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authorThe Android Open Source Project <initial-contribution@android.com>2009-03-04 03:28:14 +0100
committerThe Android Open Source Project <initial-contribution@android.com>2009-03-04 03:28:14 +0100
commitffb48f64fec674c6dd923eb8b1eb3f743e05a8ba (patch)
tree4b825dc642cb6eb9a060e54bf8d69288fbee4904 /mtdutils/mounts.c
parentauto import from //depot/cupcake/@132589 (diff)
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Diffstat (limited to '')
-rw-r--r--mtdutils/mounts.c214
1 files changed, 0 insertions, 214 deletions
diff --git a/mtdutils/mounts.c b/mtdutils/mounts.c
deleted file mode 100644
index 2ab3ff60c..000000000
--- a/mtdutils/mounts.c
+++ /dev/null
@@ -1,214 +0,0 @@
-/*
- * Copyright (C) 2007 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 <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <fcntl.h>
-#include <errno.h>
-#include <sys/mount.h>
-
-#include "mounts.h"
-
-struct MountedVolume {
- const char *device;
- const char *mount_point;
- const char *filesystem;
- const char *flags;
-};
-
-typedef struct {
- MountedVolume *volumes;
- int volumes_allocd;
- int volume_count;
-} MountsState;
-
-static MountsState g_mounts_state = {
- NULL, // volumes
- 0, // volumes_allocd
- 0 // volume_count
-};
-
-static inline void
-free_volume_internals(const MountedVolume *volume, int zero)
-{
- free((char *)volume->device);
- free((char *)volume->mount_point);
- free((char *)volume->filesystem);
- free((char *)volume->flags);
- if (zero) {
- memset((void *)volume, 0, sizeof(*volume));
- }
-}
-
-#define PROC_MOUNTS_FILENAME "/proc/mounts"
-
-int
-scan_mounted_volumes()
-{
- char buf[2048];
- const char *bufp;
- int fd;
- ssize_t nbytes;
-
- if (g_mounts_state.volumes == NULL) {
- const int numv = 32;
- MountedVolume *volumes = malloc(numv * sizeof(*volumes));
- if (volumes == NULL) {
- errno = ENOMEM;
- return -1;
- }
- g_mounts_state.volumes = volumes;
- g_mounts_state.volumes_allocd = numv;
- memset(volumes, 0, numv * sizeof(*volumes));
- } else {
- /* Free the old volume strings.
- */
- int i;
- for (i = 0; i < g_mounts_state.volume_count; i++) {
- free_volume_internals(&g_mounts_state.volumes[i], 1);
- }
- }
- 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;
- }
- 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--;
- }
- }
-
- return 0;
-
-bail:
-//TODO: free the strings we've allocated.
- g_mounts_state.volume_count = 0;
- return -1;
-}
-
-const MountedVolume *
-find_mounted_volume_by_device(const char *device)
-{
- if (g_mounts_state.volumes != NULL) {
- int i;
- for (i = 0; i < g_mounts_state.volume_count; i++) {
- MountedVolume *v = &g_mounts_state.volumes[i];
- /* May be null if it was unmounted and we haven't rescanned.
- */
- if (v->device != NULL) {
- if (strcmp(v->device, device) == 0) {
- return v;
- }
- }
- }
- }
- return NULL;
-}
-
-const MountedVolume *
-find_mounted_volume_by_mount_point(const char *mount_point)
-{
- if (g_mounts_state.volumes != NULL) {
- int i;
- for (i = 0; i < g_mounts_state.volume_count; i++) {
- MountedVolume *v = &g_mounts_state.volumes[i];
- /* May be null if it was unmounted and we haven't rescanned.
- */
- if (v->mount_point != NULL) {
- if (strcmp(v->mount_point, mount_point) == 0) {
- return v;
- }
- }
- }
- }
- return NULL;
-}
-
-int
-unmount_mounted_volume(const MountedVolume *volume)
-{
- /* Intentionally pass NULL to umount if the caller tries
- * to unmount a volume they already unmounted using this
- * function.
- */
- int ret = umount(volume->mount_point);
- if (ret == 0) {
- free_volume_internals(volume, 1);
- return 0;
- }
- return ret;
-}