Book a Demo!
CoCalc Logo Icon
StoreFeaturesDocsShareSupportNewsAboutPoliciesSign UpSign In
att
GitHub Repository: att/ast
 Path: blob/master/src/lib/libcmd/mkfifo.c
1808 views
1
/***********************************************************************

2
*                                                                      *

3
*               This software is part of the ast package               *

4
*          Copyright (c) 1992-2012 AT&T Intellectual Property          *

5
*                      and is licensed under the                       *

6
*                 Eclipse Public License, Version 1.0                  *

7
*                    by AT&T Intellectual Property                     *

8
*                                                                      *

9
*                A copy of the License is available at                 *

10
*          http://www.eclipse.org/org/documents/epl-v10.html           *

11
*         (with md5 checksum b35adb5213ca9657e911e9befb180842)         *

12
*                                                                      *

13
*              Information and Software Systems Research               *

14
*                            AT&T Research                             *

15
*                           Florham Park NJ                            *

16
*                                                                      *

17
*                 Glenn Fowler <[email protected]>                  *

18
*                  David Korn <[email protected]>                   *

19
*                                                                      *

20
***********************************************************************/

21
#pragma prototyped

22
/*

23
 * David Korn

24
 * AT&T Bell Laboratories

25
 *

26
 * mkfifo

27
 */

28


29
static const char usage[] =

30
"[-?\n@(#)$Id: mkfifo (AT&T Research) 2009-01-02 $\n]"

31
USAGE_LICENSE

32
"[+NAME?mkfifo - make FIFOs (named pipes)]"

33
"[+DESCRIPTION?\bmkfifo\b creates one or more FIFO's.  By "

34
	"default, the mode of created FIFO is \ba=rw\b minus the "

35
	"bits set in the \bumask\b(1).]"

36
"[m:mode]:[mode?Set the mode of created FIFO to \amode\a.  "

37
	"\amode\a is symbolic or octal mode as in \bchmod\b(1).  Relative "

38
	"modes assume an initial mode of \ba=rw\b.]"

39
"\n"

40
"\nfile ...\n"

41
"\n"

42
"[+EXIT STATUS?]{"

43
        "[+0?All FIFO's created successfully.]"

44
        "[+>0?One or more FIFO's could not be created.]"

45
"}"

46
"[+SEE ALSO?\bchmod\b(1), \bumask\b(1)]"

47
;

48


49
#include <cmd.h>

50
#include <ls.h>

51


52
int

53
b_mkfifo(int argc, char** argv, Shbltin_t* context)

54
{

55
	register char*	arg;

56
	register mode_t mode = S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP|S_IROTH|S_IWOTH;

57
	register mode_t	mask = 0;

58
	register int	mflag = 0;

59


60
	cmdinit(argc, argv, context, ERROR_CATALOG, 0);

61
	for (;;)

62
	{

63
		switch (optget(argv, usage))

64
		{

65
		case 'm':

66
			mflag = 1;

67
			mode = strperm(arg = opt_info.arg, &opt_info.arg, mode);

68
			if (*opt_info.arg)

69
				error(ERROR_exit(0), "%s: invalid mode", arg);

70
			continue;

71
		case ':':

72
			error(2, "%s", opt_info.arg);

73
			break;

74
		case '?':

75
			error(ERROR_usage(2), "%s", opt_info.arg);

76
			break;

77
		}

78
		break;

79
	}

80
	argv += opt_info.index;

81
	if (error_info.errors || !*argv)

82
		error(ERROR_usage(2), "%s", optusage(NiL));

83
	mask = umask(0);

84
	if (!mflag)

85
	{

86
		mode &= ~mask;

87
		umask(mask);

88
		mask = 0;

89
	}

90
	while (arg = *argv++)

91
		if (mkfifo(arg, mode) < 0)

92
			error(ERROR_system(0), "%s:", arg);

93
	if (mask)

94
		umask(mask);

95
	return error_info.errors != 0;

96
}

97


98