mount.c revision 383688b52fb19b9c4d98bb1a660febc880d0e268
1dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project/* 2dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project * mount.c, by rmk 3dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project */ 4dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 5dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project#include <sys/mount.h> 6dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project#include <sys/stat.h> 7dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project#include <fcntl.h> 8dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project#include <errno.h> 9dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project#include <stdio.h> 10dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project#include <stdlib.h> 11dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project#include <string.h> 12dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project#include <unistd.h> 13dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 14dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project#include <linux/loop.h> 15dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 16dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project#define ARRAY_SIZE(x) (sizeof(x) / sizeof(x[0])) 17dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 18dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project// FIXME - only one loop mount is supported at a time 19dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project#define LOOP_DEVICE "/dev/block/loop0" 20dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 21dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Projectstruct mount_opts { 22dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project const char str[8]; 23dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project unsigned long rwmask; 24dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project unsigned long rwset; 25dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project unsigned long rwnoset; 26dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project}; 27dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 28dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Projectstruct extra_opts { 29dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project char *str; 30dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project char *end; 31dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project int used_size; 32dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project int alloc_size; 33dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project}; 34dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 35dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project/* 36dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project * These options define the function of "mount(2)". 37dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project */ 38dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project#define MS_TYPE (MS_REMOUNT|MS_BIND|MS_MOVE) 39dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 40dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 41dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Projectstatic const struct mount_opts options[] = { 42dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project /* name mask set noset */ 43dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project { "async", MS_SYNCHRONOUS, 0, MS_SYNCHRONOUS }, 44dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project { "atime", MS_NOATIME, 0, MS_NOATIME }, 45dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project { "bind", MS_TYPE, MS_BIND, 0, }, 46dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project { "dev", MS_NODEV, 0, MS_NODEV }, 47dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project { "diratime", MS_NODIRATIME, 0, MS_NODIRATIME }, 48dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project { "dirsync", MS_DIRSYNC, MS_DIRSYNC, 0 }, 49dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project { "exec", MS_NOEXEC, 0, MS_NOEXEC }, 50dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project { "move", MS_TYPE, MS_MOVE, 0 }, 51dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project { "recurse", MS_REC, MS_REC, 0 }, 52dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project { "remount", MS_TYPE, MS_REMOUNT, 0 }, 53dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project { "ro", MS_RDONLY, MS_RDONLY, 0 }, 54dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project { "rw", MS_RDONLY, 0, MS_RDONLY }, 55dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project { "suid", MS_NOSUID, 0, MS_NOSUID }, 56dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project { "sync", MS_SYNCHRONOUS, MS_SYNCHRONOUS, 0 }, 57dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project { "verbose", MS_VERBOSE, MS_VERBOSE, 0 }, 58dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project}; 59dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 60dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Projectstatic void add_extra_option(struct extra_opts *extra, char *s) 61dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project{ 62dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project int len = strlen(s); 63dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project int newlen = extra->used_size + len; 64dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 65dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project if (extra->str) 66dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project len++; /* +1 for ',' */ 67dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 68dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project if (newlen >= extra->alloc_size) { 69dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project char *new; 70dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 71dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project new = realloc(extra->str, newlen + 1); /* +1 for NUL */ 72dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project if (!new) 73dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project return; 74dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 75dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project extra->str = new; 76dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project extra->end = extra->str + extra->used_size; 77dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project extra->alloc_size = newlen; 78dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } 79dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 80dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project if (extra->used_size) { 81dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project *extra->end = ','; 82dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project extra->end++; 83dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } 84dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project strcpy(extra->end, s); 85dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project extra->used_size += len; 86dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 87dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project} 88dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 89dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Projectstatic unsigned long 90dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Projectparse_mount_options(char *arg, unsigned long rwflag, struct extra_opts *extra, int* loop) 91dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project{ 92dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project char *s; 93dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 94dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project *loop = 0; 95dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project while ((s = strsep(&arg, ",")) != NULL) { 96dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project char *opt = s; 97dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project unsigned int i; 98dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project int res, no = s[0] == 'n' && s[1] == 'o'; 99dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 100dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project if (no) 101dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project s += 2; 102dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 103dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project if (strcmp(s, "loop") == 0) { 104dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project *loop = 1; 105dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project continue; 106dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } 107dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project for (i = 0, res = 1; i < ARRAY_SIZE(options); i++) { 108dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project res = strcmp(s, options[i].str); 109dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 110dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project if (res == 0) { 111dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project rwflag &= ~options[i].rwmask; 112dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project if (no) 113dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project rwflag |= options[i].rwnoset; 114dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project else 115dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project rwflag |= options[i].rwset; 116dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } 117dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project if (res <= 0) 118dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project break; 119dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } 120dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 121dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project if (res != 0 && s[0]) 122dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project add_extra_option(extra, opt); 123dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } 124dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 125dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project return rwflag; 126dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project} 127dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 128dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Projectstatic char *progname; 129dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 130dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Projectstatic struct extra_opts extra; 131dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Projectstatic unsigned long rwflag; 132dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 133dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Projectstatic int 134dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Projectdo_mount(char *dev, char *dir, char *type, unsigned long rwflag, void *data, int loop) 135dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project{ 136dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project char *s; 137dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project int error = 0; 138dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 139dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project if (loop) { 140dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project int file_fd, device_fd; 141dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 142dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project // FIXME - only one loop mount supported at a time 143dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project file_fd = open(dev, O_RDWR); 144dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project if (file_fd < -1) { 145dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project perror("open backing file failed"); 146dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project return 1; 147dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } 148dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project device_fd = open(LOOP_DEVICE, O_RDWR); 149dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project if (device_fd < -1) { 150dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project perror("open loop device failed"); 151dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project close(file_fd); 152dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project return 1; 153dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } 154dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project if (ioctl(device_fd, LOOP_SET_FD, file_fd) < 0) { 155dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project perror("ioctl LOOP_SET_FD failed"); 156dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project close(file_fd); 157dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project close(device_fd); 158dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project return 1; 159dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } 160dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 161dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project close(file_fd); 162dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project close(device_fd); 163dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project dev = LOOP_DEVICE; 164dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } 165dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 166dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project while ((s = strsep(&type, ",")) != NULL) { 167dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Projectretry: 168dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project if (mount(dev, dir, s, rwflag, data) == -1) { 169dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project error = errno; 170dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project /* 171dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project * If the filesystem is not found, or the 172dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project * superblock is invalid, try the next. 173dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project */ 174dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project if (error == ENODEV || error == EINVAL) 175dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project continue; 176dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 177dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project /* 178dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project * If we get EACCESS, and we're trying to 179dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project * mount readwrite and this isn't a remount, 180dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project * try read only. 181dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project */ 182dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project if (error == EACCES && 183dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project (rwflag & (MS_REMOUNT|MS_RDONLY)) == 0) { 184dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project rwflag |= MS_RDONLY; 185dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project goto retry; 186dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } 187dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project break; 188dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } 189dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } 190dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 191dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project if (error) { 192dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project errno = error; 193dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project perror("mount"); 194dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project return 255; 195dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } 196dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 197dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project return 0; 198dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project} 199dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 200dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Projectstatic int print_mounts() 201dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project{ 202dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project FILE* f; 203dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project int length; 204dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project char buffer[100]; 205dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 206dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project f = fopen("/proc/mounts", "r"); 207dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project if (!f) { 208dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project fprintf(stdout, "could not open /proc/mounts\n"); 209dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project return -1; 210dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } 211dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 212dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project do { 213dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project length = fread(buffer, 1, 100, f); 214dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project if (length > 0) 215dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project fwrite(buffer, 1, length, stdout); 216dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } while (length > 0); 217dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 218dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project fclose(f); 219dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project return 0; 220dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project} 221dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 222dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Projectint mount_main(int argc, char *argv[]) 223dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project{ 224dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project char *type = NULL; 225dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project int c; 226383688b52fb19b9c4d98bb1a660febc880d0e268Dima Zavin int loop = 0; 227dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 228dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project progname = argv[0]; 229dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project rwflag = MS_VERBOSE; 230dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 231dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project // mount with no arguments is equivalent to "cat /proc/mounts" 232dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project if (argc == 1) return print_mounts(); 233dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 234dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project do { 235dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project c = getopt(argc, argv, "o:rt:w"); 236dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project if (c == EOF) 237dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project break; 238dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project switch (c) { 239dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project case 'o': 240dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project rwflag = parse_mount_options(optarg, rwflag, &extra, &loop); 241dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project break; 242dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project case 'r': 243dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project rwflag |= MS_RDONLY; 244dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project break; 245dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project case 't': 246dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project type = optarg; 247dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project break; 248dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project case 'w': 249dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project rwflag &= ~MS_RDONLY; 250dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project break; 251dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project case '?': 252dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project fprintf(stderr, "%s: invalid option -%c\n", 253dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project progname, optopt); 254dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project exit(1); 255dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } 256dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } while (1); 257dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 258dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project /* 259dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project * If remount, bind or move was specified, then we don't 260dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project * have a "type" as such. Use the dummy "none" type. 261dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project */ 262dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project if (rwflag & MS_TYPE) 263dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project type = "none"; 264dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 265dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project if (optind + 2 != argc || type == NULL) { 266dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project fprintf(stderr, "Usage: %s [-r] [-w] [-o options] [-t type] " 267dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project "device directory\n", progname); 268dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project exit(1); 269dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } 270dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 271dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project return do_mount(argv[optind], argv[optind + 1], type, rwflag, 272dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project extra.str, loop); 273dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project} 274