mount.c revision 4e7dd3d270aaf0b43e94b2ccaf840f86e541d21b
14f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project/* 24f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project * mount.c, by rmk 34f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project */ 44f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 54f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project#include <sys/mount.h> 64f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project#include <sys/stat.h> 74f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project#include <fcntl.h> 84f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project#include <errno.h> 94f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project#include <stdio.h> 104f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project#include <stdlib.h> 114f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project#include <string.h> 124f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project#include <unistd.h> 134f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 144f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project#include <linux/loop.h> 154f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 164f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project#define ARRAY_SIZE(x) (sizeof(x) / sizeof(x[0])) 174f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 184f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project// FIXME - only one loop mount is supported at a time 194f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project#define LOOP_DEVICE "/dev/block/loop0" 204f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 214f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Projectstruct mount_opts { 224f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project const char str[8]; 234f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project unsigned long rwmask; 244f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project unsigned long rwset; 254f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project unsigned long rwnoset; 264f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project}; 274f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 284f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Projectstruct extra_opts { 294f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project char *str; 304f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project char *end; 314f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project int used_size; 324f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project int alloc_size; 334f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project}; 344f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 354f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project/* 364f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project * These options define the function of "mount(2)". 374f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project */ 384f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project#define MS_TYPE (MS_REMOUNT|MS_BIND|MS_MOVE) 394f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 404f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 414f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Projectstatic const struct mount_opts options[] = { 424f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project /* name mask set noset */ 434f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project { "async", MS_SYNCHRONOUS, 0, MS_SYNCHRONOUS }, 444f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project { "atime", MS_NOATIME, 0, MS_NOATIME }, 454f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project { "bind", MS_TYPE, MS_BIND, 0, }, 464f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project { "dev", MS_NODEV, 0, MS_NODEV }, 474f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project { "diratime", MS_NODIRATIME, 0, MS_NODIRATIME }, 484f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project { "dirsync", MS_DIRSYNC, MS_DIRSYNC, 0 }, 494f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project { "exec", MS_NOEXEC, 0, MS_NOEXEC }, 504f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project { "move", MS_TYPE, MS_MOVE, 0 }, 514f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project { "recurse", MS_REC, MS_REC, 0 }, 524f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project { "remount", MS_TYPE, MS_REMOUNT, 0 }, 534f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project { "ro", MS_RDONLY, MS_RDONLY, 0 }, 544f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project { "rw", MS_RDONLY, 0, MS_RDONLY }, 554f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project { "suid", MS_NOSUID, 0, MS_NOSUID }, 564f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project { "sync", MS_SYNCHRONOUS, MS_SYNCHRONOUS, 0 }, 574f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project { "verbose", MS_VERBOSE, MS_VERBOSE, 0 }, 584f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project}; 594f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 604f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Projectstatic void add_extra_option(struct extra_opts *extra, char *s) 614f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project{ 624f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project int len = strlen(s); 634f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project int newlen = extra->used_size + len; 644f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 654f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if (extra->str) 664f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project len++; /* +1 for ',' */ 674f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 684f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if (newlen >= extra->alloc_size) { 694f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project char *new; 704f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 714f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project new = realloc(extra->str, newlen + 1); /* +1 for NUL */ 724f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if (!new) 734f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project return; 744f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 754f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project extra->str = new; 764f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project extra->end = extra->str + extra->used_size; 774f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project extra->alloc_size = newlen; 784f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } 794f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 804f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if (extra->used_size) { 814f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project *extra->end = ','; 824f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project extra->end++; 834f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } 844f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project strcpy(extra->end, s); 854f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project extra->used_size += len; 864f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 874f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project} 884f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 894f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Projectstatic unsigned long 904f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Projectparse_mount_options(char *arg, unsigned long rwflag, struct extra_opts *extra, int* loop) 914f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project{ 924f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project char *s; 934f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 944f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project *loop = 0; 954f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project while ((s = strsep(&arg, ",")) != NULL) { 964f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project char *opt = s; 974f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project unsigned int i; 984f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project int res, no = s[0] == 'n' && s[1] == 'o'; 994f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 1004f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if (no) 1014f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project s += 2; 1024f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 1034f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if (strcmp(s, "loop") == 0) { 1044f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project *loop = 1; 1054f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project continue; 1064f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } 1074f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project for (i = 0, res = 1; i < ARRAY_SIZE(options); i++) { 1084f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project res = strcmp(s, options[i].str); 1094f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 1104f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if (res == 0) { 1114f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project rwflag &= ~options[i].rwmask; 1124f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if (no) 1134f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project rwflag |= options[i].rwnoset; 1144f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project else 1154f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project rwflag |= options[i].rwset; 1164f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } 1174f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if (res <= 0) 1184f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project break; 1194f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } 1204f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 1214f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if (res != 0 && s[0]) 1224f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project add_extra_option(extra, opt); 1234f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } 1244f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 1254f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project return rwflag; 1264f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project} 1274f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 1284f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Projectstatic char *progname; 1294f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 1304f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Projectstatic struct extra_opts extra; 1314f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Projectstatic unsigned long rwflag; 1324f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 1334f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Projectstatic int 1344f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Projectdo_mount(char *dev, char *dir, char *type, unsigned long rwflag, void *data, int loop) 1354f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project{ 1364f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project char *s; 1374f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project int error = 0; 1384f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 1394f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if (loop) { 1404f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project int file_fd, device_fd; 141bc7b0cbe156da639f0cbe17bf89725d87e86512aJay Freeman (saurik) int flags; 142bc7b0cbe156da639f0cbe17bf89725d87e86512aJay Freeman (saurik) 143bc7b0cbe156da639f0cbe17bf89725d87e86512aJay Freeman (saurik) flags = (rwflag & MS_RDONLY) ? O_RDONLY : O_RDWR; 1444f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 1454f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project // FIXME - only one loop mount supported at a time 146bc7b0cbe156da639f0cbe17bf89725d87e86512aJay Freeman (saurik) file_fd = open(dev, flags); 1474f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if (file_fd < -1) { 1484f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project perror("open backing file failed"); 1494f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project return 1; 1504f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } 151bc7b0cbe156da639f0cbe17bf89725d87e86512aJay Freeman (saurik) device_fd = open(LOOP_DEVICE, flags); 1524f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if (device_fd < -1) { 1534f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project perror("open loop device failed"); 1544f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project close(file_fd); 1554f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project return 1; 1564f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } 1574f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if (ioctl(device_fd, LOOP_SET_FD, file_fd) < 0) { 1584f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project perror("ioctl LOOP_SET_FD failed"); 1594f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project close(file_fd); 1604f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project close(device_fd); 1614f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project return 1; 1624f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } 1634f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 1644f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project close(file_fd); 1654f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project close(device_fd); 1664f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project dev = LOOP_DEVICE; 1674f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } 1684f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 1694f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project while ((s = strsep(&type, ",")) != NULL) { 1704f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Projectretry: 1714f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if (mount(dev, dir, s, rwflag, data) == -1) { 1724f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project error = errno; 1734f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project /* 1744f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project * If the filesystem is not found, or the 1754f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project * superblock is invalid, try the next. 1764f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project */ 1774f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if (error == ENODEV || error == EINVAL) 1784f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project continue; 1794f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 1804f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project /* 1814f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project * If we get EACCESS, and we're trying to 1824f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project * mount readwrite and this isn't a remount, 1834f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project * try read only. 1844f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project */ 1854f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if (error == EACCES && 1864f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project (rwflag & (MS_REMOUNT|MS_RDONLY)) == 0) { 1874f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project rwflag |= MS_RDONLY; 1884f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project goto retry; 1894f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } 1904f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project break; 1914f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } 1924f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } 1934f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 1944f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if (error) { 1954f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project errno = error; 1964f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project perror("mount"); 1974f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project return 255; 1984f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } 1994f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 2004f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project return 0; 2014f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project} 2024f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 2034f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Projectstatic int print_mounts() 2044f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project{ 2054f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project FILE* f; 2064f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project int length; 2074f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project char buffer[100]; 2084f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 2094f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project f = fopen("/proc/mounts", "r"); 2104f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if (!f) { 2114f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project fprintf(stdout, "could not open /proc/mounts\n"); 2124f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project return -1; 2134f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } 2144f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 2154f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project do { 2164f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project length = fread(buffer, 1, 100, f); 2174f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if (length > 0) 2184f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project fwrite(buffer, 1, length, stdout); 2194f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } while (length > 0); 2204f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 2214f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project fclose(f); 2224f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project return 0; 2234f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project} 2244f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 2254e7dd3d270aaf0b43e94b2ccaf840f86e541d21bColin Crossstatic int get_mounts_dev_dir(const char *arg, char **dev, char **dir) 2264e7dd3d270aaf0b43e94b2ccaf840f86e541d21bColin Cross{ 2274e7dd3d270aaf0b43e94b2ccaf840f86e541d21bColin Cross FILE *f; 2284e7dd3d270aaf0b43e94b2ccaf840f86e541d21bColin Cross char mount_dev[256]; 2294e7dd3d270aaf0b43e94b2ccaf840f86e541d21bColin Cross char mount_dir[256]; 2304e7dd3d270aaf0b43e94b2ccaf840f86e541d21bColin Cross char mount_type[256]; 2314e7dd3d270aaf0b43e94b2ccaf840f86e541d21bColin Cross char mount_opts[256]; 2324e7dd3d270aaf0b43e94b2ccaf840f86e541d21bColin Cross int mount_freq; 2334e7dd3d270aaf0b43e94b2ccaf840f86e541d21bColin Cross int mount_passno; 2344e7dd3d270aaf0b43e94b2ccaf840f86e541d21bColin Cross int match; 2354e7dd3d270aaf0b43e94b2ccaf840f86e541d21bColin Cross 2364e7dd3d270aaf0b43e94b2ccaf840f86e541d21bColin Cross f = fopen("/proc/mounts", "r"); 2374e7dd3d270aaf0b43e94b2ccaf840f86e541d21bColin Cross if (!f) { 2384e7dd3d270aaf0b43e94b2ccaf840f86e541d21bColin Cross fprintf(stdout, "could not open /proc/mounts\n"); 2394e7dd3d270aaf0b43e94b2ccaf840f86e541d21bColin Cross return -1; 2404e7dd3d270aaf0b43e94b2ccaf840f86e541d21bColin Cross } 2414e7dd3d270aaf0b43e94b2ccaf840f86e541d21bColin Cross 2424e7dd3d270aaf0b43e94b2ccaf840f86e541d21bColin Cross do { 2434e7dd3d270aaf0b43e94b2ccaf840f86e541d21bColin Cross match = fscanf(f, "%255s %255s %255s %255s %d %d\n", 2444e7dd3d270aaf0b43e94b2ccaf840f86e541d21bColin Cross mount_dev, mount_dir, mount_type, 2454e7dd3d270aaf0b43e94b2ccaf840f86e541d21bColin Cross mount_opts, &mount_freq, &mount_passno); 2464e7dd3d270aaf0b43e94b2ccaf840f86e541d21bColin Cross mount_dev[255] = 0; 2474e7dd3d270aaf0b43e94b2ccaf840f86e541d21bColin Cross mount_dir[255] = 0; 2484e7dd3d270aaf0b43e94b2ccaf840f86e541d21bColin Cross mount_type[255] = 0; 2494e7dd3d270aaf0b43e94b2ccaf840f86e541d21bColin Cross mount_opts[255] = 0; 2504e7dd3d270aaf0b43e94b2ccaf840f86e541d21bColin Cross if (match == 6 && 2514e7dd3d270aaf0b43e94b2ccaf840f86e541d21bColin Cross (strcmp(arg, mount_dev) == 0 || 2524e7dd3d270aaf0b43e94b2ccaf840f86e541d21bColin Cross strcmp(arg, mount_dir) == 0)) { 2534e7dd3d270aaf0b43e94b2ccaf840f86e541d21bColin Cross *dev = strdup(mount_dev); 2544e7dd3d270aaf0b43e94b2ccaf840f86e541d21bColin Cross *dir = strdup(mount_dir); 2554e7dd3d270aaf0b43e94b2ccaf840f86e541d21bColin Cross fclose(f); 2564e7dd3d270aaf0b43e94b2ccaf840f86e541d21bColin Cross return 0; 2574e7dd3d270aaf0b43e94b2ccaf840f86e541d21bColin Cross } 2584e7dd3d270aaf0b43e94b2ccaf840f86e541d21bColin Cross } while (match != EOF); 2594e7dd3d270aaf0b43e94b2ccaf840f86e541d21bColin Cross 2604e7dd3d270aaf0b43e94b2ccaf840f86e541d21bColin Cross fclose(f); 2614e7dd3d270aaf0b43e94b2ccaf840f86e541d21bColin Cross return -1; 2624e7dd3d270aaf0b43e94b2ccaf840f86e541d21bColin Cross} 2634e7dd3d270aaf0b43e94b2ccaf840f86e541d21bColin Cross 2644f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Projectint mount_main(int argc, char *argv[]) 2654f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project{ 2664f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project char *type = NULL; 2674e7dd3d270aaf0b43e94b2ccaf840f86e541d21bColin Cross char *dev = NULL; 2684e7dd3d270aaf0b43e94b2ccaf840f86e541d21bColin Cross char *dir = NULL; 2694f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project int c; 270383688b52fb19b9c4d98bb1a660febc880d0e268Dima Zavin int loop = 0; 2714f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 2724f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project progname = argv[0]; 2734f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project rwflag = MS_VERBOSE; 2744f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 2754f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project // mount with no arguments is equivalent to "cat /proc/mounts" 2764f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if (argc == 1) return print_mounts(); 2774f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 2784f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project do { 2794f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project c = getopt(argc, argv, "o:rt:w"); 2804f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if (c == EOF) 2814f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project break; 2824f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project switch (c) { 2834f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project case 'o': 2844f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project rwflag = parse_mount_options(optarg, rwflag, &extra, &loop); 2854f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project break; 2864f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project case 'r': 2874f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project rwflag |= MS_RDONLY; 2884f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project break; 2894f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project case 't': 2904f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project type = optarg; 2914f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project break; 2924f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project case 'w': 2934f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project rwflag &= ~MS_RDONLY; 2944f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project break; 2954f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project case '?': 2964f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project fprintf(stderr, "%s: invalid option -%c\n", 2974f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project progname, optopt); 2984f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project exit(1); 2994f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } 3004f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } while (1); 3014f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 3024f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project /* 3034f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project * If remount, bind or move was specified, then we don't 3044f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project * have a "type" as such. Use the dummy "none" type. 3054f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project */ 3064f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if (rwflag & MS_TYPE) 3074f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project type = "none"; 3084f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 3094e7dd3d270aaf0b43e94b2ccaf840f86e541d21bColin Cross if (optind + 2 == argc) { 3104e7dd3d270aaf0b43e94b2ccaf840f86e541d21bColin Cross dev = argv[optind]; 3114e7dd3d270aaf0b43e94b2ccaf840f86e541d21bColin Cross dir = argv[optind + 1]; 3124e7dd3d270aaf0b43e94b2ccaf840f86e541d21bColin Cross } else if (optind + 1 == argc && rwflag & MS_REMOUNT) { 3134e7dd3d270aaf0b43e94b2ccaf840f86e541d21bColin Cross get_mounts_dev_dir(argv[optind], &dev, &dir); 3144e7dd3d270aaf0b43e94b2ccaf840f86e541d21bColin Cross } 3154e7dd3d270aaf0b43e94b2ccaf840f86e541d21bColin Cross 3164e7dd3d270aaf0b43e94b2ccaf840f86e541d21bColin Cross if (dev == NULL || dir == NULL || type == NULL) { 3174f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project fprintf(stderr, "Usage: %s [-r] [-w] [-o options] [-t type] " 3184f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project "device directory\n", progname); 3194f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project exit(1); 3204f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } 3214f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 3224e7dd3d270aaf0b43e94b2ccaf840f86e541d21bColin Cross return do_mount(dev, dir, type, rwflag, extra.str, loop); 3234e7dd3d270aaf0b43e94b2ccaf840f86e541d21bColin Cross /* We leak dev and dir in some cases, but we're about to exit */ 3244f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project} 325