/* $NetBSD: touch.c,v 1.40 2024/02/10 00:19:30 kre Exp $ */ /* * 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 #ifndef lint __COPYRIGHT("@(#) Copyright (c) 1993\ The Regents of the University of California. All rights reserved."); #endif /* not lint */ #ifndef lint #if 0 static char sccsid[] = "@(#)touch.c 8.2 (Berkeley) 4/28/95"; #endif __RCSID("$NetBSD: touch.c,v 1.40 2024/02/10 00:19:30 kre Exp $"); #endif /* not lint */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include static void stime_arg0(const char *, struct timespec *); static void stime_arg1(char *, struct timespec *); static void stime_arg2(const char *, int, struct timespec *); static void stime_file(const char *, struct timespec *, int (const char *, struct stat *)); static int stime_posix(const char *, struct timespec *); static int difftm(const struct tm *, const struct tm *); __dead static void usage(void); struct option touch_longopts[] = { { "date", required_argument, 0, 'd' }, { "reference", required_argument, 0, 'r' }, { NULL, 0, 0, 0 }, }; #define YEAR_BOUNDARY 69 #define LOW_YEAR_CENTURY 2000 /* for 2 digit years < YEAR_BOUNDARY */ #define HIGH_YEAR_CENTURY 1900 /* for 2 digit years >= " */ #define NO_TIME ((time_t)-1) /* time_t might be unsigned */ int main(int argc, char *argv[]) { struct stat sb; struct timespec ts[2]; int aflag, cflag, Dflag, hflag, mflag, ch, fd, len, rval, timeset; char *p; int (*change_file_times)(const char *, const struct timespec *); int (*get_file_status)(const char *, struct stat *); setlocale(LC_ALL, ""); aflag = cflag = Dflag = hflag = mflag = timeset = 0; if (clock_gettime(CLOCK_REALTIME, &ts[0])) err(1, "clock_gettime"); while ((ch = getopt_long(argc, argv, "acDd:fhmR:r:t:", touch_longopts, NULL)) != -1) switch (ch) { case 'a': aflag = 1; break; case 'c': cflag = 1; break; case 'D': Dflag = 1; break; case 'd': timeset = 1; if (!stime_posix(optarg, ts)) stime_arg0(optarg, ts); break; case 'f': break; case 'h': hflag = 1; break; case 'm': mflag = 1; break; case 'R': timeset = 1; stime_file(optarg, ts, lstat); break; case 'r': timeset = 1; stime_file(optarg, ts, stat); break; case 't': timeset = 1; stime_arg1(optarg, ts); break; case '?': default: usage(); } argc -= optind; argv += optind; /* Default is both -a and -m. */ if (aflag == 0 && mflag == 0) aflag = mflag = 1; if (hflag) { cflag = 1; /* Don't create new file */ change_file_times = lutimens; get_file_status = lstat; } else { change_file_times = utimens; get_file_status = stat; } /* * 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. */ if (!timeset && argc > 1) { (void)strtol(argv[0], &p, 10); len = p - argv[0]; if (*p == '\0' && (len == 8 || len == 10)) { timeset = 1; stime_arg2(*argv++, len == 10, ts); } } /* Otherwise use the current time of day. */ if (!timeset) ts[1] = ts[0]; if (*argv == NULL) usage(); for (rval = EXIT_SUCCESS; *argv; ++argv) { /* See if the file exists. */ if ((*get_file_status)(*argv, &sb)) { if (!cflag) { /* Create the file. */ fd = open(*argv, O_WRONLY | O_CREAT, DEFFILEMODE); if (fd == -1 || fstat(fd, &sb) || close(fd)) { rval = EXIT_FAILURE; warn("%s", *argv); continue; } /* If using the current time, we're done. */ if (!timeset) continue; } else continue; } if (!aflag) ts[0] = sb.st_atimespec; if (!mflag) ts[1] = sb.st_mtimespec; if (Dflag && timespeccmp(&ts[0], &sb.st_atimespec, ==) && timespeccmp(&ts[1], &sb.st_mtimespec, ==)) continue; /* Try utimes(2). */ if (!(*change_file_times)(*argv, ts)) continue; /* If the user specified a time, nothing else we can do. */ if (timeset) { rval = EXIT_FAILURE; warn("%s", *argv); } /* * System V and POSIX 1003.1 require that a NULL argument * set the access/modification times to the current time. * The permission checks are different, too, in that the * ability to write the file is sufficient. Take a shot. */ if (!(*change_file_times)(*argv, NULL)) continue; rval = EXIT_FAILURE; warn("%s", *argv); } exit(rval); } #define ATOI2(s) ((s) += 2, ((s)[-2] - '0') * 10 + ((s)[-1] - '0')) static void stime_arg0(const char *arg, struct timespec *tsp) { tsp[1].tv_sec = tsp[0].tv_sec = parsedate(arg, NULL, NULL); if (tsp[0].tv_sec == NO_TIME) errx(EXIT_FAILURE, "Could not parse `%s'", arg); tsp[0].tv_nsec = tsp[1].tv_nsec = 0; } static void stime_arg1(char *arg, struct timespec *tsp) { struct tm *t, tm; time_t tmptime; int yearset; char *p; char *initarg = arg; /* Start with the current time. */ tmptime = tsp[0].tv_sec; if ((t = localtime(&tmptime)) == NULL) err(EXIT_FAILURE, "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) * 100 - TM_YEAR_BASE; yearset = 1; /* FALLTHROUGH */ case 10: /* YYMMDDhhmm */ if (yearset) { t->tm_year += ATOI2(arg); } else { yearset = ATOI2(arg); if (yearset < YEAR_BOUNDARY) t->tm_year = yearset + LOW_YEAR_CENTURY - TM_YEAR_BASE; else t->tm_year = yearset + HIGH_YEAR_CENTURY - TM_YEAR_BASE; } /* FALLTHROUGH */ case 8: /* MMDDhhmm */ t->tm_mon = ATOI2(arg); --t->tm_mon; /* Convert from 01-12 to 00-11 */ /* FALLTHROUGH */ case 6: t->tm_mday = ATOI2(arg); /* FALLTHROUGH */ case 4: t->tm_hour = ATOI2(arg); /* FALLTHROUGH */ case 2: t->tm_min = ATOI2(arg); break; default: goto terr; } t->tm_isdst = -1; /* Figure out DST. */ tm = *t; tsp[0].tv_sec = tsp[1].tv_sec = mktime(t); if (tsp[0].tv_sec == NO_TIME || difftm(t, &tm)) terr: errx(EXIT_FAILURE, "out of range or bad time specification:\n" "\t'%s' should be [[CC]YY]MMDDhhmm[.ss]", initarg); tsp[0].tv_nsec = tsp[1].tv_nsec = 0; } static void stime_arg2(const char *arg, int year, struct timespec *tsp) { struct tm *t, tm; time_t tmptime; /* Start with the current time. */ tmptime = tsp[0].tv_sec; if ((t = localtime(&tmptime)) == NULL) err(EXIT_FAILURE, "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) { year = ATOI2(arg); if (year < YEAR_BOUNDARY) t->tm_year = year + LOW_YEAR_CENTURY - TM_YEAR_BASE; else t->tm_year = year + HIGH_YEAR_CENTURY - TM_YEAR_BASE; } t->tm_sec = 0; t->tm_isdst = -1; /* Figure out DST. */ tm = *t; tsp[0].tv_sec = tsp[1].tv_sec = mktime(t); if (tsp[0].tv_sec == NO_TIME || difftm(t, &tm)) errx(EXIT_FAILURE, "out of range or bad time specification: MMDDhhmm[YY]"); tsp[0].tv_nsec = tsp[1].tv_nsec = 0; } static void stime_file(const char *fname, struct timespec *tsp, int statfunc(const char *, struct stat *)) { struct stat sb; if (statfunc(fname, &sb)) err(1, "%s", fname); tsp[0] = sb.st_atimespec; tsp[1] = sb.st_mtimespec; } static int stime_posix(const char *arg, struct timespec *tsp) { struct tm tm, tms; const char *p; char *ep; int utc = 0; long val; #define isdigch(c) (isdigit((int)((unsigned char)(c)))) if ((p = strchr(arg, '-')) == NULL) return 0; if (p - arg < 4) /* at least 4 year digits required */ return 0; if (!isdigch(arg[0])) /* and the first must be a digit! */ return 0; (void)memset(&tm, 0, sizeof tm); errno = 0; val = strtol(arg, &ep, 10); /* YYYY */ if (val < 0 || val > INT_MAX) return 0; if (*ep != '-') return 0; tm.tm_year = (int)val - 1900; p = ep + 1; if (!isdigch(*p)) return 0; val = strtol(p, &ep, 10); /* MM */ if (val < 1 || val > 12) return 0; if (*ep != '-' || ep != p + 2) return 0; tm.tm_mon = (int)val - 1; p = ep + 1; if (!isdigch(*p)) return 0; val = strtol(p, &ep, 10); /* DD */ if (val < 1 || val > 31) return 0; if ((*ep != 'T' && *ep != ' ') || ep != p + 2) return 0; tm.tm_mday = (int)val; p = ep + 1; if (!isdigch(*p)) return 0; val = strtol(p, &ep, 10); /* hh */ if (val < 0 || val > 23) return 0; if (*ep != ':' || ep != p + 2) return 0; tm.tm_hour = (int)val; p = ep + 1; if (!isdigch(*p)) return 0; val = strtol(p, &ep, 10); /* mm */ if (val < 0 || val > 59) return 0; if (*ep != ':' || ep != p + 2) return 0; tm.tm_min = (int)val; p = ep + 1; if (!isdigch(*p)) return 0; val = strtol(p, &ep, 10); /* ss (or in POSIX, SS) */ if (val < 0 || val > 60) return 0; if ((*ep != '.' && *ep != ',' && *ep != 'Z' && *ep != '\0') || ep != p + 2) return 0; tm.tm_sec = (int)val; if (*ep == ',' || *ep == '.') { double frac; ptrdiff_t fdigs; p = ep + 1; if (!isdigch(*p)) return 0; val = strtol(p, &ep, 10); if (val < 0) return 0; if (ep == p) /* at least 1 digit required */ return 0; if (*ep != 'Z' && *ep != '\0') return 0; if (errno != 0) return 0; fdigs = ep - p; if (fdigs > 15) { /* avoid being absurd */ /* don't want to risk 10^fdigs being INF */ if (val == 0) fdigs = 1; else while (fdigs > 15) { val = (val + 5) / 10; fdigs--; } } frac = pow(10.0, (double)fdigs); tsp[0].tv_nsec = tsp[1].tv_nsec = (long)round(((double)val / frac) * 1000000000.0); } else tsp[0].tv_nsec = tsp[1].tv_nsec = 0; if (*ep == 'Z') { if (ep[1] != '\0') return 0; utc = 1; } if (errno != 0) return 0; tm.tm_isdst = -1; tms = tm; if (utc) tsp[0].tv_sec = tsp[1].tv_sec = timegm(&tm); else tsp[0].tv_sec = tsp[1].tv_sec = mktime(&tm); if ((errno != 0 && tsp[1].tv_sec == NO_TIME) || difftm(&tm, &tms)) return 0; return 1; } /* * Determine whether 2 struct tn's are different * return true (1) if theu are, false (0) otherwise. * * Note that we only consider the fields that are set * for mktime() to use - if mktime() returns them * differently than was set, then there was a problem * with the setting. */ static int difftm(const struct tm *t1, const struct tm *t2) { #define CHK(fld) do { \ if (t1->tm_##fld != t2->tm_##fld) { \ return 1; \ } \ } while(/*CONSTCOND*/0) CHK(year); CHK(mon); CHK(mday); CHK(hour); CHK(min); CHK(sec); return 0; } static void usage(void) { (void)fprintf(stderr, "Usage: %s [-acDfhm] [-d|--date datetime] [-R|-r|--reference file]" " [-t time] file ...\n", getprogname()); exit(EXIT_FAILURE); }