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utils-std

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

install.c (7758B)

    

  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. // For copy_file_range
  6. #define _GNU_SOURCE     // musl, glibc
  7. #define _DEFAULT_SOURCE // FreeBSD
  9. #include "../config.h" // HAS_*
  10. #include "../lib/fs.h"
  11. #include "../lib/getopt_nolong.h"
  12. #include "../lib/lib_mkdir.h"
  13. #include "../lib/mode.h"
  14. #include "../lib/user_group_parse.h"
  16. #include <assert.h>
  17. #include <errno.h>
  18. #include <fcntl.h>  // linkat, AT_SYMLINK_FOLLOW
  19. #include <libgen.h> // dirname
  20. #include <limits.h> // PATH_MAX
  21. #include <stdbool.h>
  22. #include <stdio.h>  // fprintf
  23. #include <string.h> // strerror
  24. #include <sys/stat.h>
  25. #include <unistd.h> // getopt
  26. #ifdef HAS_GETOPT_LONG
  27. #include <getopt.h>
  28. #endif
  30. bool preserve_times = false, create_directories = false;
  32. // See lib/lib_mkdir.c
  33. bool mkdir_parents_verbose = false;
  34. mode_t mkdir_parents_filemask;
  36. mode_t mode = 00755;
  37. uid_t user = (uid_t)-1;
  38. gid_t group = (gid_t)-1;
  39. const char *argv0 = "install";
  41. bool opt_v = false;
  43. static int
  44. do_install(char *src, char *dest, bool is_dir)
  45. {
  46. 	int src_fd = open(src, O_RDONLY);
  47. 	if(src_fd < 0)
  48. 	{
  49. 		fprintf(stderr,
  50. 		        "%s: error: Failed opening file '%s' for reading: %s\n",
  51. 		        argv0,
  52. 		        src,
  53. 		        strerror(errno));
  54. 		return -1;
  55. 	}
  57. 	struct stat src_stat;
  58. 	if(fstat(src_fd, &src_stat) < 0)
  59. 	{
  60. 		fprintf(stderr,
  61. 		        "%s: error: Failed getting status for source '%s': %s\n",
  62. 		        argv0,
  63. 		        dest,
  64. 		        strerror(errno));
  65. 		return -1;
  66. 	}
  68. 	if(!is_dir)
  69. 	{
  70. 		struct stat dest_stat;
  71. 		if(stat(dest, &dest_stat) < 0)
  72. 		{
  73. 			if(errno != ENOENT)
  74. 			{
  75. 				fprintf(stderr,
  76. 				        "%s: error: Failed getting status for destination '%s': %s\n",
  77. 				        argv0,
  78. 				        dest,
  79. 				        strerror(errno));
  80. 				return -1;
  81. 			}
  82. 			else
  83. 				errno = 0;
  84. 		}
  85. 		else
  86. 		{
  87. 			if(S_ISDIR(dest_stat.st_mode))
  88. 			{
  89. 				is_dir = true;
  90. 			}
  91. 			else
  92. 			{
  93. 				if(unlink(dest) < 0)
  94. 				{
  95. 					fprintf(stderr,
  96. 					        "%s: error: Failed removing existing file at destination '%s': %s\n",
  97. 					        argv0,
  98. 					        dest,
  99. 					        strerror(errno));
  100. 					return -1;
  101. 				}
  102. 			}
  103. 		}
  104. 	}
  106. 	char *dest_path = dest;
  108. 	if(is_dir)
  109. 	{
  110. 		static char target[PATH_MAX] = "";
  111. 		char *src_basename = static_basename(src);
  113. 		if(snprintf(target, PATH_MAX, "%s/%s", dest, src_basename) < 0)
  114. 		{
  115. 			fprintf(stderr,
  116. 			        "%s: error: Failed joining destination '%s' and source '%s'\n",
  117. 			        argv0,
  118. 			        dest,
  119. 			        src_basename);
  120. 			return -1;
  121. 		}
  123. 		dest_path = target;
  124. 	}
  126. 	int dest_fd = open(dest_path, O_CREAT | O_WRONLY | O_TRUNC, mode);
  127. 	if(dest_fd < 0)
  128. 	{
  129. 		fprintf(stderr,
  130. 		        "%s: error: Failed create-opening file '%s' for writing: %s\n",
  131. 		        argv0,
  132. 		        dest_path,
  133. 		        strerror(errno));
  134. 		return -1;
  135. 	}
  137. 	if(opt_v) fprintf(stderr, "%s: Made file: %s\n", argv0, dest);
  139. 	if(auto_file_copy(src_fd, dest_fd, src_stat.st_size, 0) < 0)
  140. 	{
  141. 		fprintf(stderr,
  142. 		        "%s: error: Failed copying data from '%s' to '%s': %s\n",
  143. 		        argv0,
  144. 		        src,
  145. 		        dest_path,
  146. 		        strerror(errno));
  147. 		return -1;
  148. 	}
  150. 	if(user != (uid_t)-1 || group != (gid_t)-1)
  151. 		if(fchown(dest_fd, user, group) < 0)
  152. 		{
  153. 			fprintf(stderr,
  154. 			        "%s: error: Failed changing ownership of '%s': %s\n",
  155. 			        argv0,
  156. 			        dest_path,
  157. 			        strerror(errno));
  158. 			return -1;
  159. 		}
  161. 	if(preserve_times)
  162. 	{
  163. 		struct timespec src_times[2] = {src_stat.st_atim, src_stat.st_mtim};
  164. 		if(futimens(dest_fd, src_times) != 0)
  165. 		{
  166. 			fprintf(stderr,
  167. 			        "%s: error: Failed setting access/modification times on '%s': %s\n",
  168. 			        argv0,
  169. 			        dest_path,
  170. 			        strerror(errno));
  171. 			return -1;
  172. 		}
  173. 	}
  175. 	if(close(src_fd) < 0)
  176. 	{
  177. 		fprintf(stderr, "%s: error: Failed closing '%s'\n", argv0, src);
  178. 		return -1;
  179. 	}
  181. 	if(close(dest_fd) < 0)
  182. 	{
  183. 		fprintf(stderr, "%s: error: Failed closing '%s'\n", argv0, dest_path);
  184. 		return -1;
  185. 	}
  187. 	return 0;
  188. }
  190. static void
  191. usage(void)
  192. {
  193. 	fprintf(stderr, "\
  194. Usage: install [-CcDpTv] [-g group] [-m mode] [-o owner] source... destination\n\
  195.        install [-CcDpTv] [-g group] [-m mode] [-o owner] -t destination source...\n\
  196.        install -d [-cv] [-g group] [-m mode] [-o owner] directory...\n\
  197. ");
  198. }
  200. int
  201. main(int argc, char *argv[])
  202. {
  203. 	const char *errstr = NULL;
  204. 	bool create_parents = false;
  205. 	bool opt_T = false;
  206. 	char *dest = NULL;
  208. 	mkdir_parents_filemask = umask(0);
  209. 	umask(mkdir_parents_filemask);
  211. #ifdef HAS_GETOPT_LONG
  212. 	// Strictly for GNUisms compatibility so no long-only options
  213. 	// clang-format off
  214. 	static struct option opts[] = {
  215. 		{"compare", no_argument, 0, 'c'},
  216. 		{"directory", no_argument, 0, 'd'},
  217. 		{"group", required_argument, 0, 'g'},
  218. 		{"mode", required_argument, 0, 'm'},
  219. 		{"owner", required_argument, 0, 'o'},
  220. 		{"preserve-timestamps", no_argument, 0, 'p'},
  221. 		{"target-directory", required_argument, 0, 't'},
  222. 		{"no-target-directory", no_argument, 0, 'T'},
  223. 		{"verbose", no_argument, 0, 'v'},
  224. 		{0, 0, 0, 0},
  225. 	};
  226. 	// clang-format on
  228. 	// Need + as first character to get POSIX-style option parsing
  229. 	for(int c = -1; (c = getopt_long(argc, argv, "+:CcDdpTt:g:m:o:v", opts, NULL)) != -1;)
  230. #else
  231. 	for(int c = -1; (c = getopt_nolong(argc, argv, ":CcDdpTt:g:m:o:v")) != -1;)
  232. #endif
  233. 	{
  234. 		switch(c)
  235. 		{
  236. 		case 'C':
  237. 			// ignore, for compatibility
  238. 			break;
  239. 		case 'c':
  240. 			// ignore, modern default behavior
  241. 			break;
  242. 		case 'D':
  243. 			create_parents = true;
  244. 			break;
  245. 		case 'd':
  246. 			create_directories = true;
  247. 			break;
  248. 		case 'p':
  249. 			preserve_times = true;
  250. 			break;
  251. 		case 'g':
  252. 			if(parse_group(optarg, &group) != 0) return 1;
  253. 			break;
  254. 		case 'o':
  255. 			if(parse_group(optarg, &user) != 0) return 1;
  256. 			break;
  257. 		case 'T':
  258. 			opt_T = true;
  259. 			break;
  260. 		case 't':
  261. 			dest = optarg;
  262. 			break;
  263. 		case 'm':
  264. 			mode = new_mode(optarg, 0755, &errstr);
  265. 			if(errstr != NULL)
  266. 			{
  267. 				fprintf(stderr, "install: error: Failed parsing mode '%s': %s\n", optarg, errstr);
  268. 				return 1;
  269. 			}
  270. 			break;
  271. 		case 'v':
  272. 			opt_v = true;
  273. 			mkdir_parents_verbose = true;
  274. 			break;
  275. 		case ':':
  276. 			fprintf(stderr, "install: error: Missing operand for option: '-%c'\n", optopt);
  277. 			usage();
  278. 			return 1;
  279. 		case '?':
  280. 			if(!got_long_opt) fprintf(stderr, "install: error: Unknown option '-%c'\n", optopt);
  281. 			usage();
  282. 			return 1;
  283. 		}
  284. 	}
  286. 	argc -= optind;
  287. 	argv += optind;
  289. 	if(create_directories)
  290. 	{
  291. 		for(int i = 0; i < argc; i++)
  292. 		{
  293. 			char *dest = argv[i];
  295. 			if(mkdir_parents(dest, mode) != 0) return -1;
  297. 			if(opt_v) fprintf(stderr, "%s: Made directory: %s\n", argv0, dest);
  299. 			if(user != (uid_t)-1 || group != (gid_t)-1)
  300. 			{
  301. 				if(chown(dest, user, group) < 0)
  302. 				{
  303. 					fprintf(stderr,
  304. 					        "%s: error: Failed changing ownership of '%s': %s\n",
  305. 					        argv0,
  306. 					        dest,
  307. 					        strerror(errno));
  308. 					return -1;
  309. 				}
  310. 			}
  311. 		}
  313. 		return 0;
  314. 	}
  316. 	if(dest == NULL) dest = argv[--argc];
  317. 	bool multi_src = argc > 1;
  319. 	if(opt_T)
  320. 	{
  321. 		if(argc != 1)
  322. 		{
  323. 			fprintf(stderr,
  324. 			        "%s: error: Option -T passed, expected exactly 1 source operand, got %d\n",
  325. 			        argv0,
  326. 			        argc);
  327. 			return 1;
  328. 		}
  330. 		assert(!multi_src);
  331. 	}
  332. 	else if(argc < 1)
  333. 	{
  334. 		fprintf(stderr, "%s: error: Expected at least 1 source operand\n", argv0);
  335. 		return 1;
  336. 	}
  338. 	if(create_parents)
  339. 	{
  340. 		char *destdir = dest;
  341. 		// Same as in mkdir_parents
  342. 		mode_t parent_mode = (S_IWUSR | S_IXUSR | ~mkdir_parents_filemask) & 0777;
  344. 		if(!multi_src)
  345. 		{
  346. 			char path_dup[PATH_MAX] = "";
  347. 			strncpy(path_dup, dest, PATH_MAX);
  349. 			destdir = dirname(path_dup);
  350. 		}
  352. 		if(mkdir_parents(destdir, parent_mode) != 0) return 1;
  353. 	}
  355. 	for(int i = 0; i < argc; i++)
  356. 	{
  357. 		char *src = argv[i];
  358. 		if(do_install(src, dest, multi_src) < 0) return 1;
  359. 	}
  361. 	return 0;
  362. }