summaryrefslogtreecommitdiff
path: root/src/mkfifo.c
blob: 2fa279e8e74a90345e09757be8940529a2504bc6 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
/* mkfifo -- make fifo's (named pipes)
   Copyright (C) 90, 91, 1995-2002 Free Software Foundation, Inc.

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2, or (at your option)
   any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software Foundation,
   Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */

/* David MacKenzie <djm@ai.mit.edu>  */

#include <config.h>
#include <stdio.h>
#include <getopt.h>
#include <sys/types.h>

#include "system.h"
#include "error.h"
#include "modechange.h"
#include "quote.h"

/* The official name of this program (e.g., no `g' prefix).  */
#define PROGRAM_NAME "mkfifo"

#define AUTHORS "David MacKenzie"

/* The name this program was run with. */
char *program_name;

static struct option const longopts[] =
{
  {"mode", required_argument, NULL, 'm'},
  {GETOPT_HELP_OPTION_DECL},
  {GETOPT_VERSION_OPTION_DECL},
  {NULL, 0, NULL, 0}
};

#ifdef S_ISFIFO
void
usage (int status)
{
  if (status != 0)
    fprintf (stderr, _("Try `%s --help' for more information.\n"),
	     program_name);
  else
    {
      printf (_("Usage: %s [OPTION] NAME...\n"), program_name);
      fputs (_("\
Create named pipes (FIFOs) with the given NAMEs.\n\
\n\
"), stdout);
      fputs (_("\
Mandatory arguments to long options are mandatory for short options too.\n\
"), stdout);
      fputs (_("\
  -m, --mode=MODE   set permission mode (as in chmod), not a=rw - umask\n\
"), stdout);
      fputs (HELP_OPTION_DESCRIPTION, stdout);
      fputs (VERSION_OPTION_DESCRIPTION, stdout);
      printf (_("\nReport bugs to <%s>.\n"), PACKAGE_BUGREPORT);
    }
  exit (status);
}
#endif

int
main (int argc, char **argv)
{
  mode_t newmode;
  struct mode_change *change;
  const char *specified_mode;
  int errors = 0;
  int optc;

  program_name = argv[0];
  setlocale (LC_ALL, "");
  bindtextdomain (PACKAGE, LOCALEDIR);
  textdomain (PACKAGE);

  atexit (close_stdout);

  specified_mode = NULL;

#ifndef S_ISFIFO
  error (4, 0, _("fifo files not supported"));
#else
  while ((optc = getopt_long (argc, argv, "m:", longopts, NULL)) != -1)
    {
      switch (optc)
	{
	case 0:
	  break;
	case 'm':
	  specified_mode = optarg;
	  break;
	case_GETOPT_HELP_CHAR;
	case_GETOPT_VERSION_CHAR (PROGRAM_NAME, AUTHORS);
	default:
	  usage (EXIT_FAILURE);
	}
    }

  if (optind == argc)
    {
      error (0, 0, _("too few arguments"));
      usage (EXIT_FAILURE);
    }

  newmode = (S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH);
  if (specified_mode)
    {
      newmode &= ~ umask (0);
      change = mode_compile (specified_mode, 0);
      if (change == MODE_INVALID)
	error (EXIT_FAILURE, 0, _("invalid mode"));
      else if (change == MODE_MEMORY_EXHAUSTED)
	xalloc_die ();
      newmode = mode_adjust (newmode, change);
    }

  for (; optind < argc; ++optind)
    {
      int fail = mkfifo (argv[optind], newmode);
      if (fail)
	error (0, errno, _("cannot create fifo %s"), quote (argv[optind]));

      /* If the containing directory happens to have a default ACL, chmod
	 ensures the file mode permission bits are still set as desired.  */

      if (fail == 0 && specified_mode)
 	{
 	  fail = chmod (argv[optind], newmode);
	  if (fail)
	    error (0, errno, _("cannot set permissions of fifo %s"),
		   quote (argv[optind]));
 	}

      if (fail)
 	errors = 1;
    }

  exit (errors);
#endif
}