocks: couldn't SEEK_CUR: %s\n", strerror(errno));
+ return -1;
+ }
const int total = (ctx->partition->size - pos) / ctx->partition->erase_size;
if (blocks < 0) blocks = total;
diff --git a/mtdutils/mtdutils.h b/mtdutils/mtdutils.h
index c57d45d50..6cbf37eec 100644
--- a/mtdutils/mtdutils.h
+++ b/mtdutils/mtdutils.h
@@ -45,12 +45,10 @@ typedef struct MtdWriteContext MtdWriteContext;
MtdReadContext *mtd_read_partition(const MtdPartition *);
ssize_t mtd_read_data(MtdReadContext *, char *data, size_t data_len);
void mtd_read_close(MtdReadContext *);
-void mtd_read_skip_to(const MtdReadContext *, size_t offset);
MtdWriteContext *mtd_write_partition(const MtdPartition *);
ssize_t mtd_write_data(MtdWriteContext *, const char *data, size_t data_len);
off_t mtd_erase_blocks(MtdWriteContext *, int blocks); /* 0 ok, -1 for all */
-off_t mtd_find_write_start(MtdWriteContext *ctx, off_t pos);
int mtd_write_close(MtdWriteContext *);
struct MtdPartition {
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-05 16:04:43 +0100