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/* 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
};
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