146 lines
3.5 KiB
C
146 lines
3.5 KiB
C
/* mkfifo - make FIFOs */
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/* See Makefile for compilation details. */
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/*
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Copyright (C) 1999-2020 Free Software Foundation, Inc.
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This file is part of GNU Bash.
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Bash is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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Bash is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with Bash. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <config.h>
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#include "bashtypes.h"
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#include "posixstat.h"
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#include <errno.h>
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#include <stdio.h>
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#include "bashansi.h"
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#if defined (HAVE_UNISTD_H)
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# include <unistd.h>
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#endif
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#include "builtins.h"
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#include "shell.h"
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#include "bashgetopt.h"
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#include "common.h"
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#if !defined (errno)
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extern int errno;
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#endif
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#define ISOCTAL(c) ((c) >= '0' && (c) <= '7')
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extern int parse_symbolic_mode ();
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static int original_umask;
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int
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mkfifo_builtin (list)
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WORD_LIST *list;
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{
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int opt, mflag, omode, rval, nmode, basemode;
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char *mode;
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WORD_LIST *l;
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mflag = 0;
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mode = (char *)NULL;
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reset_internal_getopt ();
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while ((opt = internal_getopt(list, "m:")) != -1)
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switch (opt)
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{
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case 'm':
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mflag = 1;
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mode = list_optarg;
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break;
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CASE_HELPOPT;
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default:
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builtin_usage();
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return (EX_USAGE);
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}
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list = loptend;
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if (list == 0)
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{
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builtin_usage ();
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return (EX_USAGE);
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}
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basemode = S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH;
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if (mode == NULL)
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omode = basemode;
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else if (ISOCTAL (*mode)) /* octal number */
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{
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omode = read_octal (mode);
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if (omode < 0)
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{
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builtin_error ("invalid file mode: %s", mode);
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return (EXECUTION_FAILURE);
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}
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}
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else /* symbolic mode */
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{
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/* initial bits are a=rwx; the mode argument modifies them */
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omode = parse_symbolic_mode (mode, basemode);
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if (omode < 0)
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{
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builtin_error ("invalid file mode: %s", mode);
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return (EXECUTION_FAILURE);
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}
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}
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/* Make the new mode */
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original_umask = umask (0);
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umask (original_umask);
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nmode = basemode & ~original_umask;
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/* Adjust new mode based on mode argument */
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nmode &= omode;
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for (rval = EXECUTION_SUCCESS, l = list; l; l = l->next)
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{
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if (mkfifo (l->word->word, nmode) < 0)
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{
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builtin_error ("cannot create FIFO `%s': %s", l->word->word, strerror (errno));
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rval = EXECUTION_FAILURE;
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}
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}
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return rval;
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}
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char *mkfifo_doc[] = {
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"Create FIFOs (named pipes).",
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"",
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"Make FIFOs. Create the FIFOs named as arguments, in",
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"the order specified, using mode a=rw as modified by the current",
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"umask (see `help umask'). The -m option causes the file permission",
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"bits of the final FIFO to be MODE. The MODE argument may be",
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"an octal number or a symbolic mode like that used by chmod(1). If",
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"a symbolic mode is used, the operations are interpreted relative to",
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"an initial mode of \"a=rw\". mkfifo returns 0 if the FIFOs are",
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"umask, plus write and search permissions for the owner. mkdir",
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"created successfully, and non-zero if an error occurs.",
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(char *)NULL
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};
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struct builtin mkfifo_struct = {
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"mkfifo",
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mkfifo_builtin,
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BUILTIN_ENABLED,
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mkfifo_doc,
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"mkfifo [-m mode] fifo_name [fifo_name ...]",
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0
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};
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