diff options
Diffstat (limited to 'coreutils/touch.c')
-rw-r--r-- | coreutils/touch.c | 91 |
1 files changed, 91 insertions, 0 deletions
diff --git a/coreutils/touch.c b/coreutils/touch.c new file mode 100644 index 0000000..92f2023 --- /dev/null +++ b/coreutils/touch.c @@ -0,0 +1,91 @@ +/* vi: set sw=4 ts=4: */ +/* + * Mini touch implementation for busybox + * + * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org> + * + * Licensed under GPLv2 or later, see file LICENSE in this tarball for details. + */ + +/* BB_AUDIT SUSv3 _NOT_ compliant -- options -a, -m, -r, -t not supported. */ +/* http://www.opengroup.org/onlinepubs/007904975/utilities/touch.html */ + +/* Mar 16, 2003 Manuel Novoa III (mjn3@codepoet.org) + * + * Previous version called open() and then utime(). While this will be + * be necessary to implement -r and -t, it currently only makes things bigger. + * Also, exiting on a failure was a bug. All args should be processed. + */ + +#include "libbb.h" + +/* This is a NOFORK applet. Be very careful! */ + +/* coreutils implements: + * -a change only the access time + * -c, --no-create + * do not create any files + * -d, --date=STRING + * parse STRING and use it instead of current time + * -f (ignored, BSD compat) + * -m change only the modification time + * -r, --reference=FILE + * use this file's times instead of current time + * -t STAMP + * use [[CC]YY]MMDDhhmm[.ss] instead of current time + * --time=WORD + * change the specified time: WORD is access, atime, or use + */ + +int touch_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; +int touch_main(int argc UNUSED_PARAM, char **argv) +{ +#if ENABLE_DESKTOP + struct utimbuf timebuf; + char *reference_file = NULL; +#else +#define reference_file NULL +#define timebuf (*(struct utimbuf*)NULL) +#endif + int fd; + int status = EXIT_SUCCESS; + int flags = getopt32(argv, "c" USE_DESKTOP("r:") + /*ignored:*/ "fma" + USE_DESKTOP(, &reference_file)); + + flags &= 1; /* only -c bit is left */ + argv += optind; + if (!*argv) { + bb_show_usage(); + } + + if (reference_file) { + struct stat stbuf; + xstat(reference_file, &stbuf); + timebuf.actime = stbuf.st_atime; + timebuf.modtime = stbuf.st_mtime; + } + + do { + if (utime(*argv, reference_file ? &timebuf : NULL)) { + if (errno == ENOENT) { /* no such file */ + if (flags) { /* creation is disabled, so ignore */ + continue; + } + /* Try to create the file. */ + fd = open(*argv, O_RDWR | O_CREAT, + S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH + ); + if ((fd >= 0) && !close(fd)) { + if (reference_file) + utime(*argv, &timebuf); + continue; + } + } + status = EXIT_FAILURE; + bb_simple_perror_msg(*argv); + } + } while (*++argv); + + return status; +} |