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print proper error messages from NFS, null terminate arg list
[unix-history] / usr / src / sbin / mount / mount.c
/*
* Copyright (c) 1980, 1989 The Regents of the University of California.
* All rights reserved.
*
* Redistribution and use in source and binary forms are permitted
* provided that the above copyright notice and this paragraph are
* duplicated in all such forms and that any documentation,
* advertising materials, and other materials related to such
* distribution and use acknowledge that the software was developed
* by the University of California, Berkeley. The name of the
* University may not be used to endorse or promote products derived
* from this software without specific prior written permission.
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*/
#ifndef lint
char copyright[] =
"@(#) Copyright (c) 1980, 1989 The Regents of the University of California.\n\
All rights reserved.\n";
#endif /* not lint */
#ifndef lint
static char sccsid[] = "@(#)mount.c 5.19 (Berkeley) %G%";
#endif /* not lint */
#include "pathnames.h"
#include <sys/param.h>
#include <sys/file.h>
#include <sys/time.h>
#include <sys/wait.h>
#include <fstab.h>
#include <errno.h>
#include <stdio.h>
#include <strings.h>
#include <sys/dir.h>
#include <sys/uio.h>
#include <sys/namei.h>
#include <sys/mount.h>
#ifdef NFS
#include <sys/socket.h>
#include <sys/socketvar.h>
#include <netdb.h>
#include <rpc/rpc.h>
#include <rpc/pmap_clnt.h>
#include <rpc/pmap_prot.h>
#include <nfs/rpcv2.h>
#include <nfs/nfsv2.h>
#include <nfs/nfs.h>
#endif
#define BADTYPE(type) \
(strcmp(type, FSTAB_RO) && strcmp(type, FSTAB_RW) && \
strcmp(type, FSTAB_RQ))
#define SETTYPE(type) \
(!strcmp(type, FSTAB_RW) || !strcmp(type, FSTAB_RQ))
int fake, verbose, updateflg, mnttype;
char *mntname, **envp;
#ifdef NFS
int xdr_dir(), xdr_fh();
char *getnfsargs();
struct nfs_args nfsargs = {
(struct sockaddr_in *)0,
(nfsv2fh_t *)0,
0,
NFS_WSIZE,
NFS_RSIZE,
NFS_TIMEO,
NFS_RETRANS,
(char *)0,
};
struct nfhret {
u_long stat;
nfsv2fh_t nfh;
};
int retrycnt = 10000;
#define BGRND 1
#define ISBGRND 2
int opflags = 0;
#endif
main(argc, argv, arge)
int argc;
char **argv;
char **arge;
{
extern char *optarg;
extern int optind;
register struct fstab *fs;
register int cnt;
int all, ch, rval, flags, i;
long mntsize;
struct statfs *mntbuf, *getmntpt();
char *type, *options = NULL;
envp = arge;
all = 0;
type = NULL;
mnttype = MOUNT_UFS;
mntname = "ufs";
while ((ch = getopt(argc, argv, "afrwuvt:o:")) != EOF)
switch((char)ch) {
case 'a':
all = 1;
break;
case 'f':
fake = 1;
break;
case 'r':
type = FSTAB_RO;
break;
case 'u':
updateflg = M_UPDATE;
break;
case 'v':
verbose = 1;
break;
case 'w':
type = FSTAB_RW;
break;
case 'o':
options = optarg;
break;
case 't':
mnttype = getmnttype(optarg);
break;
case '?':
default:
usage();
/* NOTREACHED */
}
argc -= optind;
argv += optind;
/* NOSTRICT */
if (all) {
rval = 0;
while (fs = getfsent()) {
if (BADTYPE(fs->fs_type))
continue;
/* `/' is special, it's always mounted */
if (!strcmp(fs->fs_file, "/"))
flags = M_UPDATE;
else
flags = updateflg;
mnttype = getmnttype(fs->fs_vfstype);
rval |= mountfs(fs->fs_spec, fs->fs_file, flags,
type, options, fs->fs_mntops);
}
exit(rval);
}
if (argc == 0) {
if (verbose || fake || type)
usage();
if ((mntsize = getmntinfo(&mntbuf)) == 0) {
fprintf(stderr,
"mount: cannot get mount information\n");
exit(1);
}
for (i = 0; i < mntsize; i++)
prmount(mntbuf[i].f_mntfromname, mntbuf[i].f_mntonname,
mntbuf[i].f_flags);
exit(0);
}
if (argc == 1 && updateflg) {
if ((mntbuf = getmntpt(*argv)) == NULL) {
fprintf(stderr,
"mount: unknown special file or file system %s.\n",
*argv);
exit(1);
}
mnttype = mntbuf->f_type;
exit(mountfs(mntbuf->f_mntfromname, mntbuf->f_mntonname,
updateflg, type, options, NULL));
}
if (argc == 1) {
if (!(fs = getfsfile(*argv)) && !(fs = getfsspec(*argv))) {
fprintf(stderr,
"mount: unknown special file or file system %s.\n",
*argv);
exit(1);
}
if (BADTYPE(fs->fs_type)) {
fprintf(stderr,
"mount: %s has unknown file system type.\n", *argv);
exit(1);
}
mnttype = getmnttype(fs->fs_vfstype);
exit(mountfs(fs->fs_spec, fs->fs_file, updateflg,
type, options, fs->fs_mntops));
}
if (argc != 2)
usage();
exit(mountfs(argv[0], argv[1], updateflg, type, options, NULL));
}
mountfs(spec, name, flags, type, options, mntopts)
char *spec, *name, *type, *options, *mntopts;
int flags;
{
extern int errno;
register int cnt;
int argc, status, i;
struct ufs_args args;
char *argp, *argv[50];
char execname[MAXPATHLEN + 1], flagval[12];
if (mntopts)
getstdopts(mntopts, &flags);
if (options)
getstdopts(options, &flags);
if (type)
getstdopts(type, &flags);
switch (mnttype) {
case MOUNT_UFS:
if (mntopts)
getufsopts(mntopts, &flags);
if (options)
getufsopts(options, &flags);
args.fspec = spec;
argp = (caddr_t)&args;
break;
#ifdef NFS
case MOUNT_NFS:
if (mntopts)
getnfsopts(mntopts, &nfsargs, &opflags, &retrycnt);
if (options)
getnfsopts(options, &nfsargs, &opflags, &retrycnt);
if (argp = getnfsargs(spec, name, type))
break;
return (1);
#endif /* NFS */
case MOUNT_MFS:
default:
argv[0] = mntname;
argc = 1;
if (flags) {
argv[argc++] = "-F";
sprintf(flagval, "%d", flags);
argv[argc++] = flagval;
}
if (mntopts)
argc += getexecopts(mntopts, &argv[argc]);
if (options)
argc += getexecopts(options, &argv[argc]);
argv[argc++] = spec;
argv[argc++] = name;
argv[argc++] = NULL;
sprintf(execname, "%s/%s", _PATH_EXECDIR, mntname);
if (verbose) {
printf("exec: %s", execname);
for (i = 1; i < argc; i++)
printf(" %s", argv[i]);
printf("\n");
}
if (fake)
break;
if (i = vfork()) {
if (i == -1) {
perror("mount: vfork starting file system");
return (1);
}
if (waitpid(i, &status, 0) != -1 &&
WIFEXITED(status) &&
WEXITSTATUS(status) != 0)
return (WEXITSTATUS(status));
spec = mntname;
goto out;
}
execve(execname, argv, envp);
perror(execname);
exit (1);
/* NOTREACHED */
}
if (!fake && mount(mnttype, name, flags, argp)) {
if (opflags & ISBGRND)
exit(1);
fprintf(stderr, "%s on %s: ", spec, name);
switch (errno) {
case EMFILE:
fprintf(stderr, "Mount table full\n");
break;
case EINVAL:
if (flags & M_UPDATE)
fprintf(stderr, "Specified device does %s\n",
"not match mounted device");
else
fprintf(stderr, "Bogus super block\n");
break;
case EOPNOTSUPP:
fprintf(stderr, "Operation not supported\n");
break;
default:
perror((char *)NULL);
break;
}
return(1);
}
out:
if (verbose)
prmount(spec, name, flags);
if (opflags & ISBGRND)
exit();
else
return(0);
}
static
prmount(spec, name, flags)
char *spec, *name;
long flags;
{
register char *root;
if (opflags & ISBGRND)
return;
/*
* trim trailing /'s and find last component of name
*/
for (root = index(spec, '\0'); *--root == '/';)
/* void */;
*++root = '\0';
if (root = rindex(spec, '/'))
spec = root + 1;
printf("%s on %s", spec, name);
if (flags & M_RDONLY)
printf(" (read-only)");
if (flags & M_NOEXEC)
printf(" (noexec)");
if (flags & M_NOSUID)
printf(" (nosuid)");
if (flags & M_NODEV)
printf(" (nodev)");
if (flags & M_SYNCHRONOUS)
printf(" (synchronous)");
if (flags & M_UPDATE)
printf(" (update only)");
printf("\n");
}
getmnttype(fstype)
char *fstype;
{
mntname = fstype;
if (!strcmp(fstype, "ufs"))
return (MOUNT_UFS);
if (!strcmp(fstype, "nfs"))
return (MOUNT_NFS);
if (!strcmp(fstype, "mfs"))
return (MOUNT_MFS);
return (0);
}
usage()
{
fprintf(stderr, "usage: mount [-afurw]\nor mount [-furw] special | node\nor mount [-furw] special node\n");
exit(1);
}
getstdopts(options, flagp)
char *options;
long *flagp;
{
register char *opt;
int negative;
char *optbuf[BUFSIZ], *strtok();
strcpy(optbuf, options);
for (opt = strtok(optbuf, ","); opt; opt = strtok(NULL, ",")) {
if (opt[0] == 'n' && opt[1] == 'o') {
negative++;
opt += 2;
} else {
negative = 0;
}
if (!negative && !strcasecmp(opt, FSTAB_RO)) {
*flagp |= M_RDONLY;
continue;
}
if (!negative && !strcasecmp(opt, FSTAB_RW)) {
*flagp &= ~M_RDONLY;
continue;
}
if (!strcasecmp(opt, "exec")) {
if (negative)
*flagp |= M_NOEXEC;
else
*flagp &= ~M_NOEXEC;
continue;
}
if (!strcasecmp(opt, "suid")) {
if (negative)
*flagp |= M_NOSUID;
else
*flagp &= ~M_NOSUID;
continue;
}
if (!strcasecmp(opt, "dev")) {
if (negative)
*flagp |= M_NODEV;
else
*flagp &= ~M_NODEV;
continue;
}
if (!strcasecmp(opt, "synchronous")) {
if (!negative)
*flagp |= M_SYNCHRONOUS;
else
*flagp &= ~M_SYNCHRONOUS;
continue;
}
}
}
getufsopts(options, flagp)
char *options;
long *flagp;
{
return;
}
getexecopts(options, argv)
char *options;
char **argv;
{
register int argc = 0;
register char *opt;
char *strtok();
for (opt = strtok(options, ","); opt; opt = strtok(NULL, ",")) {
if (opt[0] != '-')
continue;
argv[argc++] = opt;
if (opt[2] == '\0' || opt[2] != '=')
continue;
opt[2] = '\0';
argv[argc++] = &opt[3];
}
return (argc);
}
struct statfs *
getmntpt(name)
char *name;
{
long mntsize;
register long i;
struct statfs *mntbuf;
mntsize = getmntinfo(&mntbuf);
for (i = 0; i < mntsize; i++) {
if (!strcmp(mntbuf[i].f_mntfromname, name) ||
!strcmp(mntbuf[i].f_mntonname, name))
return (&mntbuf[i]);
}
return ((struct statfs *)0);
}
#ifdef NFS
/*
* Handle the getoption arg.
* Essentially update "opflags", "retrycnt" and "nfsargs"
*/
getnfsopts(optarg, nfsargsp, opflagsp, retrycntp)
char *optarg;
struct nfs_args *nfsargsp;
int *opflagsp;
int *retrycntp;
{
register char *cp, *nextcp;
int num;
char *nump;
cp = optarg;
while (cp != NULL && *cp != '\0') {
if ((nextcp = index(cp, ',')) != NULL)
*nextcp++ = '\0';
if ((nump = index(cp, '=')) != NULL) {
*nump++ = '\0';
num = atoi(nump);
} else
num = -1;
/*
* Just test for a string match and do it
*/
if (!strcmp(cp, "bg")) {
*opflagsp |= BGRND;
} else if (!strcmp(cp, "soft")) {
nfsargsp->flags |= NFSMNT_SOFT;
} else if (!strcmp(cp, "intr")) {
nfsargsp->flags |= NFSMNT_INT;
} else if (!strcmp(cp, "retry") && num > 0) {
*retrycntp = num;
} else if (!strcmp(cp, "rsize") && num > 0) {
nfsargsp->rsize = num;
nfsargsp->flags |= NFSMNT_RSIZE;
} else if (!strcmp(cp, "wsize") && num > 0) {
nfsargsp->wsize = num;
nfsargsp->flags |= NFSMNT_WSIZE;
} else if (!strcmp(cp, "timeo") && num > 0) {
nfsargsp->timeo = num;
nfsargsp->flags |= NFSMNT_TIMEO;
} else if (!strcmp(cp, "retrans") && num > 0) {
nfsargsp->retrans = num;
nfsargsp->flags |= NFSMNT_RETRANS;
}
cp = nextcp;
}
}
char *
getnfsargs(spec)
char *spec;
{
register CLIENT *clp;
struct hostent *hp;
struct sockaddr_in saddr;
struct timeval pertry, try;
enum clnt_stat clnt_stat;
int so = RPC_ANYSOCK;
char *hostp, *delimp;
u_short tport;
struct nfhret nfhret;
char nam[MNAMELEN + 1];
strncpy(nam, spec, MNAMELEN);
nam[MNAMELEN] = '\0';
if ((delimp = index(spec, '@')) != NULL) {
hostp = delimp + 1;
} else if ((delimp = index(spec, ':')) != NULL) {
hostp = spec;
spec = delimp + 1;
} else {
fprintf(stderr,
"No <host>:<dirpath> or <dirpath>@<host> spec\n");
return (0);
}
*delimp = '\0';
if ((hp = gethostbyname(hostp)) == NULL) {
fprintf(stderr, "Can't get net id for host\n");
return (0);
}
bcopy(hp->h_addr, (caddr_t)&saddr.sin_addr, hp->h_length);
nfhret.stat = EACCES; /* Mark not yet successful */
while (retrycnt > 0) {
saddr.sin_family = AF_INET;
saddr.sin_port = htons(PMAPPORT);
if ((tport = pmap_getport(&saddr, RPCPROG_NFS,
NFS_VER2, IPPROTO_UDP)) == 0) {
if ((opflags & ISBGRND) == 0)
clnt_pcreateerror("NFS Portmap");
} else {
saddr.sin_port = 0;
pertry.tv_sec = 10;
pertry.tv_usec = 0;
if ((clp = clntudp_create(&saddr, RPCPROG_MNT,
RPCMNT_VER1, pertry, &so)) == NULL) {
if ((opflags & ISBGRND) == 0)
clnt_pcreateerror("Cannot MNT PRC");
} else {
clp->cl_auth = authunix_create_default();
try.tv_sec = 10;
try.tv_usec = 0;
clnt_stat = clnt_call(clp, RPCMNT_MOUNT,
xdr_dir, spec, xdr_fh, &nfhret, try);
if (clnt_stat != RPC_SUCCESS) {
if ((opflags & ISBGRND) == 0)
clnt_perror(clp, "Bad MNT RPC");
} else {
auth_destroy(clp->cl_auth);
clnt_destroy(clp);
retrycnt = 0;
}
}
}
if (--retrycnt > 0) {
if (opflags & BGRND) {
opflags &= ~BGRND;
if (fork())
return (0);
else
opflags |= ISBGRND;
}
sleep(10);
}
}
if (nfhret.stat) {
if (opflags & ISBGRND)
exit(1);
fprintf(stderr, "Can't access %s: ", spec);
errno = nfhret.stat;
perror(NULL);
return (0);
}
saddr.sin_port = htons(tport);
nfsargs.addr = &saddr;
nfsargs.fh = &nfhret.nfh;
nfsargs.hostname = nam;
return ((caddr_t)&nfsargs);
}
/*
* xdr routines for mount rpc's
*/
xdr_dir(xdrsp, dirp)
XDR *xdrsp;
char *dirp;
{
return (xdr_string(xdrsp, &dirp, RPCMNT_PATHLEN));
}
xdr_fh(xdrsp, np)
XDR *xdrsp;
struct nfhret *np;
{
if (!xdr_u_long(xdrsp, &(np->stat)))
return (0);
if (np->stat)
return (1);
return (xdr_opaque(xdrsp, (caddr_t)&(np->nfh), NFSX_FH));
}
#endif /* NFS */
Continuous source code history from original PDP-7 UNIX to FreeBSD 2, the first fully unencumbered FreeBSD release.