1/* vi: set sw=4 ts=4: */ 2/* 3 * Mini touch implementation for busybox 4 * 5 * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org> 6 * 7 * Licensed under GPLv2 or later, see file LICENSE in this tarball for details. 8 */ 9 10/* BB_AUDIT SUSv3 _NOT_ compliant -- options -a, -m, -r, -t not supported. */ 11/* http://www.opengroup.org/onlinepubs/007904975/utilities/touch.html */ 12 13/* Mar 16, 2003 Manuel Novoa III (mjn3@codepoet.org) 14 * 15 * Previous version called open() and then utime(). While this will be 16 * be necessary to implement -r and -t, it currently only makes things bigger. 17 * Also, exiting on a failure was a bug. All args should be processed. 18 */ 19 20#include "libbb.h" 21 22/* This is a NOFORK applet. Be very careful! */ 23 24int touch_main(int argc, char **argv); 25int touch_main(int argc, char **argv) 26{ 27 int fd; 28 int status = EXIT_SUCCESS; 29 int flags = getopt32(argv, "c"); 30 31 argv += optind; 32 33 if (!*argv) { 34 bb_show_usage(); 35 } 36 37 do { 38 if (utime(*argv, NULL)) { 39 if (errno == ENOENT) { /* no such file */ 40 if (flags) { /* Creation is disabled, so ignore. */ 41 continue; 42 } 43 /* Try to create the file. */ 44 fd = open(*argv, O_RDWR | O_CREAT, 45 S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH 46 ); 47 if ((fd >= 0) && !close(fd)) { 48 continue; 49 } 50 } 51 status = EXIT_FAILURE; 52 bb_perror_msg("%s", *argv); 53 } 54 } while (*++argv); 55 56 return status; 57} 58