* Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
*/
-/* todo:
- * bb_getopt_ulflags();
- */
-
/* Design notes: There is no spec for mount. Remind me to write one.
mount_main() calls singlemount() which calls mount_it_now().
mount_it_now() does the actual mount.
*/
-#include "busybox.h"
-#include <unistd.h>
-#include <errno.h>
-#include <string.h>
#include <mntent.h>
-#include <ctype.h>
-#include <fcntl.h> // for CONFIG_FEATURE_MOUNT_LOOP
-#include <sys/ioctl.h> // for CONFIG_FEATURE_MOUNT_LOOP
+#include "libbb.h"
+
+/* Needed for nfs support only... */
+#include <syslog.h>
+#include <sys/utsname.h>
+#undef TRUE
+#undef FALSE
+#include <rpc/rpc.h>
+#include <rpc/pmap_prot.h>
+#include <rpc/pmap_clnt.h>
-// These two aren't always defined in old headers
-#ifndef MS_BIND
-#define MS_BIND 4096
-#endif
-#ifndef MS_MOVE
-#define MS_MOVE 8192
-#endif
#ifndef MS_SILENT
-#define MS_SILENT 32768
+#define MS_SILENT (1 << 15)
#endif
+#if defined(__dietlibc__)
+/* 16.12.2006, Sampo Kellomaki (sampo@iki.fi)
+ * dietlibc-0.30 does not have implementation of getmntent_r() */
+struct mntent *getmntent_r(FILE* stream, struct mntent* result, char* buffer, int bufsize)
+{
+ struct mntent* ment = getmntent(stream);
+ memcpy(result, ment, sizeof(struct mntent));
+ return result;
+}
+#endif
+
+#define getmntent_buf bb_common_bufsiz1
+
+
// Not real flags, but we want to be able to check for this.
-#define MOUNT_NOAUTO (1<<29)
-#define MOUNT_SWAP (1<<30)
+enum {
+ MOUNT_USERS = (1<<28)*ENABLE_DESKTOP,
+ MOUNT_NOAUTO = (1<<29),
+ MOUNT_SWAP = (1<<30),
+};
+// TODO: more "user" flag compatibility.
+// "user" option (from mount manpage):
+// Only the user that mounted a filesystem can unmount it again.
+// If any user should be able to unmount, then use users instead of user
+// in the fstab line. The owner option is similar to the user option,
+// with the restriction that the user must be the owner of the special file.
+// This may be useful e.g. for /dev/fd if a login script makes
+// the console user owner of this device.
+
/* Standard mount options (from -o options or --options), with corresponding
* flags */
-struct {
+static const struct {
const char *name;
long flags;
-} static const mount_options[] = {
- // NOP flags.
-
- {"loop", 0},
- {"defaults", 0},
- {"quiet", 0},
-
- // vfs flags
-
- {"ro", MS_RDONLY},
- {"rw", ~MS_RDONLY},
- {"nosuid", MS_NOSUID},
- {"suid", ~MS_NOSUID},
- {"dev", ~MS_NODEV},
- {"nodev", MS_NODEV},
- {"exec", ~MS_NOEXEC},
- {"noexec", MS_NOEXEC},
- {"sync", MS_SYNCHRONOUS},
- {"async", ~MS_SYNCHRONOUS},
- {"atime", ~MS_NOATIME},
- {"noatime", MS_NOATIME},
- {"diratime", ~MS_NODIRATIME},
- {"nodiratime", MS_NODIRATIME},
- {"loud", ~MS_SILENT},
-
- // action flags
-
- {"remount", MS_REMOUNT},
- {"bind", MS_BIND},
- {"move", MS_MOVE},
- {"noauto",MOUNT_NOAUTO},
- {"swap",MOUNT_SWAP}
+} mount_options[] = {
+ // MS_FLAGS set a bit. ~MS_FLAGS disable that bit. 0 flags are NOPs.
+
+ USE_FEATURE_MOUNT_LOOP(
+ {"loop", 0},
+ )
+
+ USE_FEATURE_MOUNT_FSTAB(
+ {"defaults", 0},
+ /* {"quiet", 0}, - do not filter out, vfat wants to see it */
+ {"noauto", MOUNT_NOAUTO},
+ {"sw", MOUNT_SWAP},
+ {"swap", MOUNT_SWAP},
+ USE_DESKTOP({"user", MOUNT_USERS},)
+ USE_DESKTOP({"users", MOUNT_USERS},)
+ )
+
+ USE_FEATURE_MOUNT_FLAGS(
+ // vfs flags
+ {"nosuid", MS_NOSUID},
+ {"suid", ~MS_NOSUID},
+ {"dev", ~MS_NODEV},
+ {"nodev", MS_NODEV},
+ {"exec", ~MS_NOEXEC},
+ {"noexec", MS_NOEXEC},
+ {"sync", MS_SYNCHRONOUS},
+ {"async", ~MS_SYNCHRONOUS},
+ {"atime", ~MS_NOATIME},
+ {"noatime", MS_NOATIME},
+ {"diratime", ~MS_NODIRATIME},
+ {"nodiratime", MS_NODIRATIME},
+ {"loud", ~MS_SILENT},
+
+ // action flags
+
+ {"bind", MS_BIND},
+ {"move", MS_MOVE},
+ {"shared", MS_SHARED},
+ {"slave", MS_SLAVE},
+ {"private", MS_PRIVATE},
+ {"unbindable", MS_UNBINDABLE},
+ {"rshared", MS_SHARED|MS_RECURSIVE},
+ {"rslave", MS_SLAVE|MS_RECURSIVE},
+ {"rprivate", MS_SLAVE|MS_RECURSIVE},
+ {"runbindable", MS_UNBINDABLE|MS_RECURSIVE},
+ )
+
+ // Always understood.
+
+ {"ro", MS_RDONLY}, // vfs flag
+ {"rw", ~MS_RDONLY}, // vfs flag
+ {"remount", MS_REMOUNT}, // action flag
};
+
/* Append mount options to string */
-static void append_mount_options(char **oldopts, char *newopts)
+static void append_mount_options(char **oldopts, const char *newopts)
{
- if(*oldopts && **oldopts) {
- char *temp=bb_xasprintf("%s,%s",*oldopts,newopts);
- free(*oldopts);
- *oldopts=temp;
+ if (*oldopts && **oldopts) {
+ /* do not insert options which are already there */
+ while (newopts[0]) {
+ char *p;
+ int len = strlen(newopts);
+ p = strchr(newopts, ',');
+ if (p) len = p - newopts;
+ p = *oldopts;
+ while (1) {
+ if (!strncmp(p, newopts, len)
+ && (p[len]==',' || p[len]==0))
+ goto skip;
+ p = strchr(p,',');
+ if (!p) break;
+ p++;
+ }
+ p = xasprintf("%s,%.*s", *oldopts, len, newopts);
+ free(*oldopts);
+ *oldopts = p;
+skip:
+ newopts += len;
+ while (newopts[0] == ',') newopts++;
+ }
} else {
if (ENABLE_FEATURE_CLEAN_UP) free(*oldopts);
- *oldopts = bb_xstrdup(newopts);
+ *oldopts = xstrdup(newopts);
}
}
/* Use the mount_options list to parse options into flags.
- * Return list of unrecognized options in *strflags if strflags!=NULL */
+ * Also return list of unrecognized options if unrecognized!=NULL */
static int parse_mount_options(char *options, char **unrecognized)
{
int flags = MS_SILENT;
if (comma) *comma = 0;
// Find this option in mount_options
- for (i = 0; i < (sizeof(mount_options) / sizeof(*mount_options)); i++) {
+ for (i = 0; i < ARRAY_SIZE(mount_options); i++) {
if (!strcasecmp(mount_options[i].name, options)) {
long fl = mount_options[i].flags;
- if(fl < 0) flags &= fl;
+ if (fl < 0) flags &= fl;
else flags |= fl;
break;
}
}
// If unrecognized not NULL, append unrecognized mount options */
- if (unrecognized
- && i == (sizeof(mount_options) / sizeof(*mount_options)))
- {
+ if (unrecognized && i == ARRAY_SIZE(mount_options)) {
// Add it to strflags, to pass on to kernel
i = *unrecognized ? strlen(*unrecognized) : 0;
*unrecognized = xrealloc(*unrecognized, i+strlen(options)+2);
strcpy((*unrecognized)+i, options);
}
- // Advance to next option, or finish
- if(comma) {
- *comma = ',';
- options = ++comma;
- } else break;
+ if (!comma)
+ break;
+ // Advance to next option
+ *comma = ',';
+ options = ++comma;
}
return flags;
static llist_t *get_block_backed_filesystems(void)
{
- char *fs, *buf,
- *filesystems[] = {"/etc/filesystems", "/proc/filesystems", 0};
+ static const char filesystems[2][sizeof("/proc/filesystems")] = {
+ "/etc/filesystems",
+ "/proc/filesystems",
+ };
+ char *fs, *buf;
llist_t *list = 0;
int i;
FILE *f;
- for(i = 0; filesystems[i]; i++) {
- if(!(f = fopen(filesystems[i], "r"))) continue;
-
- for(fs = buf = 0; (fs = buf = bb_get_chomped_line_from_file(f));
- free(buf))
- {
- if(!strncmp(buf,"nodev",5) && isspace(buf[5])) continue;
+ for (i = 0; i < 2; i++) {
+ f = fopen(filesystems[i], "r");
+ if (!f) continue;
- while(isspace(*fs)) fs++;
- if(*fs=='#' || *fs=='*') continue;
- if(!*fs) continue;
+ while ((buf = xmalloc_getline(f)) != 0) {
+ if (!strncmp(buf, "nodev", 5) && isspace(buf[5]))
+ continue;
+ fs = skip_whitespace(buf);
+ if (*fs=='#' || *fs=='*' || !*fs) continue;
- llist_add_to_end(&list,bb_xstrdup(fs));
+ llist_add_to_end(&list, xstrdup(fs));
+ free(buf);
}
if (ENABLE_FEATURE_CLEAN_UP) fclose(f);
}
return list;
}
-llist_t *fslist = 0;
+static llist_t *fslist;
#if ENABLE_FEATURE_CLEAN_UP
static void delete_block_backed_filesystems(void)
#endif
#if ENABLE_FEATURE_MTAB_SUPPORT
-static int useMtab;
+static int useMtab = 1;
static int fakeIt;
#else
#define useMtab 0
#endif
// Perform actual mount of specific filesystem at specific location.
-
+// NB: mp->xxx fields may be trashed on exit
static int mount_it_now(struct mntent *mp, int vfsflags, char *filteropts)
{
- int rc;
+ int rc = 0;
- if (fakeIt) { return 0; }
+ if (fakeIt) goto mtab;
// Mount, with fallback to read-only if necessary.
- for(;;) {
+ for (;;) {
rc = mount(mp->mnt_fsname, mp->mnt_dir, mp->mnt_type,
vfsflags, filteropts);
- if(!rc || (vfsflags&MS_RDONLY) || (errno!=EACCES && errno!=EROFS))
+ if (!rc || (vfsflags&MS_RDONLY) || (errno!=EACCES && errno!=EROFS))
break;
- bb_error_msg("%s is write-protected, mounting read-only",
- mp->mnt_fsname);
+ if (!(vfsflags & MS_SILENT))
+ bb_error_msg("%s is write-protected, mounting read-only",
+ mp->mnt_fsname);
vfsflags |= MS_RDONLY;
}
/* If the mount was successful, and we're maintaining an old-style
* mtab file by hand, add the new entry to it now. */
-
- if(ENABLE_FEATURE_MTAB_SUPPORT && useMtab && !rc) {
+ mtab:
+ if (ENABLE_FEATURE_MTAB_SUPPORT && useMtab && !rc && !(vfsflags & MS_REMOUNT)) {
+ char *fsname;
FILE *mountTable = setmntent(bb_path_mtab_file, "a+");
int i;
- if(!mountTable)
- bb_error_msg("No %s\n",bb_path_mtab_file);
+ if (!mountTable) {
+ bb_error_msg("no %s",bb_path_mtab_file);
+ goto ret;
+ }
// Add vfs string flags
- for(i=0; mount_options[i].flags != MS_REMOUNT; i++)
- if (mount_options[i].flags > 0)
- append_mount_options(&(mp->mnt_opts),
-// Shut up about the darn const. It's not important. I don't care.
- (char *)mount_options[i].name);
+ for (i=0; mount_options[i].flags != MS_REMOUNT; i++)
+ if (mount_options[i].flags > 0 && (mount_options[i].flags & vfsflags))
+ append_mount_options(&(mp->mnt_opts), mount_options[i].name);
// Remove trailing / (if any) from directory we mounted on
- i = strlen(mp->mnt_dir);
- if(i>1 && mp->mnt_dir[i-1] == '/') mp->mnt_dir[i-1] = 0;
+ i = strlen(mp->mnt_dir) - 1;
+ if (i > 0 && mp->mnt_dir[i] == '/') mp->mnt_dir[i] = 0;
+
+ // Convert to canonical pathnames as needed
+
+ mp->mnt_dir = bb_simplify_path(mp->mnt_dir);
+ fsname = 0;
+ if (!mp->mnt_type || !*mp->mnt_type) { /* bind mount */
+ mp->mnt_fsname = fsname = bb_simplify_path(mp->mnt_fsname);
+ mp->mnt_type = (char*)"bind";
+ }
+ mp->mnt_freq = mp->mnt_passno = 0;
// Write and close.
- if(!mp->mnt_type || !*mp->mnt_type) mp->mnt_type="--bind";
addmntent(mountTable, mp);
endmntent(mountTable);
- if (ENABLE_FEATURE_CLEAN_UP)
- if(strcmp(mp->mnt_type,"--bind")) mp->mnt_type = 0;
+ if (ENABLE_FEATURE_CLEAN_UP) {
+ free(mp->mnt_dir);
+ free(fsname);
+ }
}
-
+ ret:
return rc;
}
+#if ENABLE_FEATURE_MOUNT_NFS
+
+/*
+ * Linux NFS mount
+ * Copyright (C) 1993 Rick Sladkey <jrs@world.std.com>
+ *
+ * Licensed under GPLv2, see file LICENSE in this tarball for details.
+ *
+ * Wed Feb 8 12:51:48 1995, biro@yggdrasil.com (Ross Biro): allow all port
+ * numbers to be specified on the command line.
+ *
+ * Fri, 8 Mar 1996 18:01:39, Swen Thuemmler <swen@uni-paderborn.de>:
+ * Omit the call to connect() for Linux version 1.3.11 or later.
+ *
+ * Wed Oct 1 23:55:28 1997: Dick Streefland <dick_streefland@tasking.com>
+ * Implemented the "bg", "fg" and "retry" mount options for NFS.
+ *
+ * 1999-02-22 Arkadiusz Mi¶kiewicz <misiek@misiek.eu.org>
+ * - added Native Language Support
+ *
+ * Modified by Olaf Kirch and Trond Myklebust for new NFS code,
+ * plus NFSv3 stuff.
+ */
+
+/* This is just a warning of a common mistake. Possibly this should be a
+ * uclibc faq entry rather than in busybox... */
+#if defined(__UCLIBC__) && ! defined(__UCLIBC_HAS_RPC__)
+#error "You need to build uClibc with UCLIBC_HAS_RPC for NFS support."
+#endif
+
+#define MOUNTPORT 635
+#define MNTPATHLEN 1024
+#define MNTNAMLEN 255
+#define FHSIZE 32
+#define FHSIZE3 64
+
+typedef char fhandle[FHSIZE];
+
+typedef struct {
+ unsigned int fhandle3_len;
+ char *fhandle3_val;
+} fhandle3;
+
+enum mountstat3 {
+ MNT_OK = 0,
+ MNT3ERR_PERM = 1,
+ MNT3ERR_NOENT = 2,
+ MNT3ERR_IO = 5,
+ MNT3ERR_ACCES = 13,
+ MNT3ERR_NOTDIR = 20,
+ MNT3ERR_INVAL = 22,
+ MNT3ERR_NAMETOOLONG = 63,
+ MNT3ERR_NOTSUPP = 10004,
+ MNT3ERR_SERVERFAULT = 10006,
+};
+typedef enum mountstat3 mountstat3;
+
+struct fhstatus {
+ unsigned int fhs_status;
+ union {
+ fhandle fhs_fhandle;
+ } fhstatus_u;
+};
+typedef struct fhstatus fhstatus;
+
+struct mountres3_ok {
+ fhandle3 fhandle;
+ struct {
+ unsigned int auth_flavours_len;
+ char *auth_flavours_val;
+ } auth_flavours;
+};
+typedef struct mountres3_ok mountres3_ok;
+
+struct mountres3 {
+ mountstat3 fhs_status;
+ union {
+ mountres3_ok mountinfo;
+ } mountres3_u;
+};
+typedef struct mountres3 mountres3;
+
+typedef char *dirpath;
+
+typedef char *name;
+
+typedef struct mountbody *mountlist;
+
+struct mountbody {
+ name ml_hostname;
+ dirpath ml_directory;
+ mountlist ml_next;
+};
+typedef struct mountbody mountbody;
+
+typedef struct groupnode *groups;
+
+struct groupnode {
+ name gr_name;
+ groups gr_next;
+};
+typedef struct groupnode groupnode;
+
+typedef struct exportnode *exports;
+
+struct exportnode {
+ dirpath ex_dir;
+ groups ex_groups;
+ exports ex_next;
+};
+typedef struct exportnode exportnode;
+
+struct ppathcnf {
+ int pc_link_max;
+ short pc_max_canon;
+ short pc_max_input;
+ short pc_name_max;
+ short pc_path_max;
+ short pc_pipe_buf;
+ uint8_t pc_vdisable;
+ char pc_xxx;
+ short pc_mask[2];
+};
+typedef struct ppathcnf ppathcnf;
+
+#define MOUNTPROG 100005
+#define MOUNTVERS 1
+
+#define MOUNTPROC_NULL 0
+#define MOUNTPROC_MNT 1
+#define MOUNTPROC_DUMP 2
+#define MOUNTPROC_UMNT 3
+#define MOUNTPROC_UMNTALL 4
+#define MOUNTPROC_EXPORT 5
+#define MOUNTPROC_EXPORTALL 6
+
+#define MOUNTVERS_POSIX 2
+
+#define MOUNTPROC_PATHCONF 7
+
+#define MOUNT_V3 3
+
+#define MOUNTPROC3_NULL 0
+#define MOUNTPROC3_MNT 1
+#define MOUNTPROC3_DUMP 2
+#define MOUNTPROC3_UMNT 3
+#define MOUNTPROC3_UMNTALL 4
+#define MOUNTPROC3_EXPORT 5
+
+enum {
+#ifndef NFS_FHSIZE
+ NFS_FHSIZE = 32,
+#endif
+#ifndef NFS_PORT
+ NFS_PORT = 2049
+#endif
+};
+
+/*
+ * We want to be able to compile mount on old kernels in such a way
+ * that the binary will work well on more recent kernels.
+ * Thus, if necessary we teach nfsmount.c the structure of new fields
+ * that will come later.
+ *
+ * Moreover, the new kernel includes conflict with glibc includes
+ * so it is easiest to ignore the kernel altogether (at compile time).
+ */
+
+struct nfs2_fh {
+ char data[32];
+};
+struct nfs3_fh {
+ unsigned short size;
+ unsigned char data[64];
+};
+
+struct nfs_mount_data {
+ int version; /* 1 */
+ int fd; /* 1 */
+ struct nfs2_fh old_root; /* 1 */
+ int flags; /* 1 */
+ int rsize; /* 1 */
+ int wsize; /* 1 */
+ int timeo; /* 1 */
+ int retrans; /* 1 */
+ int acregmin; /* 1 */
+ int acregmax; /* 1 */
+ int acdirmin; /* 1 */
+ int acdirmax; /* 1 */
+ struct sockaddr_in addr; /* 1 */
+ char hostname[256]; /* 1 */
+ int namlen; /* 2 */
+ unsigned int bsize; /* 3 */
+ struct nfs3_fh root; /* 4 */
+};
+
+/* bits in the flags field */
+enum {
+ NFS_MOUNT_SOFT = 0x0001, /* 1 */
+ NFS_MOUNT_INTR = 0x0002, /* 1 */
+ NFS_MOUNT_SECURE = 0x0004, /* 1 */
+ NFS_MOUNT_POSIX = 0x0008, /* 1 */
+ NFS_MOUNT_NOCTO = 0x0010, /* 1 */
+ NFS_MOUNT_NOAC = 0x0020, /* 1 */
+ NFS_MOUNT_TCP = 0x0040, /* 2 */
+ NFS_MOUNT_VER3 = 0x0080, /* 3 */
+ NFS_MOUNT_KERBEROS = 0x0100, /* 3 */
+ NFS_MOUNT_NONLM = 0x0200 /* 3 */
+};
+
+
+/*
+ * We need to translate between nfs status return values and
+ * the local errno values which may not be the same.
+ *
+ * Andreas Schwab <schwab@LS5.informatik.uni-dortmund.de>: change errno:
+ * "after #include <errno.h> the symbol errno is reserved for any use,
+ * it cannot even be used as a struct tag or field name".
+ */
+
+#ifndef EDQUOT
+#define EDQUOT ENOSPC
+#endif
+
+// Convert each NFSERR_BLAH into EBLAH
+
+static const struct {
+ int stat;
+ int errnum;
+} nfs_errtbl[] = {
+ {0,0}, {1,EPERM}, {2,ENOENT}, {5,EIO}, {6,ENXIO}, {13,EACCES}, {17,EEXIST},
+ {19,ENODEV}, {20,ENOTDIR}, {21,EISDIR}, {22,EINVAL}, {27,EFBIG},
+ {28,ENOSPC}, {30,EROFS}, {63,ENAMETOOLONG}, {66,ENOTEMPTY}, {69,EDQUOT},
+ {70,ESTALE}, {71,EREMOTE}, {-1,EIO}
+};
+
+static char *nfs_strerror(int status)
+{
+ int i;
+
+ for (i = 0; nfs_errtbl[i].stat != -1; i++) {
+ if (nfs_errtbl[i].stat == status)
+ return strerror(nfs_errtbl[i].errnum);
+ }
+ return xasprintf("unknown nfs status return value: %d", status);
+}
+
+static bool_t xdr_fhandle(XDR *xdrs, fhandle objp)
+{
+ if (!xdr_opaque(xdrs, objp, FHSIZE))
+ return FALSE;
+ return TRUE;
+}
+
+static bool_t xdr_fhstatus(XDR *xdrs, fhstatus *objp)
+{
+ if (!xdr_u_int(xdrs, &objp->fhs_status))
+ return FALSE;
+ switch (objp->fhs_status) {
+ case 0:
+ if (!xdr_fhandle(xdrs, objp->fhstatus_u.fhs_fhandle))
+ return FALSE;
+ break;
+ default:
+ break;
+ }
+ return TRUE;
+}
-// Mount one directory. Handles NFS, loopback, autobind, and filesystem type
-// detection. Returns 0 for success, nonzero for failure.
+static bool_t xdr_dirpath(XDR *xdrs, dirpath *objp)
+{
+ if (!xdr_string(xdrs, objp, MNTPATHLEN))
+ return FALSE;
+ return TRUE;
+}
-static int singlemount(struct mntent *mp)
+static bool_t xdr_fhandle3(XDR *xdrs, fhandle3 *objp)
{
- int rc = 1, vfsflags;
+ if (!xdr_bytes(xdrs, (char **)&objp->fhandle3_val, (unsigned int *) &objp->fhandle3_len, FHSIZE3))
+ return FALSE;
+ return TRUE;
+}
+
+static bool_t xdr_mountres3_ok(XDR *xdrs, mountres3_ok *objp)
+{
+ if (!xdr_fhandle3(xdrs, &objp->fhandle))
+ return FALSE;
+ if (!xdr_array(xdrs, &(objp->auth_flavours.auth_flavours_val), &(objp->auth_flavours.auth_flavours_len), ~0,
+ sizeof (int), (xdrproc_t) xdr_int))
+ return FALSE;
+ return TRUE;
+}
+
+static bool_t xdr_mountstat3(XDR *xdrs, mountstat3 *objp)
+{
+ if (!xdr_enum(xdrs, (enum_t *) objp))
+ return FALSE;
+ return TRUE;
+}
+
+static bool_t xdr_mountres3(XDR *xdrs, mountres3 *objp)
+{
+ if (!xdr_mountstat3(xdrs, &objp->fhs_status))
+ return FALSE;
+ switch (objp->fhs_status) {
+ case MNT_OK:
+ if (!xdr_mountres3_ok(xdrs, &objp->mountres3_u.mountinfo))
+ return FALSE;
+ break;
+ default:
+ break;
+ }
+ return TRUE;
+}
+
+#define MAX_NFSPROT ((nfs_mount_version >= 4) ? 3 : 2)
+
+static smalluint nfs_mount_version;
+
+/*
+ * Unfortunately, the kernel prints annoying console messages
+ * in case of an unexpected nfs mount version (instead of
+ * just returning some error). Therefore we'll have to try
+ * and figure out what version the kernel expects.
+ *
+ * Variables:
+ * KERNEL_NFS_MOUNT_VERSION: kernel sources at compile time
+ * NFS_MOUNT_VERSION: these nfsmount sources at compile time
+ * nfs_mount_version: version this source and running kernel can handle
+ */
+static void
+find_kernel_nfs_mount_version(void)
+{
+ int kernel_version;
+
+ if (nfs_mount_version)
+ return;
+
+ nfs_mount_version = 4; /* default */
+
+ kernel_version = get_linux_version_code();
+ if (kernel_version) {
+ if (kernel_version < KERNEL_VERSION(2,1,32))
+ nfs_mount_version = 1;
+ else if (kernel_version < KERNEL_VERSION(2,2,18) ||
+ (kernel_version >= KERNEL_VERSION(2,3,0) &&
+ kernel_version < KERNEL_VERSION(2,3,99)))
+ nfs_mount_version = 3;
+ /* else v4 since 2.3.99pre4 */
+ }
+}
+
+static void
+get_mountport(struct pmap *pm_mnt,
+ struct sockaddr_in *server_addr,
+ long unsigned prog,
+ long unsigned version,
+ long unsigned proto,
+ long unsigned port)
+{
+ struct pmaplist *pmap;
+
+ server_addr->sin_port = PMAPPORT;
+/* glibc 2.4 (still) has pmap_getmaps(struct sockaddr_in *).
+ * I understand it like "IPv6 for this is not 100% ready" */
+ pmap = pmap_getmaps(server_addr);
+
+ if (version > MAX_NFSPROT)
+ version = MAX_NFSPROT;
+ if (!prog)
+ prog = MOUNTPROG;
+ pm_mnt->pm_prog = prog;
+ pm_mnt->pm_vers = version;
+ pm_mnt->pm_prot = proto;
+ pm_mnt->pm_port = port;
+
+ while (pmap) {
+ if (pmap->pml_map.pm_prog != prog)
+ goto next;
+ if (!version && pm_mnt->pm_vers > pmap->pml_map.pm_vers)
+ goto next;
+ if (version > 2 && pmap->pml_map.pm_vers != version)
+ goto next;
+ if (version && version <= 2 && pmap->pml_map.pm_vers > 2)
+ goto next;
+ if (pmap->pml_map.pm_vers > MAX_NFSPROT ||
+ (proto && pm_mnt->pm_prot && pmap->pml_map.pm_prot != proto) ||
+ (port && pmap->pml_map.pm_port != port))
+ goto next;
+ memcpy(pm_mnt, &pmap->pml_map, sizeof(*pm_mnt));
+ next:
+ pmap = pmap->pml_next;
+ }
+ if (!pm_mnt->pm_vers)
+ pm_mnt->pm_vers = MOUNTVERS;
+ if (!pm_mnt->pm_port)
+ pm_mnt->pm_port = MOUNTPORT;
+ if (!pm_mnt->pm_prot)
+ pm_mnt->pm_prot = IPPROTO_TCP;
+}
+
+#if BB_MMU
+static int daemonize(void)
+{
+ int fd;
+ int pid = fork();
+ if (pid < 0) /* error */
+ return -errno;
+ if (pid > 0) /* parent */
+ return 0;
+ /* child */
+ fd = xopen(bb_dev_null, O_RDWR);
+ dup2(fd, 0);
+ dup2(fd, 1);
+ dup2(fd, 2);
+ while (fd > 2) close(fd--);
+ setsid();
+ openlog(applet_name, LOG_PID, LOG_DAEMON);
+ logmode = LOGMODE_SYSLOG;
+ return 1;
+}
+#else
+static inline int daemonize(void) { return -ENOSYS; }
+#endif
+
+// TODO
+static inline int we_saw_this_host_before(const char *hostname)
+{
+ return 0;
+}
+
+/* RPC strerror analogs are terminally idiotic:
+ * *mandatory* prefix and \n at end.
+ * This hopefully helps. Usage:
+ * error_msg_rpc(clnt_*error*(" ")) */
+static void error_msg_rpc(const char *msg)
+{
+ int len;
+ while (msg[0] == ' ' || msg[0] == ':') msg++;
+ len = strlen(msg);
+ while (len && msg[len-1] == '\n') len--;
+ bb_error_msg("%.*s", len, msg);
+}
+
+// NB: mp->xxx fields may be trashed on exit
+static int nfsmount(struct mntent *mp, int vfsflags, char *filteropts)
+{
+ CLIENT *mclient;
+ char *hostname;
+ char *pathname;
+ char *mounthost;
+ struct nfs_mount_data data;
+ char *opt;
+ struct hostent *hp;
+ struct sockaddr_in server_addr;
+ struct sockaddr_in mount_server_addr;
+ int msock, fsock;
+ union {
+ struct fhstatus nfsv2;
+ struct mountres3 nfsv3;
+ } status;
+ int daemonized;
+ char *s;
+ int port;
+ int mountport;
+ int proto;
+#if BB_MMU
+ int bg = 0;
+#else
+ enum { bg = 0 };
+#endif
+ int soft;
+ int intr;
+ int posix;
+ int nocto;
+ int noac;
+ int nolock;
+ int retry;
+ int tcp;
+ int mountprog;
+ int mountvers;
+ int nfsprog;
+ int nfsvers;
+ int retval;
+
+ find_kernel_nfs_mount_version();
+
+ daemonized = 0;
+ mounthost = NULL;
+ retval = ETIMEDOUT;
+ msock = fsock = -1;
+ mclient = NULL;
+
+ /* NB: hostname, mounthost, filteropts must be free()d prior to return */
+
+ filteropts = xstrdup(filteropts); /* going to trash it later... */
+
+ hostname = xstrdup(mp->mnt_fsname);
+ /* mount_main() guarantees that ':' is there */
+ s = strchr(hostname, ':');
+ pathname = s + 1;
+ *s = '\0';
+ /* Ignore all but first hostname in replicated mounts
+ until they can be fully supported. (mack@sgi.com) */
+ s = strchr(hostname, ',');
+ if (s) {
+ *s = '\0';
+ bb_error_msg("warning: multiple hostnames not supported");
+ }
+
+ server_addr.sin_family = AF_INET;
+ if (!inet_aton(hostname, &server_addr.sin_addr)) {
+ hp = gethostbyname(hostname);
+ if (hp == NULL) {
+ bb_herror_msg("%s", hostname);
+ goto fail;
+ }
+ if (hp->h_length > sizeof(struct in_addr)) {
+ bb_error_msg("got bad hp->h_length");
+ hp->h_length = sizeof(struct in_addr);
+ }
+ memcpy(&server_addr.sin_addr,
+ hp->h_addr, hp->h_length);
+ }
+
+ memcpy(&mount_server_addr, &server_addr, sizeof(mount_server_addr));
+
+ /* add IP address to mtab options for use when unmounting */
+
+ if (!mp->mnt_opts) { /* TODO: actually mp->mnt_opts is never NULL */
+ mp->mnt_opts = xasprintf("addr=%s", inet_ntoa(server_addr.sin_addr));
+ } else {
+ char *tmp = xasprintf("%s%saddr=%s", mp->mnt_opts,
+ mp->mnt_opts[0] ? "," : "",
+ inet_ntoa(server_addr.sin_addr));
+ free(mp->mnt_opts);
+ mp->mnt_opts = tmp;
+ }
+
+ /* Set default options.
+ * rsize/wsize (and bsize, for ver >= 3) are left 0 in order to
+ * let the kernel decide.
+ * timeo is filled in after we know whether it'll be TCP or UDP. */
+ memset(&data, 0, sizeof(data));
+ data.retrans = 3;
+ data.acregmin = 3;
+ data.acregmax = 60;
+ data.acdirmin = 30;
+ data.acdirmax = 60;
+ data.namlen = NAME_MAX;
+
+ soft = 0;
+ intr = 0;
+ posix = 0;
+ nocto = 0;
+ nolock = 0;
+ noac = 0;
+ retry = 10000; /* 10000 minutes ~ 1 week */
+ tcp = 0;
+
+ mountprog = MOUNTPROG;
+ mountvers = 0;
+ port = 0;
+ mountport = 0;
+ nfsprog = 100003;
+ nfsvers = 0;
+
+ /* parse options */
+ if (filteropts) for (opt = strtok(filteropts, ","); opt; opt = strtok(NULL, ",")) {
+ char *opteq = strchr(opt, '=');
+ if (opteq) {
+ static const char options[] ALIGN1 =
+ /* 0 */ "rsize\0"
+ /* 1 */ "wsize\0"
+ /* 2 */ "timeo\0"
+ /* 3 */ "retrans\0"
+ /* 4 */ "acregmin\0"
+ /* 5 */ "acregmax\0"
+ /* 6 */ "acdirmin\0"
+ /* 7 */ "acdirmax\0"
+ /* 8 */ "actimeo\0"
+ /* 9 */ "retry\0"
+ /* 10 */ "port\0"
+ /* 11 */ "mountport\0"
+ /* 12 */ "mounthost\0"
+ /* 13 */ "mountprog\0"
+ /* 14 */ "mountvers\0"
+ /* 15 */ "nfsprog\0"
+ /* 16 */ "nfsvers\0"
+ /* 17 */ "vers\0"
+ /* 18 */ "proto\0"
+ /* 19 */ "namlen\0"
+ /* 20 */ "addr\0";
+ int val = xatoi_u(opteq + 1);
+ *opteq = '\0';
+ switch (index_in_strings(options, opt)) {
+ case 0: // "rsize"
+ data.rsize = val;
+ break;
+ case 1: // "wsize"
+ data.wsize = val;
+ break;
+ case 2: // "timeo"
+ data.timeo = val;
+ break;
+ case 3: // "retrans"
+ data.retrans = val;
+ break;
+ case 4: // "acregmin"
+ data.acregmin = val;
+ break;
+ case 5: // "acregmax"
+ data.acregmax = val;
+ break;
+ case 6: // "acdirmin"
+ data.acdirmin = val;
+ break;
+ case 7: // "acdirmax"
+ data.acdirmax = val;
+ break;
+ case 8: // "actimeo"
+ data.acregmin = val;
+ data.acregmax = val;
+ data.acdirmin = val;
+ data.acdirmax = val;
+ break;
+ case 9: // "retry"
+ retry = val;
+ break;
+ case 10: // "port"
+ port = val;
+ break;
+ case 11: // "mountport"
+ mountport = val;
+ break;
+ case 12: // "mounthost"
+ mounthost = xstrndup(opteq+1,
+ strcspn(opteq+1," \t\n\r,"));
+ break;
+ case 13: // "mountprog"
+ mountprog = val;
+ break;
+ case 14: // "mountvers"
+ mountvers = val;
+ break;
+ case 15: // "nfsprog"
+ nfsprog = val;
+ break;
+ case 16: // "nfsvers"
+ case 17: // "vers"
+ nfsvers = val;
+ break;
+ case 18: // "proto"
+ if (!strncmp(opteq+1, "tcp", 3))
+ tcp = 1;
+ else if (!strncmp(opteq+1, "udp", 3))
+ tcp = 0;
+ else
+ bb_error_msg("warning: unrecognized proto= option");
+ break;
+ case 19: // "namlen"
+ if (nfs_mount_version >= 2)
+ data.namlen = val;
+ else
+ bb_error_msg("warning: option namlen is not supported\n");
+ break;
+ case 20: // "addr" - ignore
+ break;
+ default:
+ bb_error_msg("unknown nfs mount parameter: %s=%d", opt, val);
+ goto fail;
+ }
+ }
+ else {
+ static const char options[] ALIGN1 =
+ "bg\0"
+ "fg\0"
+ "soft\0"
+ "hard\0"
+ "intr\0"
+ "posix\0"
+ "cto\0"
+ "ac\0"
+ "tcp\0"
+ "udp\0"
+ "lock\0";
+ int val = 1;
+ if (!strncmp(opt, "no", 2)) {
+ val = 0;
+ opt += 2;
+ }
+ switch (index_in_strings(options, opt)) {
+ case 0: // "bg"
+#if BB_MMU
+ bg = val;
+#endif
+ break;
+ case 1: // "fg"
+#if BB_MMU
+ bg = !val;
+#endif
+ break;
+ case 2: // "soft"
+ soft = val;
+ break;
+ case 3: // "hard"
+ soft = !val;
+ break;
+ case 4: // "intr"
+ intr = val;
+ break;
+ case 5: // "posix"
+ posix = val;
+ break;
+ case 6: // "cto"
+ nocto = !val;
+ break;
+ case 7: // "ac"
+ noac = !val;
+ break;
+ case 8: // "tcp"
+ tcp = val;
+ break;
+ case 9: // "udp"
+ tcp = !val;
+ break;
+ case 10: // "lock"
+ if (nfs_mount_version >= 3)
+ nolock = !val;
+ else
+ bb_error_msg("warning: option nolock is not supported");
+ break;
+ default:
+ bb_error_msg("unknown nfs mount option: %s%s", val ? "" : "no", opt);
+ goto fail;
+ }
+ }
+ }
+ proto = (tcp) ? IPPROTO_TCP : IPPROTO_UDP;
+
+ data.flags = (soft ? NFS_MOUNT_SOFT : 0)
+ | (intr ? NFS_MOUNT_INTR : 0)
+ | (posix ? NFS_MOUNT_POSIX : 0)
+ | (nocto ? NFS_MOUNT_NOCTO : 0)
+ | (noac ? NFS_MOUNT_NOAC : 0);
+ if (nfs_mount_version >= 2)
+ data.flags |= (tcp ? NFS_MOUNT_TCP : 0);
+ if (nfs_mount_version >= 3)
+ data.flags |= (nolock ? NFS_MOUNT_NONLM : 0);
+ if (nfsvers > MAX_NFSPROT || mountvers > MAX_NFSPROT) {
+ bb_error_msg("NFSv%d not supported", nfsvers);
+ goto fail;
+ }
+ if (nfsvers && !mountvers)
+ mountvers = (nfsvers < 3) ? 1 : nfsvers;
+ if (nfsvers && nfsvers < mountvers) {
+ mountvers = nfsvers;
+ }
+
+ /* Adjust options if none specified */
+ if (!data.timeo)
+ data.timeo = tcp ? 70 : 7;
+
+ data.version = nfs_mount_version;
+
+ if (vfsflags & MS_REMOUNT)
+ goto do_mount;
+
+ /*
+ * If the previous mount operation on the same host was
+ * backgrounded, and the "bg" for this mount is also set,
+ * give up immediately, to avoid the initial timeout.
+ */
+ if (bg && we_saw_this_host_before(hostname)) {
+ daemonized = daemonize();
+ if (daemonized <= 0) { /* parent or error */
+ retval = -daemonized;
+ goto ret;
+ }
+ }
+
+ /* create mount daemon client */
+ /* See if the nfs host = mount host. */
+ if (mounthost) {
+ if (mounthost[0] >= '0' && mounthost[0] <= '9') {
+ mount_server_addr.sin_family = AF_INET;
+ mount_server_addr.sin_addr.s_addr = inet_addr(hostname);
+ } else {
+ hp = gethostbyname(mounthost);
+ if (hp == NULL) {
+ bb_herror_msg("%s", mounthost);
+ goto fail;
+ } else {
+ if (hp->h_length > sizeof(struct in_addr)) {
+ bb_error_msg("got bad hp->h_length?");
+ hp->h_length = sizeof(struct in_addr);
+ }
+ mount_server_addr.sin_family = AF_INET;
+ memcpy(&mount_server_addr.sin_addr,
+ hp->h_addr, hp->h_length);
+ }
+ }
+ }
+
+ /*
+ * The following loop implements the mount retries. When the mount
+ * times out, and the "bg" option is set, we background ourself
+ * and continue trying.
+ *
+ * The case where the mount point is not present and the "bg"
+ * option is set, is treated as a timeout. This is done to
+ * support nested mounts.
+ *
+ * The "retry" count specified by the user is the number of
+ * minutes to retry before giving up.
+ */
+ {
+ struct timeval total_timeout;
+ struct timeval retry_timeout;
+ struct pmap pm_mnt;
+ time_t t;
+ time_t prevt;
+ time_t timeout;
+
+ retry_timeout.tv_sec = 3;
+ retry_timeout.tv_usec = 0;
+ total_timeout.tv_sec = 20;
+ total_timeout.tv_usec = 0;
+ timeout = time(NULL) + 60 * retry;
+ prevt = 0;
+ t = 30;
+retry:
+ /* be careful not to use too many CPU cycles */
+ if (t - prevt < 30)
+ sleep(30);
+
+ get_mountport(&pm_mnt, &mount_server_addr,
+ mountprog,
+ mountvers,
+ proto,
+ mountport);
+ nfsvers = (pm_mnt.pm_vers < 2) ? 2 : pm_mnt.pm_vers;
+
+ /* contact the mount daemon via TCP */
+ mount_server_addr.sin_port = htons(pm_mnt.pm_port);
+ msock = RPC_ANYSOCK;
+
+ switch (pm_mnt.pm_prot) {
+ case IPPROTO_UDP:
+ mclient = clntudp_create(&mount_server_addr,
+ pm_mnt.pm_prog,
+ pm_mnt.pm_vers,
+ retry_timeout,
+ &msock);
+ if (mclient)
+ break;
+ mount_server_addr.sin_port = htons(pm_mnt.pm_port);
+ msock = RPC_ANYSOCK;
+ case IPPROTO_TCP:
+ mclient = clnttcp_create(&mount_server_addr,
+ pm_mnt.pm_prog,
+ pm_mnt.pm_vers,
+ &msock, 0, 0);
+ break;
+ default:
+ mclient = NULL;
+ }
+ if (!mclient) {
+ if (!daemonized && prevt == 0)
+ error_msg_rpc(clnt_spcreateerror(" "));
+ } else {
+ enum clnt_stat clnt_stat;
+ /* try to mount hostname:pathname */
+ mclient->cl_auth = authunix_create_default();
+
+ /* make pointers in xdr_mountres3 NULL so
+ * that xdr_array allocates memory for us
+ */
+ memset(&status, 0, sizeof(status));
+
+ if (pm_mnt.pm_vers == 3)
+ clnt_stat = clnt_call(mclient, MOUNTPROC3_MNT,
+ (xdrproc_t) xdr_dirpath,
+ (caddr_t) &pathname,
+ (xdrproc_t) xdr_mountres3,
+ (caddr_t) &status,
+ total_timeout);
+ else
+ clnt_stat = clnt_call(mclient, MOUNTPROC_MNT,
+ (xdrproc_t) xdr_dirpath,
+ (caddr_t) &pathname,
+ (xdrproc_t) xdr_fhstatus,
+ (caddr_t) &status,
+ total_timeout);
+
+ if (clnt_stat == RPC_SUCCESS)
+ goto prepare_kernel_data; /* we're done */
+ if (errno != ECONNREFUSED) {
+ error_msg_rpc(clnt_sperror(mclient, " "));
+ goto fail; /* don't retry */
+ }
+ /* Connection refused */
+ if (!daemonized && prevt == 0) /* print just once */
+ error_msg_rpc(clnt_sperror(mclient, " "));
+ auth_destroy(mclient->cl_auth);
+ clnt_destroy(mclient);
+ mclient = NULL;
+ close(msock);
+ msock = -1;
+ }
+
+ /* Timeout. We are going to retry... maybe */
+
+ if (!bg)
+ goto fail;
+ if (!daemonized) {
+ daemonized = daemonize();
+ if (daemonized <= 0) { /* parent or error */
+ retval = -daemonized;
+ goto ret;
+ }
+ }
+ prevt = t;
+ t = time(NULL);
+ if (t >= timeout)
+ /* TODO error message */
+ goto fail;
+
+ goto retry;
+ }
+
+prepare_kernel_data:
+
+ if (nfsvers == 2) {
+ if (status.nfsv2.fhs_status != 0) {
+ bb_error_msg("%s:%s failed, reason given by server: %s",
+ hostname, pathname,
+ nfs_strerror(status.nfsv2.fhs_status));
+ goto fail;
+ }
+ memcpy(data.root.data,
+ (char *) status.nfsv2.fhstatus_u.fhs_fhandle,
+ NFS_FHSIZE);
+ data.root.size = NFS_FHSIZE;
+ memcpy(data.old_root.data,
+ (char *) status.nfsv2.fhstatus_u.fhs_fhandle,
+ NFS_FHSIZE);
+ } else {
+ fhandle3 *my_fhandle;
+ if (status.nfsv3.fhs_status != 0) {
+ bb_error_msg("%s:%s failed, reason given by server: %s",
+ hostname, pathname,
+ nfs_strerror(status.nfsv3.fhs_status));
+ goto fail;
+ }
+ my_fhandle = &status.nfsv3.mountres3_u.mountinfo.fhandle;
+ memset(data.old_root.data, 0, NFS_FHSIZE);
+ memset(&data.root, 0, sizeof(data.root));
+ data.root.size = my_fhandle->fhandle3_len;
+ memcpy(data.root.data,
+ (char *) my_fhandle->fhandle3_val,
+ my_fhandle->fhandle3_len);
+
+ data.flags |= NFS_MOUNT_VER3;
+ }
+
+ /* create nfs socket for kernel */
+
+ if (tcp) {
+ if (nfs_mount_version < 3) {
+ bb_error_msg("NFS over TCP is not supported");
+ goto fail;
+ }
+ fsock = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
+ } else
+ fsock = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
+ if (fsock < 0) {
+ bb_perror_msg("nfs socket");
+ goto fail;
+ }
+ if (bindresvport(fsock, 0) < 0) {
+ bb_perror_msg("nfs bindresvport");
+ goto fail;
+ }
+ if (port == 0) {
+ server_addr.sin_port = PMAPPORT;
+ port = pmap_getport(&server_addr, nfsprog, nfsvers,
+ tcp ? IPPROTO_TCP : IPPROTO_UDP);
+ if (port == 0)
+ port = NFS_PORT;
+ }
+ server_addr.sin_port = htons(port);
+
+ /* prepare data structure for kernel */
+
+ data.fd = fsock;
+ memcpy((char *) &data.addr, (char *) &server_addr, sizeof(data.addr));
+ strncpy(data.hostname, hostname, sizeof(data.hostname));
+
+ /* clean up */
+
+ auth_destroy(mclient->cl_auth);
+ clnt_destroy(mclient);
+ close(msock);
+ msock = -1;
+
+ if (bg) {
+ /* We must wait until mount directory is available */
+ struct stat statbuf;
+ int delay = 1;
+ while (stat(mp->mnt_dir, &statbuf) == -1) {
+ if (!daemonized) {
+ daemonized = daemonize();
+ if (daemonized <= 0) { /* parent or error */
+ // FIXME: parent doesn't close fsock - ??!
+ retval = -daemonized;
+ goto ret;
+ }
+ }
+ sleep(delay); /* 1, 2, 4, 8, 16, 30, ... */
+ delay *= 2;
+ if (delay > 30)
+ delay = 30;
+ }
+ }
+
+do_mount: /* perform actual mount */
+
+ mp->mnt_type = (char*)"nfs";
+ retval = mount_it_now(mp, vfsflags, (char*)&data);
+ goto ret;
+
+fail: /* abort */
+
+ if (msock >= 0) {
+ if (mclient) {
+ auth_destroy(mclient->cl_auth);
+ clnt_destroy(mclient);
+ }
+ close(msock);
+ }
+ if (fsock >= 0)
+ close(fsock);
+
+ret:
+ free(hostname);
+ free(mounthost);
+ free(filteropts);
+ return retval;
+}
+
+#else /* !ENABLE_FEATURE_MOUNT_NFS */
+
+/* Never called. Call should be optimized out. */
+int nfsmount(struct mntent *mp, int vfsflags, char *filteropts);
+
+#endif /* !ENABLE_FEATURE_MOUNT_NFS */
+
+// Mount one directory. Handles CIFS, NFS, loopback, autobind, and filesystem
+// type detection. Returns 0 for success, nonzero for failure.
+// NB: mp->xxx fields may be trashed on exit
+static int singlemount(struct mntent *mp, int ignore_busy)
+{
+ int rc = -1, vfsflags;
char *loopFile = 0, *filteropts = 0;
llist_t *fl = 0;
struct stat st;
// Treat fstype "auto" as unspecified.
- if (mp->mnt_type && !strcmp(mp->mnt_type,"auto")) mp->mnt_type = 0;
+ if (mp->mnt_type && strcmp(mp->mnt_type,"auto") == 0)
+ mp->mnt_type = 0;
+
+ // Might this be a virtual filesystem?
+
+ if (ENABLE_FEATURE_MOUNT_HELPERS
+ && (strchr(mp->mnt_fsname,'#'))
+ ) {
+ char *s, *p, *args[35];
+ int n = 0;
+ for (s = p = mp->mnt_fsname; *s && n < 35-3; ++s) {
+ if (s[0] == '#' && s[1] != '#') {
+ *s = '\0';
+ args[n++] = p;
+ p = s + 1;
+ }
+ }
+ args[n++] = p;
+ args[n++] = mp->mnt_dir;
+ args[n] = NULL;
+ rc = wait4pid(xspawn(args));
+ goto report_error;
+ }
+
+ // Might this be an CIFS filesystem?
- // Might this be an NFS filesystem?
+ if (ENABLE_FEATURE_MOUNT_CIFS
+ && (!mp->mnt_type || strcmp(mp->mnt_type,"cifs") == 0)
+ && (mp->mnt_fsname[0]=='/' || mp->mnt_fsname[0]=='\\')
+ && mp->mnt_fsname[0]==mp->mnt_fsname[1]
+ ) {
+ len_and_sockaddr *lsa;
+ char *ip, *dotted;
+ char *s;
- if (ENABLE_FEATURE_MOUNT_NFS &&
- (!mp->mnt_type || !strcmp(mp->mnt_type,"nfs")) &&
- strchr(mp->mnt_fsname, ':') != NULL)
- {
- if (nfsmount(mp->mnt_fsname, mp->mnt_dir, &vfsflags, &filteropts, 1)) {
- bb_perror_msg("nfsmount failed");
- return 1;
- } else {
- // Strangely enough, nfsmount() doesn't actually mount() anything.
- mp->mnt_type = "nfs";
- rc = mount_it_now(mp, vfsflags, filteropts);
- if (ENABLE_FEATURE_CLEAN_UP) free(filteropts);
-
- return rc;
+ rc = 1;
+ // Replace '/' with '\' and verify that unc points to "//server/share".
+
+ for (s = mp->mnt_fsname; *s; ++s)
+ if (*s == '/') *s = '\\';
+
+ // get server IP
+
+ s = strrchr(mp->mnt_fsname, '\\');
+ if (s <= mp->mnt_fsname+1) goto report_error;
+ *s = '\0';
+ lsa = host2sockaddr(mp->mnt_fsname+2, 0);
+ *s = '\\';
+ if (!lsa) goto report_error;
+
+ // insert ip=... option into string flags.
+
+ dotted = xmalloc_sockaddr2dotted_noport(&lsa->sa);
+ ip = xasprintf("ip=%s", dotted);
+ parse_mount_options(ip, &filteropts);
+
+ // compose new unc '\\server-ip\share'
+ // (s => slash after hostname)
+
+ mp->mnt_fsname = xasprintf("\\\\%s%s", dotted, s);
+
+ // lock is required
+ vfsflags |= MS_MANDLOCK;
+
+ mp->mnt_type = (char*)"cifs";
+ rc = mount_it_now(mp, vfsflags, filteropts);
+ if (ENABLE_FEATURE_CLEAN_UP) {
+ free(mp->mnt_fsname);
+ free(ip);
+ free(dotted);
+ free(lsa);
}
+ goto report_error;
+ }
+
+ // Might this be an NFS filesystem?
+
+ if (ENABLE_FEATURE_MOUNT_NFS
+ && (!mp->mnt_type || !strcmp(mp->mnt_type, "nfs"))
+ && strchr(mp->mnt_fsname, ':') != NULL
+ ) {
+ rc = nfsmount(mp, vfsflags, filteropts);
+ goto report_error;
}
// Look at the file. (Not found isn't a failure for remount, or for
// a synthetic filesystem like proc or sysfs.)
+ // (We use stat, not lstat, in order to allow
+ // mount symlink_to_file_or_blkdev dir)
- if (lstat(mp->mnt_fsname, &st));
- else if (!(vfsflags & (MS_REMOUNT | MS_BIND | MS_MOVE))) {
+ if (!stat(mp->mnt_fsname, &st)
+ && !(vfsflags & (MS_REMOUNT | MS_BIND | MS_MOVE))
+ ) {
// Do we need to allocate a loopback device for it?
if (ENABLE_FEATURE_MOUNT_LOOP && S_ISREG(st.st_mode)) {
loopFile = bb_simplify_path(mp->mnt_fsname);
- mp->mnt_fsname = 0;
- switch(set_loop(&(mp->mnt_fsname), loopFile, 0)) {
- case 0:
- case 1:
- break;
- default:
- bb_error_msg( errno == EPERM || errno == EACCES
- ? bb_msg_perm_denied_are_you_root
- : "Couldn't setup loop device");
- return errno;
+ mp->mnt_fsname = NULL; /* will receive malloced loop dev name */
+ if (set_loop(&(mp->mnt_fsname), loopFile, 0) < 0) {
+ if (errno == EPERM || errno == EACCES)
+ bb_error_msg(bb_msg_perm_denied_are_you_root);
+ else
+ bb_perror_msg("cannot setup loop device");
+ return errno;
}
// Autodetect bind mounts
- } else if (S_ISDIR(st.st_mode) && !mp->mnt_type) vfsflags |= MS_BIND;
+ } else if (S_ISDIR(st.st_mode) && !mp->mnt_type)
+ vfsflags |= MS_BIND;
}
/* If we know the fstype (or don't need to), jump straight
if (mp->mnt_type || (vfsflags & (MS_REMOUNT | MS_BIND | MS_MOVE)))
rc = mount_it_now(mp, vfsflags, filteropts);
-
- // Loop through filesystem types until mount succeeds or we run out
-
else {
+ // Loop through filesystem types until mount succeeds
+ // or we run out
/* Initialize list of block backed filesystems. This has to be
* done here so that during "mount -a", mounts after /proc shows up
for (fl = fslist; fl; fl = fl->link) {
mp->mnt_type = fl->data;
-
- if (!(rc = mount_it_now(mp,vfsflags, filteropts))) break;
-
- mp->mnt_type = 0;
+ rc = mount_it_now(mp, vfsflags, filteropts);
+ if (!rc) break;
}
}
- if (ENABLE_FEATURE_CLEAN_UP) free(filteropts);
-
// If mount failed, clean up loop file (if any).
if (ENABLE_FEATURE_MOUNT_LOOP && rc && loopFile) {
free(mp->mnt_fsname);
}
}
+
+ report_error:
+ if (ENABLE_FEATURE_CLEAN_UP)
+ free(filteropts);
+
+ if (errno == EBUSY && ignore_busy)
+ return 0;
+ if (rc < 0)
+ bb_perror_msg("mounting %s on %s failed", mp->mnt_fsname, mp->mnt_dir);
return rc;
}
-
// Parse options, if necessary parse fstab/mtab, and call singlemount for
// each directory to be mounted.
+static const char must_be_root[] ALIGN1 = "you must be root";
+
+int mount_main(int argc, char **argv);
int mount_main(int argc, char **argv)
{
- char *cmdopts = bb_xstrdup(""), *fstabname, *fstype=0, *storage_path=0;
+ enum { OPT_ALL = 0x10 };
+
+ char *cmdopts = xstrdup(""), *fstype=0, *storage_path=0;
+ char *opt_o;
+ const char *fstabname;
FILE *fstab;
- int i, opt, all = FALSE, rc = 1;
+ int i, j, rc = 0;
+ unsigned opt;
struct mntent mtpair[2], *mtcur = mtpair;
+ SKIP_DESKTOP(const int nonroot = 0;)
+ USE_DESKTOP( int nonroot = (getuid() != 0);)
/* parse long options, like --bind and --move. Note that -o option
* and --option are synonymous. Yes, this means --remount,rw works. */
- for (i = opt = 0; i < argc; i++) {
+ for (i = j = 0; i < argc; i++) {
if (argv[i][0] == '-' && argv[i][1] == '-') {
- append_mount_options(&cmdopts,argv[i]+2);
- } else argv[opt++] = argv[i];
+ append_mount_options(&cmdopts, argv[i]+2);
+ } else argv[j++] = argv[i];
}
- argc = opt;
+ argv[j] = 0;
+ argc = j;
// Parse remaining options
- while ((opt = getopt(argc, argv, "o:t:rwavnf")) > 0) {
- switch (opt) {
- case 'o':
- append_mount_options(&cmdopts, optarg);
- break;
- case 't':
- fstype = optarg;
- break;
- case 'r':
- append_mount_options(&cmdopts, "ro");
- break;
- case 'w':
- append_mount_options(&cmdopts, "rw");
- break;
- case 'a':
- all = TRUE;
- break;
- case 'n':
- USE_FEATURE_MTAB_SUPPORT(useMtab = FALSE;)
- break;
- case 'f':
- USE_FEATURE_MTAB_SUPPORT(fakeIt = FALSE;)
- break;
- case 'v':
- break; // ignore -v
- default:
- bb_show_usage();
- }
- }
+ opt = getopt32(argv, "o:t:rwanfvsi", &opt_o, &fstype);
+ if (opt & 0x1) append_mount_options(&cmdopts, opt_o); // -o
+ //if (opt & 0x2) // -t
+ if (opt & 0x4) append_mount_options(&cmdopts, "ro"); // -r
+ if (opt & 0x8) append_mount_options(&cmdopts, "rw"); // -w
+ //if (opt & 0x10) // -a
+ if (opt & 0x20) USE_FEATURE_MTAB_SUPPORT(useMtab = 0); // -n
+ if (opt & 0x40) USE_FEATURE_MTAB_SUPPORT(fakeIt = 1); // -f
+ //if (opt & 0x80) // -v: verbose (ignore)
+ //if (opt & 0x100) // -s: sloppy (ignore)
+ //if (opt & 0x200) // -i: don't call mount.<fstype> (ignore)
+ argv += optind;
+ argc -= optind;
// Three or more non-option arguments? Die with a usage message.
- if (optind-argc>2) bb_show_usage();
+ if (argc > 2) bb_show_usage();
// If we have no arguments, show currently mounted filesystems
- if (optind == argc) {
- if (!all) {
+ if (!argc) {
+ if (!(opt & OPT_ALL)) {
FILE *mountTable = setmntent(bb_path_mtab_file, "r");
- if(!mountTable) bb_error_msg_and_die("No %s",bb_path_mtab_file);
+ if (!mountTable) bb_error_msg_and_die("no %s", bb_path_mtab_file);
- while (getmntent_r(mountTable,mtpair,bb_common_bufsiz1,
- sizeof(bb_common_bufsiz1)))
+ while (getmntent_r(mountTable, &mtpair[0], getmntent_buf,
+ sizeof(getmntent_buf)))
{
- // Don't show rootfs.
- if (!strcmp(mtpair->mnt_fsname, "rootfs")) continue;
+ // Don't show rootfs. FIXME: why??
+ // util-linux 2.12a happily shows rootfs...
+ //if (!strcmp(mtpair->mnt_fsname, "rootfs")) continue;
if (!fstype || !strcmp(mtpair->mnt_type, fstype))
printf("%s on %s type %s (%s)\n", mtpair->mnt_fsname,
if (ENABLE_FEATURE_CLEAN_UP) endmntent(mountTable);
return EXIT_SUCCESS;
}
- }
+ } else storage_path = bb_simplify_path(argv[0]);
// When we have two arguments, the second is the directory and we can
// skip looking at fstab entirely. We can always abspath() the directory
// argument when we get it.
- if (optind+2 == argc) {
- mtpair->mnt_fsname = argv[optind];
- mtpair->mnt_dir = argv[optind+1];
+ if (argc == 2) {
+ if (nonroot)
+ bb_error_msg_and_die(must_be_root);
+ mtpair->mnt_fsname = argv[0];
+ mtpair->mnt_dir = argv[1];
mtpair->mnt_type = fstype;
mtpair->mnt_opts = cmdopts;
- rc = singlemount(mtpair);
+ rc = singlemount(mtpair, 0);
goto clean_up;
}
- // If we have at least one argument, it's the storage location
+ i = parse_mount_options(cmdopts, 0);
+ if (nonroot && (i & ~MS_SILENT)) // Non-root users cannot specify flags
+ bb_error_msg_and_die(must_be_root);
- if (optind < argc) storage_path = bb_simplify_path(argv[optind]);
+ // If we have a shared subtree flag, don't worry about fstab or mtab.
- // Open either fstab or mtab
+ if (ENABLE_FEATURE_MOUNT_FLAGS
+ && (i & (MS_SHARED | MS_PRIVATE | MS_SLAVE | MS_UNBINDABLE))
+ ) {
+ rc = mount("", argv[0], "", i, "");
+ if (rc) bb_simple_perror_msg_and_die(argv[0]);
+ goto clean_up;
+ }
- if (parse_mount_options(cmdopts,0) & MS_REMOUNT)
- fstabname = (char *)bb_path_mtab_file; // Again with the evil const.
- else fstabname="/etc/fstab";
+ // Open either fstab or mtab
- if (!(fstab=setmntent(fstabname,"r")))
- bb_perror_msg_and_die("Cannot read %s",fstabname);
+ fstabname = "/etc/fstab";
+ if (i & MS_REMOUNT) {
+ fstabname = bb_path_mtab_file;
+ }
+ fstab = setmntent(fstabname, "r");
+ if (!fstab)
+ bb_perror_msg_and_die("cannot read %s", fstabname);
// Loop through entries until we find what we're looking for.
- memset(mtpair,0,sizeof(mtpair));
+ memset(mtpair, 0, sizeof(mtpair));
for (;;) {
- struct mntent *mtnext = mtpair + (mtcur==mtpair ? 1 : 0);
+ struct mntent *mtnext = (mtcur==mtpair ? mtpair+1 : mtpair);
// Get next fstab entry
- if (!getmntent_r(fstab, mtcur, bb_common_bufsiz1
- + (mtcur==mtpair ? sizeof(bb_common_bufsiz1)/2 : 0),
- sizeof(bb_common_bufsiz1)/2))
+ if (!getmntent_r(fstab, mtcur, getmntent_buf
+ + (mtcur==mtpair ? sizeof(getmntent_buf)/2 : 0),
+ sizeof(getmntent_buf)/2))
{
// Were we looking for something specific?
- if (optind != argc) {
+ if (argc) {
// If we didn't find anything, complain.
if (!mtnext->mnt_fsname)
- bb_error_msg_and_die("Can't find %s in %s",
- argv[optind], fstabname);
+ bb_error_msg_and_die("can't find %s in %s",
+ argv[0], fstabname);
+
+ mtcur = mtnext;
+ if (nonroot) {
+ // fstab must have "users" or "user"
+ if (!(parse_mount_options(mtcur->mnt_opts, 0) & MOUNT_USERS))
+ bb_error_msg_and_die(must_be_root);
+ }
// Mount the last thing we found.
- mtcur = mtnext;
- mtcur->mnt_opts=bb_xstrdup(mtcur->mnt_opts);
- append_mount_options(&(mtcur->mnt_opts),cmdopts);
- rc = singlemount(mtcur);
+ mtcur->mnt_opts = xstrdup(mtcur->mnt_opts);
+ append_mount_options(&(mtcur->mnt_opts), cmdopts);
+ rc = singlemount(mtcur, 0);
free(mtcur->mnt_opts);
}
- break;
+ goto clean_up;
}
/* If we're trying to mount something specific and this isn't it,
* skip it. Note we must match both the exact text in fstab (ala
* "proc") or a full path from root */
- if (optind != argc) {
+ if (argc) {
// Is this what we're looking for?
- if(strcmp(argv[optind],mtcur->mnt_fsname) &&
- strcmp(storage_path,mtcur->mnt_fsname) &&
- strcmp(argv[optind],mtcur->mnt_dir) &&
- strcmp(storage_path,mtcur->mnt_dir)) continue;
+ if (strcmp(argv[0], mtcur->mnt_fsname) &&
+ strcmp(storage_path, mtcur->mnt_fsname) &&
+ strcmp(argv[0], mtcur->mnt_dir) &&
+ strcmp(storage_path, mtcur->mnt_dir)) continue;
// Remember this entry. Something later may have overmounted
// it, and we want the _last_ match.
// If we're mounting all.
} else {
-
// Do we need to match a filesystem type?
- if (fstype && strcmp(mtcur->mnt_type,fstype)) continue;
+ if (fstype && match_fstype(mtcur, fstype)) continue;
// Skip noauto and swap anyway.
- if (parse_mount_options(mtcur->mnt_opts,0)
+ if (parse_mount_options(mtcur->mnt_opts, 0)
& (MOUNT_NOAUTO | MOUNT_SWAP)) continue;
+ // No, mount -a won't mount anything,
+ // even user mounts, for mere humans.
+
+ if (nonroot)
+ bb_error_msg_and_die(must_be_root);
+
// Mount this thing.
- rc = singlemount(mtcur);
- if(rc) {
- // Don't whine about already mounted fs when mounting all.
- // Note: we should probably change return value to indicate
- // failure, without causing a duplicate error message.
- if (errno != EBUSY) bb_perror_msg("Mounting %s on %s failed",
- mtcur->mnt_fsname, mtcur->mnt_dir);
- rc = 0;
+ // NFS mounts want this to be xrealloc-able
+ mtcur->mnt_opts = xstrdup(mtcur->mnt_opts);
+ if (singlemount(mtcur, 1)) {
+ /* Count number of failed mounts */
+ rc++;
}
+ free(mtcur->mnt_opts);
}
}
if (ENABLE_FEATURE_CLEAN_UP) endmntent(fstab);
free(cmdopts);
}
- if(rc)
- bb_perror_msg("Mounting %s on %s failed",
- mtcur->mnt_fsname, mtcur->mnt_dir);
-
return rc;
}
projects / oweals / busybox.git / blobdiff