+/* vi: set sw=4 ts=4: */
/*
* Mini date implementation for busybox
*
- * Copyright (C) 1999 by Erik Andersen <andersee@debian.org>
+ * by Matthew Grant <grantma@anathoth.gen.nz>
*
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ * iso-format handling added by Robert Griebl <griebl@gmx.de>
+ * bugfixes and cleanup by Bernhard Fischer
*
+ * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
*/
-#include "internal.h"
-#include <stdlib.h>
-#include <errno.h>
-#include <sys/time.h>
-#include <unistd.h>
-#include <time.h>
-#include <stdio.h>
-
+#include "busybox.h"
-/* This 'date' command supports only 2 time setting formats,
+/* This 'date' command supports only 2 time setting formats,
all the GNU strftime stuff (its in libc, lets use it),
- setting time using UTC and displaying int, as well as
- an RFC 822 complient date output for shell scripting
+ setting time using UTC and displaying it, as well as
+ an RFC 2822 compliant date output for shell scripting
mail commands */
-const char date_usage[] = "date [OPTION]... [+FORMAT]\n"
-" or: date [OPTION] [MMDDhhmm[[CC]YY][.ss]]\n"
-"Display the current time in the given FORMAT, or set the system date.\n"
-"\nOptions:\n\t-R\t\toutput RFC-822 compliant date string\n"
-"\t-s\t\tset time described by STRING\n"
-"\t-u\t\tprint or set Coordinated Universal Time\n";
-
-
/* Input parsing code is always bulky - used heavy duty libc stuff as
much as possible, missed out a lot of bounds checking */
-/* Default input handling to save suprising some people */
-
-struct tm *
-date_conv_time(struct tm *tm_time, const char *t_string) {
- int nr;
+/* Default input handling to save surprising some people */
- nr = sscanf(t_string, "%2d%2d%2d%2d%d",
- &(tm_time->tm_mon),
- &(tm_time->tm_mday),
- &(tm_time->tm_hour),
- &(tm_time->tm_min),
- &(tm_time->tm_year));
- if(nr < 4 || nr > 5) {
- fprintf(stderr, "date: invalid date `%s'\n", t_string);
- exit( FALSE);
- }
-
- /* correct for century - minor Y2K problem here? */
- if(tm_time->tm_year >= 1900)
- tm_time->tm_year -= 1900;
- /* adjust date */
- tm_time->tm_mon -= 1;
-
- return(tm_time);
+#define DATE_OPT_RFC2822 0x01
+#define DATE_OPT_SET 0x02
+#define DATE_OPT_UTC 0x04
+#define DATE_OPT_DATE 0x08
+#define DATE_OPT_REFERENCE 0x10
+#define DATE_OPT_TIMESPEC 0x20
+#define DATE_OPT_HINT 0x40
+static void xputenv(char *s)
+{
+ if (putenv(s) != 0)
+ bb_error_msg_and_die(bb_msg_memory_exhausted);
}
-
-/* The new stuff for LRP */
-
-struct tm *
-date_conv_ftime(struct tm *tm_time, const char *t_string) {
- struct tm itm_time, jtm_time, ktm_time, \
- ltm_time, mtm_time, ntm_time;
-
- itm_time = *tm_time;
- jtm_time = *tm_time;
- ktm_time = *tm_time;
- ltm_time = *tm_time;
- mtm_time = *tm_time;
- ntm_time = *tm_time;
-
- /* Parse input and assign appropriately to tm_time */
-
- if(sscanf(t_string, "%d:%d:%d",
- &itm_time.tm_hour,
- &itm_time.tm_min,
- &itm_time.tm_sec) == 3 ) {
-
- *tm_time = itm_time;
- return(tm_time);
-
- } else if (sscanf(t_string, "%d:%d",
- &jtm_time.tm_hour,
- &jtm_time.tm_min) == 2) {
-
- *tm_time = jtm_time;
- return(tm_time);
-
- } else if (sscanf(t_string, "%d.%d-%d:%d:%d",
- &ktm_time.tm_mon,
- &ktm_time.tm_mday,
- &ktm_time.tm_hour,
- &ktm_time.tm_min,
- &ktm_time.tm_sec) == 5) {
-
- ktm_time.tm_mon -= 1; /* Adjust dates from 1-12 to 0-11 */
- *tm_time = ktm_time;
- return(tm_time);
-
- } else if (sscanf(t_string, "%d.%d-%d:%d",
- <m_time.tm_mon,
- <m_time.tm_mday,
- <m_time.tm_hour,
- <m_time.tm_min) == 4) {
-
- ltm_time.tm_mon -= 1; /* Adjust dates from 1-12 to 0-11 */
- *tm_time = ltm_time;
- return(tm_time);
-
- } else if (sscanf(t_string, "%d.%d.%d-%d:%d:%d",
- &mtm_time.tm_year,
- &mtm_time.tm_mon,
- &mtm_time.tm_mday,
- &mtm_time.tm_hour,
- &mtm_time.tm_min,
- &mtm_time.tm_sec) == 6) {
-
- mtm_time.tm_year -= 1900; /* Adjust years */
- mtm_time.tm_mon -= 1; /* Adjust dates from 1-12 to 0-11 */
- *tm_time = mtm_time;
- return(tm_time);
-
- } else if (sscanf(t_string, "%d.%d.%d-%d:%d",
- &ntm_time.tm_year,
- &ntm_time.tm_mon,
- &ntm_time.tm_mday,
- &ntm_time.tm_hour,
- &ntm_time.tm_min) == 5) {
- ntm_time.tm_year -= 1900; /* Adjust years */
- ntm_time.tm_mon -= 1; /* Adjust dates from 1-12 to 0-11 */
- *tm_time = ntm_time;
- return(tm_time);
-
- }
-
- fprintf(stderr, "date: invalid date `%s'\n", t_string);
-
- exit( FALSE);
-
+static void maybe_set_utc(int opt)
+{
+ if (opt & DATE_OPT_UTC)
+ xputenv("TZ=UTC0");
}
-
-int
-date_main(int argc, char * * argv)
+int date_main(int argc, char **argv)
{
- char *date_str = NULL;
- char *date_fmt = NULL;
- char *t_buff;
- int i;
- int set_time = 0;
- int rfc822 = 0;
- int utc = 0;
- int use_arg = 0;
- time_t tm;
- struct tm tm_time;
-
- /* Interpret command line args */
- i = --argc;
- argv++;
- while (i > 0 && **argv) {
- if (**argv == '-') {
- while (i>0 && *++(*argv)) switch (**argv) {
- case 'R':
- rfc822 = 1;
- break;
- case 's':
- set_time = 1;
- if(date_str != NULL) usage ( date_usage);
- date_str = optarg;
- break;
- case 'u':
- utc = 1;
- if (putenv ("TZ=UTC0") != 0) {
- fprintf(stderr,"date: memory exhausted\n");
- exit( FALSE);
+ time_t tm;
+ struct tm tm_time;
+ unsigned opt;
+ int ifmt = -1;
+ char *date_str = NULL;
+ char *date_fmt = NULL;
+ char *filename = NULL;
+ char *isofmt_arg;
+ char *hintfmt_arg;
+
+ opt_complementary = "?:d--s:s--d"
+ USE_FEATURE_DATE_ISOFMT(":R--I:I--R");
+ opt = getopt32(argc, argv, "Rs:ud:r:"
+ USE_FEATURE_DATE_ISOFMT("I::D:"),
+ &date_str, &date_str, &filename
+ USE_FEATURE_DATE_ISOFMT(, &isofmt_arg, &hintfmt_arg));
+ maybe_set_utc(opt);
+
+ if (ENABLE_FEATURE_DATE_ISOFMT && (opt & DATE_OPT_TIMESPEC)) {
+ if (!isofmt_arg) {
+ ifmt = 0; /* default is date */
+ } else {
+ const char * const isoformats[] =
+ {"date", "hours", "minutes", "seconds"};
+
+ for (ifmt = 0; ifmt < 4; ifmt++)
+ if (!strcmp(isofmt_arg, isoformats[ifmt])) {
+ break;
+ }
+ if (ifmt == 4) /* parse error */
+ bb_show_usage();
}
- /* Look ma, no break. Don't fix it either. */
- case 'd':
- use_arg = 1;
- if(date_str != NULL) usage ( date_usage);
- date_str = optarg;
- break;
- case '-':
- usage ( date_usage);
- }
- } else {
- if ( (date_fmt == NULL) && (strcmp(*argv, "+")==0) )
- date_fmt=*argv;
- else if (date_str == NULL) {
- set_time = 1;
- date_str=*argv;
- } else {
- usage ( date_usage);
- }
}
- i--;
- argv++;
- }
-
-
- /* Now we have parsed all the information except the date format
- which depends on whether the clock is being set or read */
-
- time(&tm);
- memcpy(&tm_time, localtime(&tm), sizeof(tm_time));
- /* Zero out fields - take her back to midnight!*/
- if(date_str != NULL) {
- tm_time.tm_sec = 0;
- tm_time.tm_min = 0;
- tm_time.tm_hour = 0;
- }
-
- /* Process any date input to UNIX time since 1 Jan 1970 */
- if(date_str != NULL) {
-
- if(strchr(date_str, ':') != NULL) {
- date_conv_ftime(&tm_time, date_str);
- } else {
- date_conv_time(&tm_time, date_str);
- }
- /* Correct any day of week and day of year etc fields */
- tm = mktime(&tm_time);
- if (tm < 0 ) {
- fprintf(stderr, "date: invalid date `%s'\n", date_str);
- exit( FALSE);
- }
+ /* XXX, date_fmt == NULL from this always */
+ if ((date_fmt == NULL) && (optind < argc) && (argv[optind][0] == '+')) {
+ date_fmt = &argv[optind][1]; /* Skip over the '+' */
+ } else if (date_str == NULL) {
+ opt |= DATE_OPT_SET;
+ date_str = argv[optind];
+ }
- /* if setting time, set it */
- if(set_time) {
- if( stime(&tm) < 0) {
- fprintf(stderr, "date: can't set date.\n");
- exit( FALSE);
- }
- }
- }
-
- /* Display output */
+ /* Now we have parsed all the information except the date format
+ which depends on whether the clock is being set or read */
+
+ if (filename) {
+ struct stat statbuf;
+ xstat(filename, &statbuf);
+ tm = statbuf.st_mtime;
+ } else
+ time(&tm);
+ memcpy(&tm_time, localtime(&tm), sizeof(tm_time));
+ /* Zero out fields - take her back to midnight! */
+ if (date_str != NULL) {
+ tm_time.tm_sec = 0;
+ tm_time.tm_min = 0;
+ tm_time.tm_hour = 0;
+
+ /* Process any date input to UNIX time since 1 Jan 1970 */
+ if (ENABLE_FEATURE_DATE_ISOFMT && (opt & DATE_OPT_HINT)) {
+ strptime(date_str, hintfmt_arg, &tm_time);
+ } else if (strchr(date_str, ':') != NULL) {
+ /* Parse input and assign appropriately to tm_time */
+
+ if (sscanf(date_str, "%d:%d:%d", &tm_time.tm_hour, &tm_time.tm_min,
+ &tm_time.tm_sec) == 3) {
+ /* no adjustments needed */
+ } else if (sscanf(date_str, "%d:%d", &tm_time.tm_hour,
+ &tm_time.tm_min) == 2) {
+ /* no adjustments needed */
+ } else if (sscanf(date_str, "%d.%d-%d:%d:%d", &tm_time.tm_mon,
+ &tm_time.tm_mday, &tm_time.tm_hour,
+ &tm_time.tm_min, &tm_time.tm_sec) == 5) {
+ /* Adjust dates from 1-12 to 0-11 */
+ tm_time.tm_mon -= 1;
+ } else if (sscanf(date_str, "%d.%d-%d:%d", &tm_time.tm_mon,
+ &tm_time.tm_mday,
+ &tm_time.tm_hour, &tm_time.tm_min) == 4) {
+ /* Adjust dates from 1-12 to 0-11 */
+ tm_time.tm_mon -= 1;
+ } else if (sscanf(date_str, "%d.%d.%d-%d:%d:%d", &tm_time.tm_year,
+ &tm_time.tm_mon, &tm_time.tm_mday,
+ &tm_time.tm_hour, &tm_time.tm_min,
+ &tm_time.tm_sec) == 6) {
+ tm_time.tm_year -= 1900; /* Adjust years */
+ tm_time.tm_mon -= 1; /* Adjust dates from 1-12 to 0-11 */
+ } else if (sscanf(date_str, "%d.%d.%d-%d:%d", &tm_time.tm_year,
+ &tm_time.tm_mon, &tm_time.tm_mday,
+ &tm_time.tm_hour, &tm_time.tm_min) == 5) {
+ tm_time.tm_year -= 1900; /* Adjust years */
+ tm_time.tm_mon -= 1; /* Adjust dates from 1-12 to 0-11 */
+ } else {
+ bb_error_msg_and_die(bb_msg_invalid_date, date_str);
+ }
+ } else {
+ int nr;
+ char *cp;
+
+ nr = sscanf(date_str, "%2d%2d%2d%2d%d", &tm_time.tm_mon,
+ &tm_time.tm_mday, &tm_time.tm_hour, &tm_time.tm_min,
+ &tm_time.tm_year);
+
+ if (nr < 4 || nr > 5) {
+ bb_error_msg_and_die(bb_msg_invalid_date, date_str);
+ }
+
+ cp = strchr(date_str, '.');
+ if (cp) {
+ nr = sscanf(cp + 1, "%2d", &tm_time.tm_sec);
+ if (nr != 1) {
+ bb_error_msg_and_die(bb_msg_invalid_date, date_str);
+ }
+ }
+
+ /* correct for century - minor Y2K problem here? */
+ if (tm_time.tm_year >= 1900) {
+ tm_time.tm_year -= 1900;
+ }
+ /* adjust date */
+ tm_time.tm_mon -= 1;
+ }
- /* Deal with format string */
- if(date_fmt == NULL) {
- date_fmt = (rfc822
- ? (utc
- ? "%a, %_d %b %Y %H:%M:%S GMT"
- : "%a, %_d %b %Y %H:%M:%S %z")
- : "%a %b %e %H:%M:%S %Z %Y");
+ /* Correct any day of week and day of year etc. fields */
+ tm_time.tm_isdst = -1; /* Be sure to recheck dst. */
+ tm = mktime(&tm_time);
+ if (tm < 0) {
+ bb_error_msg_and_die(bb_msg_invalid_date, date_str);
+ }
+ maybe_set_utc(opt);
- } else if ( *date_fmt == '\0' ) {
- /* Imitate what GNU 'date' does with NO format string! */
- printf ("\n");
- exit( TRUE);
- }
+ /* if setting time, set it */
+ if ((opt & DATE_OPT_SET) && stime(&tm) < 0) {
+ bb_perror_msg("cannot set date");
+ }
+ }
- /* Handle special conversions */
+ /* Display output */
+
+ /* Deal with format string */
+
+ if (date_fmt == NULL) {
+ int i;
+ date_fmt = xzalloc(32);
+ if (ENABLE_FEATURE_DATE_ISOFMT && ifmt >= 0) {
+ strcpy(date_fmt, "%Y-%m-%d");
+ if (ifmt > 0) {
+ i = 8;
+ date_fmt[i++] = 'T';
+ date_fmt[i++] = '%';
+ date_fmt[i++] = 'H';
+ if (ifmt > 1) {
+ date_fmt[i++] = ':';
+ date_fmt[i++] = '%';
+ date_fmt[i++] = 'M';
+ }
+ if (ifmt > 2) {
+ date_fmt[i++] = ':';
+ date_fmt[i++] = '%';
+ date_fmt[i++] = 'S';
+ }
+format_utc:
+ date_fmt[i++] = '%';
+ date_fmt[i] = (opt & DATE_OPT_UTC) ? 'Z' : 'z';
+ }
+ } else if (opt & DATE_OPT_RFC2822) {
+ /* Undo busybox.c for date -R */
+ setlocale(LC_TIME, "C");
+ strcpy(date_fmt, "%a, %d %b %Y %H:%M:%S ");
+ i = 22;
+ goto format_utc;
+ } else /* default case */
+ date_fmt = "%a %b %e %H:%M:%S %Z %Y";
+ }
- if( strncmp( date_fmt, "%f", 2) == 0 ) {
- date_fmt = "%Y.%m.%d-%H:%M:%S";
- }
+ if (*date_fmt == '\0') {
+ /* With no format string, just print a blank line */
+ *bb_common_bufsiz1 = 0;
+ } else {
+ /* Handle special conversions */
- /* Print OUTPUT (after ALL that!) */
- t_buff = malloc(201);
- strftime(t_buff, 200, date_fmt, &tm_time);
- printf("%s\n", t_buff);
+ if (strncmp(date_fmt, "%f", 2) == 0) {
+ date_fmt = "%Y.%m.%d-%H:%M:%S";
+ }
- exit( TRUE);
+ /* Generate output string */
+ strftime(bb_common_bufsiz1, 200, date_fmt, &tm_time);
+ }
+ puts(bb_common_bufsiz1);
+ return EXIT_SUCCESS;
}
-
projects / oweals / busybox.git / blobdiff