API tools faq
paste
Guest User

Untitled

a guest
Jun 20th, 2018
120
0
Never
Add comment
Not a member of Pastebin yet? Sign Up, it unlocks many cool features!
text 6.79 KB | None | 0 0
raw download clone embed print report
  1. /* $NetBSD: cat.c,v 1.47 2008/07/20 00:52:39 lukem Exp $ */
  2.  
  3. /*
  4. * Copyright (c) 1989, 1993
  5. * The Regents of the University of California. All rights reserved.
  6. *
  7. * This code is derived from software contributed to Berkeley by
  8. * Kevin Fall.
  9. *
  10. * Redistribution and use in source and binary forms, with or without
  11. * modification, are permitted provided that the following conditions
  12. * are met:
  13. * 1. Redistributions of source code must retain the above copyright
  14. * notice, this list of conditions and the following disclaimer.
  15. * 2. Redistributions in binary form must reproduce the above copyright
  16. * notice, this list of conditions and the following disclaimer in the
  17. * documentation and/or other materials provided with the distribution.
  18. * 3. Neither the name of the University nor the names of its contributors
  19. * may be used to endorse or promote products derived from this software
  20. * without specific prior written permission.
  21. *
  22. * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  23. * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  24. * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  25. * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  26. * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  27. * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  28. * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  29. * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  30. * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  31. * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  32. * SUCH DAMAGE.
  33. */
  34.  
  35. #if HAVE_NBTOOL_CONFIG_H
  36. #include "nbtool_config.h"
  37. #endif
  38.  
  39. #include <sys/cdefs.h>
  40. #if !defined(lint)
  41. __COPYRIGHT(
  42. "@(#) Copyright (c) 1989, 1993\
  43. The Regents of the University of California. All rights reserved.");
  44. #if 0
  45. static char sccsid[] = "@(#)cat.c 8.2 (Berkeley) 4/27/95";
  46. #else
  47. __RCSID("$NetBSD: cat.c,v 1.47 2008/07/20 00:52:39 lukem Exp $");
  48. #endif
  49. #endif /* not lint */
  50.  
  51. #include <sys/param.h>
  52. #include <sys/stat.h>
  53.  
  54. #include <ctype.h>
  55. #include <err.h>
  56. #include <errno.h>
  57. #include <fcntl.h>
  58. #include <locale.h>
  59. #include <stdio.h>
  60. #include <stdlib.h>
  61. #include <string.h>
  62. #include <unistd.h>
  63.  
  64. int bflag, eflag, fflag, lflag, nflag, sflag, tflag, vflag;
  65. int rval;
  66. const char *filename;
  67.  
  68. int main(int, char *[]);
  69. void cook_args(char *argv[]);
  70. void cook_buf(FILE *);
  71. void raw_args(char *argv[]);
  72. void raw_cat(int);
  73.  
  74. int
  75. main(int argc, char *argv[])
  76. {
  77. int ch;
  78. struct flock stdout_lock;
  79.  
  80. setprogname(argv[0]);
  81. (void)setlocale(LC_ALL, "");
  82.  
  83. while ((ch = getopt(argc, argv, "beflnstuv")) != -1)
  84. switch (ch) {
  85. case 'b':
  86. bflag = nflag = 1; /* -b implies -n */
  87. break;
  88. case 'e':
  89. eflag = vflag = 1; /* -e implies -v */
  90. break;
  91. case 'f':
  92. fflag = 1;
  93. break;
  94. case 'l':
  95. lflag = 1;
  96. break;
  97. case 'n':
  98. nflag = 1;
  99. break;
  100. case 's':
  101. sflag = 1;
  102. break;
  103. case 't':
  104. tflag = vflag = 1; /* -t implies -v */
  105. break;
  106. case 'u':
  107. setbuf(stdout, NULL);
  108. break;
  109. case 'v':
  110. vflag = 1;
  111. break;
  112. default:
  113. case '?':
  114. (void)fprintf(stderr,
  115. "usage: cat [-beflnstuv] [-] [file ...]\n");
  116. exit(EXIT_FAILURE);
  117. /* NOTREACHED */
  118. }
  119. argv += optind;
  120.  
  121. if (lflag) {
  122. stdout_lock.l_len = 0;
  123. stdout_lock.l_start = 0;
  124. stdout_lock.l_type = F_WRLCK;
  125. stdout_lock.l_whence = SEEK_SET;
  126. if (fcntl(STDOUT_FILENO, F_SETLKW, &stdout_lock) == -1)
  127. err(EXIT_FAILURE, "stdout");
  128. }
  129.  
  130. if (bflag || eflag || nflag || sflag || tflag || vflag)
  131. cook_args(argv);
  132. else
  133. raw_args(argv);
  134. if (fclose(stdout))
  135. err(EXIT_FAILURE, "stdout");
  136. return (rval);
  137. }
  138.  
  139. void
  140. cook_args(char **argv)
  141. {
  142. FILE *fp;
  143.  
  144. fp = stdin;
  145. filename = "stdin";
  146. do {
  147. if (*argv) {
  148. if (!strcmp(*argv, "-"))
  149. fp = stdin;
  150. else if ((fp = fopen(*argv,
  151. fflag ? "rf" : "r")) == NULL) {
  152. warn("%s", *argv);
  153. rval = EXIT_FAILURE;
  154. ++argv;
  155. continue;
  156. }
  157. filename = *argv++;
  158. }
  159. cook_buf(fp);
  160. if (fp != stdin)
  161. (void)fclose(fp);
  162. else
  163. clearerr(fp);
  164. } while (*argv);
  165. }
  166.  
  167. void
  168. cook_buf(FILE *fp)
  169. {
  170. int ch, gobble, line, prev;
  171.  
  172. line = gobble = 0;
  173. for (prev = '\n'; (ch = getc(fp)) != EOF; prev = ch) {
  174. if (prev == '\n') {
  175. if (ch == '\n') {
  176. if (sflag) {
  177. if (!gobble && nflag && !bflag)
  178. (void)fprintf(stdout,
  179. "%6d\t\n", ++line);
  180. else if (!gobble && putchar(ch) == EOF)
  181. break;
  182. gobble = 1;
  183. continue;
  184. }
  185. if (nflag) {
  186. if (!bflag) {
  187. (void)fprintf(stdout,
  188. "%6d\t", ++line);
  189. if (ferror(stdout))
  190. break;
  191. } else if (eflag) {
  192. (void)fprintf(stdout,
  193. "%6s\t", "");
  194. if (ferror(stdout))
  195. break;
  196. }
  197. }
  198. } else if (nflag) {
  199. (void)fprintf(stdout, "%6d\t", ++line);
  200. if (ferror(stdout))
  201. break;
  202. }
  203. }
  204. gobble = 0;
  205. if (ch == '\n') {
  206. if (eflag)
  207. if (putchar('$') == EOF)
  208. break;
  209. } else if (ch == '\t') {
  210. if (tflag) {
  211. if (putchar('^') == EOF || putchar('I') == EOF)
  212. break;
  213. continue;
  214. }
  215. } else if (vflag) {
  216. if (!isascii(ch)) {
  217. if (putchar('M') == EOF || putchar('-') == EOF)
  218. break;
  219. ch = toascii(ch);
  220. }
  221. if (iscntrl(ch)) {
  222. if (putchar('^') == EOF ||
  223. putchar(ch == '\177' ? '?' :
  224. ch | 0100) == EOF)
  225. break;
  226. continue;
  227. }
  228. }
  229. if (putchar(ch) == EOF)
  230. break;
  231. }
  232. if (ferror(fp)) {
  233. warn("%s", filename);
  234. rval = EXIT_FAILURE;
  235. clearerr(fp);
  236. }
  237. if (ferror(stdout))
  238. err(EXIT_FAILURE, "stdout");
  239. }
  240.  
  241. void
  242. raw_args(char **argv)
  243. {
  244. int fd;
  245.  
  246. fd = fileno(stdin);
  247. filename = "stdin";
  248. do {
  249. if (*argv) {
  250. if (!strcmp(*argv, "-"))
  251. fd = fileno(stdin);
  252. else if (fflag) {
  253. struct stat st;
  254. fd = open(*argv, O_RDONLY|O_NONBLOCK, 0);
  255. if (fd < 0)
  256. goto skip;
  257.  
  258. if (fstat(fd, &st) == -1) {
  259. close(fd);
  260. goto skip;
  261. }
  262. if (!S_ISREG(st.st_mode)) {
  263. close(fd);
  264. warnx("%s: not a regular file", *argv);
  265. goto skipnomsg;
  266. }
  267. }
  268. else if ((fd = open(*argv, O_RDONLY, 0)) < 0) {
  269. skip:
  270. warn("%s", *argv);
  271. skipnomsg:
  272. rval = EXIT_FAILURE;
  273. ++argv;
  274. continue;
  275. }
  276. filename = *argv++;
  277. }
  278. raw_cat(fd);
  279. if (fd != fileno(stdin))
  280. (void)close(fd);
  281. } while (*argv);
  282. }
  283.  
  284. void
  285. raw_cat(int rfd)
  286. {
  287. static char *buf;
  288. static char fb_buf[BUFSIZ];
  289. static size_t bsize;
  290.  
  291. ssize_t nr, nw, off;
  292. int wfd;
  293.  
  294. wfd = fileno(stdout);
  295. if (buf == NULL) {
  296. struct stat sbuf;
  297.  
  298. if (fstat(wfd, &sbuf) == 0 &&
  299. sbuf.st_blksize > sizeof(fb_buf)) {
  300. bsize = sbuf.st_blksize;
  301. buf = malloc(bsize);
  302. }
  303. if (buf == NULL) {
  304. bsize = sizeof(fb_buf);
  305. buf = fb_buf;
  306. }
  307. }
  308. while ((nr = read(rfd, buf, bsize)) > 0)
  309. for (off = 0; nr; nr -= nw, off += nw)
  310. if ((nw = write(wfd, buf + off, (size_t)nr)) < 0)
  311. err(EXIT_FAILURE, "stdout");
  312. if (nr < 0) {
  313. warn("%s", filename);
  314. rval = EXIT_FAILURE;
  315. }
  316. }
Add Comment
Please, Sign In to add comment
Public Pastes
We use cookies for various purposes including analytics. By continuing to use Pastebin, you agree to our use of cookies as described in the Cookies Policy.  OK, I Understand
Not a member of Pastebin yet?
Sign Up, it unlocks many cool features!