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-rw-r--r--usr.bin/touch/touch.c407
1 files changed, 407 insertions, 0 deletions
diff --git a/usr.bin/touch/touch.c b/usr.bin/touch/touch.c
new file mode 100644
index 000000000000..70257e320a60
--- /dev/null
+++ b/usr.bin/touch/touch.c
@@ -0,0 +1,407 @@
+/*-
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
+ * Copyright (c) 1993
+ * The Regents of the University of California. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the University nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <sys/time.h>
+
+#include <ctype.h>
+#include <err.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <libgen.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <time.h>
+#include <unistd.h>
+
+static void stime_arg1(const char *, struct timespec *);
+static void stime_arg2(const char *, int, struct timespec *);
+static void stime_darg(const char *, struct timespec *);
+static void stime_file(const char *, struct timespec *);
+static int timeoffset(const char *);
+static void usage(const char *);
+
+int
+main(int argc, char *argv[])
+{
+ struct stat sb;
+ struct timespec ts[2];
+ int atflag;
+ int Aflag, aflag, cflag, mflag, ch, fd, len, rval, timeset;
+ char *p;
+ char *myname;
+
+ myname = basename(argv[0]);
+ Aflag = aflag = cflag = mflag = timeset = 0;
+ atflag = 0;
+ ts[0].tv_sec = ts[1].tv_sec = 0;
+ ts[0].tv_nsec = ts[1].tv_nsec = UTIME_NOW;
+
+ while ((ch = getopt(argc, argv, "A:acd:fhmr:t:")) != -1)
+ switch(ch) {
+ case 'A':
+ Aflag = timeoffset(optarg);
+ break;
+ case 'a':
+ aflag = 1;
+ break;
+ case 'c':
+ cflag = 1;
+ break;
+ case 'd':
+ timeset = 1;
+ stime_darg(optarg, ts);
+ break;
+ case 'f':
+ /* No-op for compatibility. */
+ break;
+ case 'h':
+ cflag = 1;
+ atflag = AT_SYMLINK_NOFOLLOW;
+ break;
+ case 'm':
+ mflag = 1;
+ break;
+ case 'r':
+ timeset = 1;
+ stime_file(optarg, ts);
+ break;
+ case 't':
+ timeset = 1;
+ stime_arg1(optarg, ts);
+ break;
+ default:
+ usage(myname);
+ }
+ argc -= optind;
+ argv += optind;
+
+ if (aflag == 0 && mflag == 0)
+ aflag = mflag = 1;
+
+ if (timeset) {
+ if (Aflag) {
+ /*
+ * We're setting the time to an offset from a specified
+ * time. God knows why, but it means that we can set
+ * that time once and for all here.
+ */
+ if (aflag)
+ ts[0].tv_sec += Aflag;
+ if (mflag)
+ ts[1].tv_sec += Aflag;
+ Aflag = 0; /* done our job */
+ }
+ } else {
+ /*
+ * If no -r or -t flag, at least two operands, the first of
+ * which is an 8 or 10 digit number, use the obsolete time
+ * specification, otherwise use the current time.
+ */
+ if (argc > 1) {
+ strtol(argv[0], &p, 10);
+ len = p - argv[0];
+ if (*p == '\0' && (len == 8 || len == 10)) {
+ timeset = 1;
+ stime_arg2(*argv++, len == 10, ts);
+ }
+ }
+ /* Both times default to the same. */
+ ts[1] = ts[0];
+ }
+
+ if (!aflag)
+ ts[0].tv_nsec = UTIME_OMIT;
+ if (!mflag)
+ ts[1].tv_nsec = UTIME_OMIT;
+
+ if (*argv == NULL)
+ usage(myname);
+
+ if (Aflag)
+ cflag = 1;
+
+ for (rval = 0; *argv; ++argv) {
+ /* See if the file exists. */
+ if (fstatat(AT_FDCWD, *argv, &sb, atflag) != 0) {
+ if (errno != ENOENT) {
+ rval = 1;
+ warn("%s", *argv);
+ continue;
+ }
+ if (!cflag) {
+ /* Create the file. */
+ fd = open(*argv,
+ O_WRONLY | O_CREAT, DEFFILEMODE);
+ if (fd == -1) {
+ rval = 1;
+ warn("%s", *argv);
+ continue;
+ }
+ if (fstat(fd, &sb) < 0) {
+ warn("%s", *argv);
+ rval = 1;
+ }
+ if (close(fd) < 0) {
+ warn("%s", *argv);
+ rval = 1;
+ }
+
+ /* If using the current time, we're done. */
+ if (!timeset)
+ continue;
+ } else
+ continue;
+ }
+
+ /*
+ * We're adjusting the times based on the file times, not a
+ * specified time (that gets handled above).
+ */
+ if (Aflag) {
+ if (aflag) {
+ ts[0] = sb.st_atim;
+ ts[0].tv_sec += Aflag;
+ }
+ if (mflag) {
+ ts[1] = sb.st_mtim;
+ ts[1].tv_sec += Aflag;
+ }
+ }
+
+ if (!utimensat(AT_FDCWD, *argv, ts, atflag))
+ continue;
+
+ rval = 1;
+ warn("%s", *argv);
+ }
+ exit(rval);
+}
+
+#define ATOI2(ar) ((ar)[0] - '0') * 10 + ((ar)[1] - '0'); (ar) += 2;
+
+static void
+stime_arg1(const char *arg, struct timespec *tvp)
+{
+ time_t now;
+ struct tm *t;
+ int yearset;
+ char *p;
+
+ now = time(NULL);
+ if ((t = localtime(&now)) == NULL)
+ err(1, "localtime");
+ /* [[CC]YY]MMDDhhmm[.SS] */
+ if ((p = strchr(arg, '.')) == NULL)
+ t->tm_sec = 0; /* Seconds defaults to 0. */
+ else {
+ if (strlen(p + 1) != 2)
+ goto terr;
+ *p++ = '\0';
+ t->tm_sec = ATOI2(p);
+ }
+
+ yearset = 0;
+ switch (strlen(arg)) {
+ case 12: /* CCYYMMDDhhmm */
+ t->tm_year = ATOI2(arg);
+ t->tm_year *= 100;
+ yearset = 1;
+ /* FALLTHROUGH */
+ case 10: /* YYMMDDhhmm */
+ if (yearset) {
+ yearset = ATOI2(arg);
+ t->tm_year += yearset;
+ } else {
+ yearset = ATOI2(arg);
+ if (yearset < 69)
+ t->tm_year = yearset + 2000;
+ else
+ t->tm_year = yearset + 1900;
+ }
+ t->tm_year -= 1900; /* Convert to UNIX time. */
+ /* FALLTHROUGH */
+ case 8: /* MMDDhhmm */
+ t->tm_mon = ATOI2(arg);
+ --t->tm_mon; /* Convert from 01-12 to 00-11 */
+ t->tm_mday = ATOI2(arg);
+ t->tm_hour = ATOI2(arg);
+ t->tm_min = ATOI2(arg);
+ break;
+ default:
+ goto terr;
+ }
+
+ t->tm_isdst = -1; /* Figure out DST. */
+ t->tm_yday = -1;
+ tvp[0].tv_sec = tvp[1].tv_sec = mktime(t);
+ if (t->tm_yday == -1)
+ goto terr;
+
+ tvp[0].tv_nsec = tvp[1].tv_nsec = 0;
+ return;
+
+terr:
+ errx(1, "out of range or illegal time specification: "
+ "[[CC]YY]MMDDhhmm[.SS]");
+}
+
+static void
+stime_arg2(const char *arg, int year, struct timespec *tvp)
+{
+ time_t now;
+ struct tm *t;
+
+ now = time(NULL);
+ if ((t = localtime(&now)) == NULL)
+ err(1, "localtime");
+
+ t->tm_mon = ATOI2(arg); /* MMDDhhmm[yy] */
+ --t->tm_mon; /* Convert from 01-12 to 00-11 */
+ t->tm_mday = ATOI2(arg);
+ t->tm_hour = ATOI2(arg);
+ t->tm_min = ATOI2(arg);
+ if (year) {
+ t->tm_year = ATOI2(arg);
+ if (t->tm_year < 39) /* support 2000-2038 not 1902-1969 */
+ t->tm_year += 100;
+ }
+
+ t->tm_isdst = -1; /* Figure out DST. */
+ t->tm_yday = -1;
+ tvp[0].tv_sec = tvp[1].tv_sec = mktime(t);
+ if (t->tm_yday == -1)
+ errx(1, "out of range or illegal time specification: "
+ "MMDDhhmm[yy]");
+
+ tvp[0].tv_nsec = tvp[1].tv_nsec = 0;
+}
+
+static void
+stime_darg(const char *arg, struct timespec *tvp)
+{
+ struct tm t = { .tm_sec = 0 };
+ const char *fmt, *colon;
+ char *p;
+ int val, isutc = 0;
+
+ tvp[0].tv_nsec = 0;
+ t.tm_isdst = -1;
+ colon = strchr(arg, ':');
+ if (colon == NULL || strchr(colon + 1, ':') == NULL)
+ goto bad;
+ fmt = strchr(arg, 'T') != NULL ? "%Y-%m-%dT%H:%M:%S" :
+ "%Y-%m-%d %H:%M:%S";
+ p = strptime(arg, fmt, &t);
+ if (p == NULL)
+ goto bad;
+ /* POSIX: must have at least one digit after dot */
+ if ((*p == '.' || *p == ',') && isdigit((unsigned char)p[1])) {
+ p++;
+ val = 100000000;
+ while (isdigit((unsigned char)*p)) {
+ tvp[0].tv_nsec += val * (*p - '0');
+ p++;
+ val /= 10;
+ }
+ }
+ if (*p == 'Z') {
+ isutc = 1;
+ p++;
+ }
+ if (*p != '\0')
+ goto bad;
+
+ t.tm_yday = -1;
+ tvp[0].tv_sec = isutc ? timegm(&t) : mktime(&t);
+ if (t.tm_yday == -1)
+ goto bad;
+
+ tvp[1] = tvp[0];
+ return;
+
+bad:
+ errx(1, "out of range or illegal time specification: "
+ "YYYY-MM-DDThh:mm:SS[.frac][tz]");
+}
+
+/* Calculate a time offset in seconds, given an arg of the format [-]HHMMSS. */
+int
+timeoffset(const char *arg)
+{
+ int offset;
+ int isneg;
+
+ offset = 0;
+ isneg = *arg == '-';
+ if (isneg)
+ arg++;
+ switch (strlen(arg)) {
+ default: /* invalid */
+ errx(1, "Invalid offset spec, must be [-][[HH]MM]SS");
+
+ case 6: /* HHMMSS */
+ offset = ATOI2(arg);
+ /* FALLTHROUGH */
+ case 4: /* MMSS */
+ offset = offset * 60 + ATOI2(arg);
+ /* FALLTHROUGH */
+ case 2: /* SS */
+ offset = offset * 60 + ATOI2(arg);
+ }
+ if (isneg)
+ return (-offset);
+ else
+ return (offset);
+}
+
+static void
+stime_file(const char *fname, struct timespec *tsp)
+{
+ struct stat sb;
+
+ if (stat(fname, &sb))
+ err(1, "%s", fname);
+ tsp[0] = sb.st_atim;
+ tsp[1] = sb.st_mtim;
+}
+
+static void
+usage(const char *myname)
+{
+ fprintf(stderr, "usage: %s [-A [-][[hh]mm]SS] [-achm] [-r file] "
+ "[-t [[CC]YY]MMDDhhmm[.SS]]\n"
+ " [-d YYYY-MM-DDThh:mm:SS[.frac][tz]] "
+ "file ...\n", myname);
+ exit(1);
+}
generated by cgit v1.2.3 (git 2.25.1) at 2025-10-06 07:07:59 +0000