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utils-std

Collection of commonly available Unix tools git clone https://anongit.hacktivis.me/git/utils-std.git/

mkfifo.c (1972B)

    

  1. // utils-std: Collection of commonly available Unix tools
  2. // SPDX-FileCopyrightText: 2017 Haelwenn (lanodan) Monnier <contact+utils@hacktivis.me>
  3. // SPDX-License-Identifier: MPL-2.0
  5. #define _POSIX_C_SOURCE 200809L
  7. #include "../config.h"
  8. #include "../libutils/getopt_nolong.h"
  9. #include "../libutils/mode.h"
  11. #include <errno.h>
  12. #include <stdio.h>    // fprintf
  13. #include <stdlib.h>   // abort
  14. #include <string.h>   // strerror
  15. #include <sys/stat.h> // mkfifo
  16. #include <unistd.h>   // getopt
  17. #ifdef HAS_GETOPT_LONG
  18. #include <getopt.h>
  19. #endif
  21. mode_t filemask;
  22. const char *argv0 = "mkfifo";
  24. static void
  25. usage(void)
  26. {
  27. 	fprintf(stderr, "Usage: mkfifo [-m mode] file\n");
  28. }
  30. int
  31. main(int argc, char *argv[])
  32. {
  33. 	mode_t mode = 0666;
  35. 	const char *errstr = NULL;
  37. #ifdef HAS_GETOPT_LONG
  38. 	// Strictly for GNUisms compatibility so no long-only options
  39. 	// clang-format off
  40. 	static struct option opts[] = {
  41. 		{"mode", required_argument, NULL, 'm'},
  42. 		{0, 0, 0, 0},
  43. 	};
  44. 	// clang-format on
  46. 	// Need + as first character to get POSIX-style option parsing
  47. 	for(int c = -1; (c = getopt_long(argc, argv, "+:m:", opts, NULL)) != -1;)
  48. #else
  49. 	for(int c = -1; (c = getopt_nolong(argc, argv, ":m:")) != -1;)
  50. #endif
  51. 	{
  52. 		switch(c)
  53. 		{
  54. 		case 'm':
  55. 			mode = new_mode(optarg, 0666, &errstr);
  56. 			if(errstr != NULL)
  57. 			{
  58. 				fprintf(stderr, "mkfifo: error: Failed parsing mode '%s': %s\n", optarg, errstr);
  59. 				return 1;
  60. 			}
  61. 			break;
  62. 		case ':':
  63. 			fprintf(stderr, "mkfifo: error: Missing operand for option: '-%c'\n", optopt);
  64. 			usage();
  65. 			return 1;
  66. 		case '?':
  67. 			GETOPT_UNKNOWN_OPT
  68. 			usage();
  69. 			return 1;
  70. 		default:
  71. 			abort();
  72. 		}
  73. 	}
  75. 	argc -= optind;
  76. 	argv += optind;
  78. 	if(argc < 1)
  79. 	{
  80. 		fprintf(stderr, "mkfifo: error: Missing file argument\n");
  81. 		usage();
  82. 		return 1;
  83. 	}
  85. 	for(int i = 0; i < argc; i++)
  86. 	{
  87. 		if(mkfifo(argv[i], mode) != 0)
  88. 		{
  89. 			fprintf(
  90. 			    stderr, "mkfifo: error: Failed creating FIFO at '%s': %s\n", argv[i], strerror(errno));
  91. 			return 1;
  92. 		}
  93. 	}
  95. 	return 0;
  96. }