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
|
/* mkfifo - make FIFOs */
/* See Makefile for compilation details. */
/*
Copyright (C) 1999-2020 Free Software Foundation, Inc.
This file is part of GNU Bash.
Bash 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 3 of the License, or
(at your option) any later version.
Bash 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 Bash. If not, see <http://www.gnu.org/licenses/>.
*/
#include <config.h>
#include "bashtypes.h"
#include "posixstat.h"
#include <errno.h>
#include <stdio.h>
#include "bashansi.h"
#if defined (HAVE_UNISTD_H)
# include <unistd.h>
#endif
#include "builtins.h"
#include "shell.h"
#include "bashgetopt.h"
#include "common.h"
#if !defined (errno)
extern int errno;
#endif
#define ISOCTAL(c) ((c) >= '0' && (c) <= '7')
extern int parse_symbolic_mode ();
static int original_umask;
int
mkfifo_builtin (list)
WORD_LIST *list;
{
int opt, mflag, omode, rval, nmode, basemode;
char *mode;
WORD_LIST *l;
mflag = 0;
mode = (char *)NULL;
reset_internal_getopt ();
while ((opt = internal_getopt(list, "m:")) != -1)
switch (opt)
{
case 'm':
mflag = 1;
mode = list_optarg;
break;
CASE_HELPOPT;
default:
builtin_usage();
return (EX_USAGE);
}
list = loptend;
if (list == 0)
{
builtin_usage ();
return (EX_USAGE);
}
basemode = S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH;
if (mode == NULL)
omode = basemode;
else if (ISOCTAL (*mode)) /* octal number */
{
omode = read_octal (mode);
if (omode < 0)
{
builtin_error ("invalid file mode: %s", mode);
return (EXECUTION_FAILURE);
}
}
else /* symbolic mode */
{
/* initial bits are a=rwx; the mode argument modifies them */
omode = parse_symbolic_mode (mode, basemode);
if (omode < 0)
{
builtin_error ("invalid file mode: %s", mode);
return (EXECUTION_FAILURE);
}
}
/* Make the new mode */
original_umask = umask (0);
umask (original_umask);
nmode = basemode & ~original_umask;
/* Adjust new mode based on mode argument */
nmode &= omode;
for (rval = EXECUTION_SUCCESS, l = list; l; l = l->next)
{
if (mkfifo (l->word->word, nmode) < 0)
{
builtin_error ("cannot create FIFO `%s': %s", l->word->word, strerror (errno));
rval = EXECUTION_FAILURE;
}
}
return rval;
}
char *mkfifo_doc[] = {
"Create FIFOs (named pipes).",
"",
"Make FIFOs. Create the FIFOs named as arguments, in",
"the order specified, using mode a=rw as modified by the current",
"umask (see `help umask'). The -m option causes the file permission",
"bits of the final FIFO to be MODE. The MODE argument may be",
"an octal number or a symbolic mode like that used by chmod(1). If",
"a symbolic mode is used, the operations are interpreted relative to",
"an initial mode of \"a=rw\". mkfifo returns 0 if the FIFOs are",
"umask, plus write and search permissions for the owner. mkdir",
"created successfully, and non-zero if an error occurs.",
(char *)NULL
};
struct builtin mkfifo_struct = {
"mkfifo",
mkfifo_builtin,
BUILTIN_ENABLED,
mkfifo_doc,
"mkfifo [-m mode] fifo_name [fifo_name ...]",
0
};
|