| 1 |
/* |
| 2 |
* Copyright (c) 2001 Dima Dorfman. |
| 3 |
* All rights reserved. |
| 4 |
* |
| 5 |
* Redistribution and use in source and binary forms, with or without |
| 6 |
* modification, are permitted provided that the following conditions |
| 7 |
* are met: |
| 8 |
* 1. Redistributions of source code must retain the above copyright |
| 9 |
* notice, this list of conditions and the following disclaimer. |
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* 2. Redistributions in binary form must reproduce the above copyright |
| 11 |
* notice, this list of conditions and the following disclaimer in the |
| 12 |
* documentation and/or other materials provided with the distribution. |
| 13 |
* |
| 14 |
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND |
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 16 |
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 17 |
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 19 |
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 24 |
* SUCH DAMAGE. |
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*/ |
| 26 |
|
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/* |
| 28 |
* mdmfs (md/MFS) is a wrapper around mdconfig(8), |
| 29 |
* newfs(8), and mount(8) that mimics the command line option set of |
| 30 |
* the deprecated mount_mfs(8). |
| 31 |
*/ |
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|
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#include <sys/cdefs.h> |
| 34 |
__FBSDID("$FreeBSD: src/sbin/mdmfs/mdmfs.c,v 1.33 2007/05/14 19:23:13 remko Exp $"); |
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|
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#include <sys/param.h> |
| 37 |
#include <sys/mdioctl.h> |
| 38 |
#include <sys/stat.h> |
| 39 |
#include <sys/wait.h> |
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|
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#include <assert.h> |
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#include <err.h> |
| 43 |
#include <fcntl.h> |
| 44 |
#include <grp.h> |
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#include <paths.h> |
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#include <pwd.h> |
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#include <stdarg.h> |
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#include <stdio.h> |
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#include <stdlib.h> |
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#include <string.h> |
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#include <ctype.h> |
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#include <unistd.h> |
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|
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typedef enum { false, true } bool; |
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|
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struct mtpt_info { |
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uid_t mi_uid; |
| 58 |
bool mi_have_uid; |
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gid_t mi_gid; |
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bool mi_have_gid; |
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mode_t mi_mode; |
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bool mi_have_mode; |
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}; |
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|
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static bool debug; /* Emit debugging information? */ |
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static bool loudsubs; /* Suppress output from helper programs? */ |
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static bool norun; /* Actually run the helper programs? */ |
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static int unit; /* The unit we're working with. */ |
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static const char *mdname; /* Name of memory disk device (e.g., "md"). */ |
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static const char *mdsuffix; /* Suffix of memory disk device (e.g., ".uzip"). */ |
| 71 |
static size_t mdnamelen; /* Length of mdname. */ |
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static const char *path_mdconfig =_PATH_MDCONFIG; |
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|
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static void argappend(char **, const char *, ...) __printflike(2, 3); |
| 75 |
static void debugprintf(const char *, ...) __printflike(1, 2); |
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static void do_mdconfig_attach(const char *, const enum md_types); |
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static void do_mdconfig_attach_au(const char *, const enum md_types); |
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static void do_mdconfig_detach(void); |
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static void do_mount(const char *, const char *); |
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static void do_mtptsetup(const char *, struct mtpt_info *); |
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static void do_newfs(const char *); |
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static void extract_ugid(const char *, struct mtpt_info *); |
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static int run(int *, const char *, ...) __printflike(2, 3); |
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static void usage(void); |
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|
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int |
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main(int argc, char **argv) |
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{ |
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struct mtpt_info mi; /* Mountpoint info. */ |
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char *mdconfig_arg, *newfs_arg, /* Args to helper programs. */ |
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*mount_arg; |
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enum md_types mdtype; /* The type of our memory disk. */ |
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bool have_mdtype; |
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bool detach, softdep, autounit, newfs; |
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char *mtpoint, *unitstr; |
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char *p; |
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int ch; |
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void *set; |
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unsigned long ul; |
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|
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/* Misc. initialization. */ |
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(void)memset(&mi, '\0', sizeof(mi)); |
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detach = true; |
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softdep = true; |
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autounit = false; |
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newfs = true; |
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have_mdtype = false; |
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mdtype = MD_SWAP; |
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mdname = MD_NAME; |
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mdnamelen = strlen(mdname); |
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/* |
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* Can't set these to NULL. They may be passed to the |
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* respective programs without modification. I.e., we may not |
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* receive any command-line options which will caused them to |
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* be modified. |
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*/ |
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mdconfig_arg = strdup(""); |
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newfs_arg = strdup(""); |
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mount_arg = strdup(""); |
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|
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/* If we were started as mount_mfs or mfs, imply -C. */ |
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if (strcmp(getprogname(), "mount_mfs") == 0 || |
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strcmp(getprogname(), "mfs") == 0) { |
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/* Make compatibility assumptions. */ |
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mi.mi_mode = 01777; |
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mi.mi_have_mode = true; |
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} |
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|
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while ((ch = getopt(argc, argv, |
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"a:b:Cc:Dd:E:e:F:f:hi:LlMm:NnO:o:Pp:Ss:t:Uv:w:X")) != -1) |
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switch (ch) { |
| 132 |
case 'a': |
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argappend(&newfs_arg, "-a %s", optarg); |
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break; |
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case 'b': |
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argappend(&newfs_arg, "-b %s", optarg); |
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break; |
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case 'C': |
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/* Ignored for compatibility. */ |
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break; |
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case 'c': |
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argappend(&newfs_arg, "-c %s", optarg); |
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break; |
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case 'D': |
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detach = false; |
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break; |
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case 'd': |
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argappend(&newfs_arg, "-d %s", optarg); |
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break; |
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case 'E': |
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path_mdconfig = optarg; |
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break; |
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case 'e': |
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argappend(&newfs_arg, "-e %s", optarg); |
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break; |
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case 'F': |
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if (have_mdtype) |
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usage(); |
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mdtype = MD_VNODE; |
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have_mdtype = true; |
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argappend(&mdconfig_arg, "-f %s", optarg); |
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break; |
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case 'f': |
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argappend(&newfs_arg, "-f %s", optarg); |
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break; |
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case 'h': |
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usage(); |
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break; |
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case 'i': |
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argappend(&newfs_arg, "-i %s", optarg); |
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break; |
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case 'L': |
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loudsubs = true; |
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break; |
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case 'l': |
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argappend(&newfs_arg, "-l"); |
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break; |
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case 'M': |
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if (have_mdtype) |
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usage(); |
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mdtype = MD_MALLOC; |
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have_mdtype = true; |
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break; |
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case 'm': |
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argappend(&newfs_arg, "-m %s", optarg); |
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break; |
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case 'N': |
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norun = true; |
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break; |
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case 'n': |
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argappend(&newfs_arg, "-n"); |
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break; |
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case 'O': |
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argappend(&newfs_arg, "-o %s", optarg); |
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break; |
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case 'o': |
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argappend(&mount_arg, "-o %s", optarg); |
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break; |
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case 'P': |
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newfs = false; |
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break; |
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case 'p': |
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if ((set = setmode(optarg)) == NULL) |
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usage(); |
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mi.mi_mode = getmode(set, S_IRWXU | S_IRWXG | S_IRWXO); |
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mi.mi_have_mode = true; |
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free(set); |
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break; |
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case 'S': |
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softdep = false; |
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break; |
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case 's': |
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argappend(&mdconfig_arg, "-s %s", optarg); |
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break; |
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case 'U': |
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softdep = true; |
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break; |
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case 'v': |
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argappend(&newfs_arg, "-O %s", optarg); |
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break; |
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case 'w': |
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extract_ugid(optarg, &mi); |
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break; |
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case 'X': |
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debug = true; |
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break; |
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default: |
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usage(); |
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} |
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argc -= optind; |
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argv += optind; |
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if (argc < 2) |
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usage(); |
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|
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/* Derive 'unit' (global). */ |
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unitstr = argv[0]; |
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if (strncmp(unitstr, "/dev/", 5) == 0) |
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unitstr += 5; |
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if (strncmp(unitstr, mdname, mdnamelen) == 0) |
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unitstr += mdnamelen; |
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if (!isdigit(*unitstr)) { |
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autounit = true; |
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unit = -1; |
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mdsuffix = unitstr; |
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} else { |
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ul = strtoul(unitstr, &p, 10); |
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if (ul == ULONG_MAX) |
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errx(1, "bad device unit: %s", unitstr); |
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unit = ul; |
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mdsuffix = p; /* can be empty */ |
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} |
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|
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mtpoint = argv[1]; |
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if (!have_mdtype) |
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mdtype = MD_SWAP; |
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if (softdep) |
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argappend(&newfs_arg, "-U"); |
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if (mdtype != MD_VNODE && !newfs) |
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errx(1, "-P requires a vnode-backed disk"); |
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|
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/* Do the work. */ |
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if (detach && !autounit) |
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do_mdconfig_detach(); |
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if (autounit) |
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do_mdconfig_attach_au(mdconfig_arg, mdtype); |
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else |
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do_mdconfig_attach(mdconfig_arg, mdtype); |
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if (newfs) |
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do_newfs(newfs_arg); |
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do_mount(mount_arg, mtpoint); |
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do_mtptsetup(mtpoint, &mi); |
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|
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return (0); |
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} |
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|
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/* |
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* Append the expansion of 'fmt' to the buffer pointed to by '*dstp'; |
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* reallocate as required. |
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*/ |
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static void |
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argappend(char **dstp, const char *fmt, ...) |
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{ |
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char *old, *new; |
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va_list ap; |
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|
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old = *dstp; |
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assert(old != NULL); |
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|
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va_start(ap, fmt); |
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if (vasprintf(&new, fmt,ap) == -1) |
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errx(1, "vasprintf"); |
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va_end(ap); |
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|
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*dstp = new; |
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if (asprintf(&new, "%s %s", old, new) == -1) |
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errx(1, "asprintf"); |
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free(*dstp); |
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free(old); |
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|
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*dstp = new; |
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} |
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|
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/* |
| 304 |
* If run-time debugging is enabled, print the expansion of 'fmt'. |
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* Otherwise, do nothing. |
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*/ |
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static void |
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debugprintf(const char *fmt, ...) |
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{ |
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va_list ap; |
| 311 |
|
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if (!debug) |
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return; |
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fprintf(stderr, "DEBUG: "); |
| 315 |
va_start(ap, fmt); |
| 316 |
vfprintf(stderr, fmt, ap); |
| 317 |
va_end(ap); |
| 318 |
fprintf(stderr, "\n"); |
| 319 |
fflush(stderr); |
| 320 |
} |
| 321 |
|
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/* |
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* Attach a memory disk with a known unit. |
| 324 |
*/ |
| 325 |
static void |
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do_mdconfig_attach(const char *args, const enum md_types mdtype) |
| 327 |
{ |
| 328 |
int rv; |
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const char *ta; /* Type arg. */ |
| 330 |
|
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switch (mdtype) { |
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case MD_SWAP: |
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ta = "-t swap"; |
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break; |
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case MD_VNODE: |
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ta = "-t vnode"; |
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break; |
| 338 |
case MD_MALLOC: |
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ta = "-t malloc"; |
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break; |
| 341 |
default: |
| 342 |
abort(); |
| 343 |
} |
| 344 |
rv = run(NULL, "%s -a %s%s -u %s%d", path_mdconfig, ta, args, |
| 345 |
mdname, unit); |
| 346 |
if (rv) |
| 347 |
errx(1, "mdconfig (attach) exited with error code %d", rv); |
| 348 |
} |
| 349 |
|
| 350 |
/* |
| 351 |
* Attach a memory disk with an unknown unit; use autounit. |
| 352 |
*/ |
| 353 |
static void |
| 354 |
do_mdconfig_attach_au(const char *args, const enum md_types mdtype) |
| 355 |
{ |
| 356 |
const char *ta; /* Type arg. */ |
| 357 |
char *linep, *linebuf; /* Line pointer, line buffer. */ |
| 358 |
int fd; /* Standard output of mdconfig invocation. */ |
| 359 |
FILE *sfd; |
| 360 |
int rv; |
| 361 |
char *p; |
| 362 |
size_t linelen; |
| 363 |
unsigned long ul; |
| 364 |
|
| 365 |
switch (mdtype) { |
| 366 |
case MD_SWAP: |
| 367 |
ta = "-t swap"; |
| 368 |
break; |
| 369 |
case MD_VNODE: |
| 370 |
ta = "-t vnode"; |
| 371 |
break; |
| 372 |
case MD_MALLOC: |
| 373 |
ta = "-t malloc"; |
| 374 |
break; |
| 375 |
default: |
| 376 |
abort(); |
| 377 |
} |
| 378 |
rv = run(&fd, "%s -a %s%s", path_mdconfig, ta, args); |
| 379 |
if (rv) |
| 380 |
errx(1, "mdconfig (attach) exited with error code %d", rv); |
| 381 |
|
| 382 |
/* Receive the unit number. */ |
| 383 |
if (norun) { /* Since we didn't run, we can't read. Fake it. */ |
| 384 |
unit = 0; |
| 385 |
return; |
| 386 |
} |
| 387 |
sfd = fdopen(fd, "r"); |
| 388 |
if (sfd == NULL) |
| 389 |
err(1, "fdopen"); |
| 390 |
linep = fgetln(sfd, &linelen); |
| 391 |
if (linep == NULL && linelen < mdnamelen + 1) |
| 392 |
errx(1, "unexpected output from mdconfig (attach)"); |
| 393 |
/* If the output format changes, we want to know about it. */ |
| 394 |
assert(strncmp(linep, mdname, mdnamelen) == 0); |
| 395 |
linebuf = malloc(linelen - mdnamelen + 1); |
| 396 |
assert(linebuf != NULL); |
| 397 |
/* Can't use strlcpy because linep is not NULL-terminated. */ |
| 398 |
strncpy(linebuf, linep + mdnamelen, linelen); |
| 399 |
linebuf[linelen] = '\0'; |
| 400 |
ul = strtoul(linebuf, &p, 10); |
| 401 |
if (ul == ULONG_MAX || *p != '\n') |
| 402 |
errx(1, "unexpected output from mdconfig (attach)"); |
| 403 |
unit = ul; |
| 404 |
|
| 405 |
fclose(sfd); |
| 406 |
close(fd); |
| 407 |
} |
| 408 |
|
| 409 |
/* |
| 410 |
* Detach a memory disk. |
| 411 |
*/ |
| 412 |
static void |
| 413 |
do_mdconfig_detach(void) |
| 414 |
{ |
| 415 |
int rv; |
| 416 |
|
| 417 |
rv = run(NULL, "%s -d -u %s%d", path_mdconfig, mdname, unit); |
| 418 |
if (rv && debug) /* This is allowed to fail. */ |
| 419 |
warnx("mdconfig (detach) exited with error code %d (ignored)", |
| 420 |
rv); |
| 421 |
} |
| 422 |
|
| 423 |
/* |
| 424 |
* Mount the configured memory disk. |
| 425 |
*/ |
| 426 |
static void |
| 427 |
do_mount(const char *args, const char *mtpoint) |
| 428 |
{ |
| 429 |
int rv; |
| 430 |
|
| 431 |
rv = run(NULL, "%s%s /dev/%s%d%s %s", _PATH_MOUNT, args, |
| 432 |
mdname, unit, mdsuffix, mtpoint); |
| 433 |
if (rv) |
| 434 |
errx(1, "mount exited with error code %d", rv); |
| 435 |
} |
| 436 |
|
| 437 |
/* |
| 438 |
* Various configuration of the mountpoint. Mostly, enact 'mip'. |
| 439 |
*/ |
| 440 |
static void |
| 441 |
do_mtptsetup(const char *mtpoint, struct mtpt_info *mip) |
| 442 |
{ |
| 443 |
|
| 444 |
if (mip->mi_have_mode) { |
| 445 |
debugprintf("changing mode of %s to %o.", mtpoint, |
| 446 |
mip->mi_mode); |
| 447 |
if (!norun) |
| 448 |
if (chmod(mtpoint, mip->mi_mode) == -1) |
| 449 |
err(1, "chmod: %s", mtpoint); |
| 450 |
} |
| 451 |
/* |
| 452 |
* We have to do these separately because the user may have |
| 453 |
* only specified one of them. |
| 454 |
*/ |
| 455 |
if (mip->mi_have_uid) { |
| 456 |
debugprintf("changing owner (user) or %s to %u.", mtpoint, |
| 457 |
mip->mi_uid); |
| 458 |
if (!norun) |
| 459 |
if (chown(mtpoint, mip->mi_uid, -1) == -1) |
| 460 |
err(1, "chown %s to %u (user)", mtpoint, |
| 461 |
mip->mi_uid); |
| 462 |
} |
| 463 |
if (mip->mi_have_gid) { |
| 464 |
debugprintf("changing owner (group) or %s to %u.", mtpoint, |
| 465 |
mip->mi_gid); |
| 466 |
if (!norun) |
| 467 |
if (chown(mtpoint, -1, mip->mi_gid) == -1) |
| 468 |
err(1, "chown %s to %u (group)", mtpoint, |
| 469 |
mip->mi_gid); |
| 470 |
} |
| 471 |
} |
| 472 |
|
| 473 |
/* |
| 474 |
* Put a file system on the memory disk. |
| 475 |
*/ |
| 476 |
static void |
| 477 |
do_newfs(const char *args) |
| 478 |
{ |
| 479 |
int rv; |
| 480 |
|
| 481 |
rv = run(NULL, "%s%s /dev/%s%d", _PATH_NEWFS, args, mdname, unit); |
| 482 |
if (rv) |
| 483 |
errx(1, "newfs exited with error code %d", rv); |
| 484 |
} |
| 485 |
|
| 486 |
/* |
| 487 |
* 'str' should be a user and group name similar to the last argument |
| 488 |
* to chown(1); i.e., a user, followed by a colon, followed by a |
| 489 |
* group. The user and group in 'str' may be either a [ug]id or a |
| 490 |
* name. Upon return, the uid and gid fields in 'mip' will contain |
| 491 |
* the uid and gid of the user and group name in 'str', respectively. |
| 492 |
* |
| 493 |
* In other words, this derives a user and group id from a string |
| 494 |
* formatted like the last argument to chown(1). |
| 495 |
* |
| 496 |
* Notice: At this point we don't support only a username or only a |
| 497 |
* group name. do_mtptsetup already does, so when this feature is |
| 498 |
* desired, this is the only routine that needs to be changed. |
| 499 |
*/ |
| 500 |
static void |
| 501 |
extract_ugid(const char *str, struct mtpt_info *mip) |
| 502 |
{ |
| 503 |
char *ug; /* Writable 'str'. */ |
| 504 |
char *user, *group; /* Result of extracton. */ |
| 505 |
struct passwd *pw; |
| 506 |
struct group *gr; |
| 507 |
char *p; |
| 508 |
uid_t *uid; |
| 509 |
gid_t *gid; |
| 510 |
|
| 511 |
uid = &mip->mi_uid; |
| 512 |
gid = &mip->mi_gid; |
| 513 |
mip->mi_have_uid = mip->mi_have_gid = false; |
| 514 |
|
| 515 |
/* Extract the user and group from 'str'. Format above. */ |
| 516 |
ug = strdup(str); |
| 517 |
assert(ug != NULL); |
| 518 |
group = ug; |
| 519 |
user = strsep(&group, ":"); |
| 520 |
if (user == NULL || group == NULL || *user == '\0' || *group == '\0') |
| 521 |
usage(); |
| 522 |
|
| 523 |
/* Derive uid. */ |
| 524 |
*uid = strtoul(user, &p, 10); |
| 525 |
if (*uid == (uid_t)ULONG_MAX) |
| 526 |
usage(); |
| 527 |
if (*p != '\0') { |
| 528 |
pw = getpwnam(user); |
| 529 |
if (pw == NULL) |
| 530 |
errx(1, "invalid user: %s", user); |
| 531 |
*uid = pw->pw_uid; |
| 532 |
} |
| 533 |
mip->mi_have_uid = true; |
| 534 |
|
| 535 |
/* Derive gid. */ |
| 536 |
*gid = strtoul(group, &p, 10); |
| 537 |
if (*gid == (gid_t)ULONG_MAX) |
| 538 |
usage(); |
| 539 |
if (*p != '\0') { |
| 540 |
gr = getgrnam(group); |
| 541 |
if (gr == NULL) |
| 542 |
errx(1, "invalid group: %s", group); |
| 543 |
*gid = gr->gr_gid; |
| 544 |
} |
| 545 |
mip->mi_have_gid = true; |
| 546 |
|
| 547 |
free(ug); |
| 548 |
} |
| 549 |
|
| 550 |
/* |
| 551 |
* Run a process with command name and arguments pointed to by the |
| 552 |
* formatted string 'cmdline'. Since system(3) is not used, the first |
| 553 |
* space-delimited token of 'cmdline' must be the full pathname of the |
| 554 |
* program to run. The return value is the return code of the process |
| 555 |
* spawned. If 'ofd' is non-NULL, it is set to the standard output of |
| 556 |
* the program spawned (i.e., you can read from ofd and get the output |
| 557 |
* of the program). |
| 558 |
*/ |
| 559 |
static int |
| 560 |
run(int *ofd, const char *cmdline, ...) |
| 561 |
{ |
| 562 |
char **argv, **argvp; /* Result of splitting 'cmd'. */ |
| 563 |
int argc; |
| 564 |
char *cmd; /* Expansion of 'cmdline'. */ |
| 565 |
int pid, status; /* Child info. */ |
| 566 |
int pfd[2]; /* Pipe to the child. */ |
| 567 |
int nfd; /* Null (/dev/null) file descriptor. */ |
| 568 |
bool dup2dn; /* Dup /dev/null to stdout? */ |
| 569 |
va_list ap; |
| 570 |
char *p; |
| 571 |
int rv, i; |
| 572 |
|
| 573 |
dup2dn = true; |
| 574 |
va_start(ap, cmdline); |
| 575 |
rv = vasprintf(&cmd, cmdline, ap); |
| 576 |
if (rv == -1) |
| 577 |
err(1, "vasprintf"); |
| 578 |
va_end(ap); |
| 579 |
|
| 580 |
/* Split up 'cmd' into 'argv' for use with execve. */ |
| 581 |
for (argc = 1, p = cmd; (p = strchr(p, ' ')) != NULL; p++) |
| 582 |
argc++; /* 'argc' generation loop. */ |
| 583 |
argv = (char **)malloc(sizeof(*argv) * (argc + 1)); |
| 584 |
assert(argv != NULL); |
| 585 |
for (p = cmd, argvp = argv; (*argvp = strsep(&p, " ")) != NULL;) |
| 586 |
if (**argvp != '\0') |
| 587 |
if (++argvp >= &argv[argc]) { |
| 588 |
*argvp = NULL; |
| 589 |
break; |
| 590 |
} |
| 591 |
assert(*argv); |
| 592 |
/* The argv array ends up NULL-terminated here. */ |
| 593 |
|
| 594 |
/* Make sure the above loop works as expected. */ |
| 595 |
if (debug) { |
| 596 |
/* |
| 597 |
* We can't, but should, use debugprintf here. First, |
| 598 |
* it appends a trailing newline to the output, and |
| 599 |
* second it prepends "DEBUG: " to the output. The |
| 600 |
* former is a problem for this would-be first call, |
| 601 |
* and the latter for the would-be call inside the |
| 602 |
* loop. |
| 603 |
*/ |
| 604 |
(void)fprintf(stderr, "DEBUG: running:"); |
| 605 |
/* Should be equivilent to 'cmd' (before strsep, of course). */ |
| 606 |
for (i = 0; argv[i] != NULL; i++) |
| 607 |
(void)fprintf(stderr, " %s", argv[i]); |
| 608 |
(void)fprintf(stderr, "\n"); |
| 609 |
} |
| 610 |
|
| 611 |
/* Create a pipe if necessary and fork the helper program. */ |
| 612 |
if (ofd != NULL) { |
| 613 |
if (pipe(&pfd[0]) == -1) |
| 614 |
err(1, "pipe"); |
| 615 |
*ofd = pfd[0]; |
| 616 |
dup2dn = false; |
| 617 |
} |
| 618 |
pid = fork(); |
| 619 |
switch (pid) { |
| 620 |
case 0: |
| 621 |
/* XXX can we call err() in here? */ |
| 622 |
if (norun) |
| 623 |
_exit(0); |
| 624 |
if (ofd != NULL) |
| 625 |
if (dup2(pfd[1], STDOUT_FILENO) < 0) |
| 626 |
err(1, "dup2"); |
| 627 |
if (!loudsubs) { |
| 628 |
nfd = open(_PATH_DEVNULL, O_RDWR); |
| 629 |
if (nfd == -1) |
| 630 |
err(1, "open: %s", _PATH_DEVNULL); |
| 631 |
if (dup2(nfd, STDIN_FILENO) < 0) |
| 632 |
err(1, "dup2"); |
| 633 |
if (dup2dn) |
| 634 |
if (dup2(nfd, STDOUT_FILENO) < 0) |
| 635 |
err(1, "dup2"); |
| 636 |
if (dup2(nfd, STDERR_FILENO) < 0) |
| 637 |
err(1, "dup2"); |
| 638 |
} |
| 639 |
|
| 640 |
(void)execv(argv[0], argv); |
| 641 |
warn("exec: %s", argv[0]); |
| 642 |
_exit(-1); |
| 643 |
case -1: |
| 644 |
err(1, "fork"); |
| 645 |
} |
| 646 |
|
| 647 |
free(cmd); |
| 648 |
free(argv); |
| 649 |
while (waitpid(pid, &status, 0) != pid) |
| 650 |
; |
| 651 |
return (WEXITSTATUS(status)); |
| 652 |
} |
| 653 |
|
| 654 |
static void |
| 655 |
usage(void) |
| 656 |
{ |
| 657 |
|
| 658 |
fprintf(stderr, |
| 659 |
"usage: %s [-DLlMNnPSUX] [-a maxcontig] [-b block-size]\n" |
| 660 |
"\t[-c blocks-per-cylinder-group][-d max-extent-size] [-E path-mdconfig]\n" |
| 661 |
"\t[-e maxbpg] [-F file] [-f frag-size] [-i bytes] [-m percent-free]\n" |
| 662 |
"\t[-O optimization] [-o mount-options]\n" |
| 663 |
"\t[-p permissions] [-s size] [-v version] [-w user:group]\n" |
| 664 |
"\tmd-device mount-point\n", getprogname()); |
| 665 |
exit(1); |
| 666 |
} |
