-#include "internal.h"
+/* vi: set sw=4 ts=4: */
+/*
+ * Mini date implementation for busybox
+ *
+ * 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
+ *
+*/
+
#include <stdlib.h>
#include <errno.h>
#include <sys/time.h>
#include <unistd.h>
#include <time.h>
#include <stdio.h>
+#include <string.h>
#include <getopt.h>
+#include "busybox.h"
/* This 'date' command supports only 2 time setting formats,
an RFC 822 complient date output for shell scripting
mail commands */
-const char date_usage[] = "date [-uR] [+FORMAT|+%f] [ [-s|-d] MMDDhhmm[[CC]YY]\n"
-"| [[[[CCYY.]MM.DD-]hh:mm[:ss]]]] ]";
-
-//static const char date_usage[] = "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";
+/* 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 */
-static struct option const long_options[] =
+static struct tm *date_conv_time(struct tm *tm_time, const char *t_string)
{
- {"date", required_argument, NULL, 'd'},
- /* {"rfc-822", no_argument, NULL, 'R'},
- {"set", required_argument, NULL, 's'},
- {"uct", no_argument, NULL, 'u'},
- {"utc", no_argument, NULL, 'u'},
- {"universal", no_argument, NULL, 'u'}, */
- {NULL, 0, NULL, 0}
-};
-
+ int nr;
+ 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));
-/* Input parsing code is always bulky - used heavy duty libc stuff as
- much as possible, missed out a lot of bounds checking */
+ if (nr < 4 || nr > 5) {
+ error_msg_and_die(invalid_date, t_string);
+ }
-/* Default input handling to save suprising some people */
+ /* 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;
-struct tm *
-date_conv_time(struct tm *tm_time, const char *t_string) {
- int nr;
-
- 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(1);
- }
-
- /* 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);
+ return (tm_time);
}
/* 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(1);
+static struct tm *date_conv_ftime(struct tm *tm_time, const char *t_string)
+{
+ struct tm t;
-}
+ /* Parse input and assign appropriately to tm_time */
+
+ if (t=*tm_time,sscanf(t_string, "%d:%d:%d",
+ &t.tm_hour, &t.tm_min, &t.tm_sec) == 3) {
+ /* no adjustments needed */
+ } else if (t=*tm_time,sscanf(t_string, "%d:%d",
+ &t.tm_hour, &t.tm_min) == 2) {
+ /* no adjustments needed */
-void
-date_err(void) {
- fprintf(stderr, "date: only one date argument can be given at a time.\n");
- exit(1);
+
+ } else if (t=*tm_time,sscanf(t_string, "%d.%d-%d:%d:%d",
+ &t.tm_mon,
+ &t.tm_mday,
+ &t.tm_hour,
+ &t.tm_min, &t.tm_sec) == 5) {
+
+ t.tm_mon -= 1; /* Adjust dates from 1-12 to 0-11 */
+
+ } else if (t=*tm_time,sscanf(t_string, "%d.%d-%d:%d",
+ &t.tm_mon,
+ &t.tm_mday,
+ &t.tm_hour, &t.tm_min) == 4) {
+
+ t.tm_mon -= 1; /* Adjust dates from 1-12 to 0-11 */
+
+ } else if (t=*tm_time,sscanf(t_string, "%d.%d.%d-%d:%d:%d",
+ &t.tm_year,
+ &t.tm_mon,
+ &t.tm_mday,
+ &t.tm_hour,
+ &t.tm_min, &t.tm_sec) == 6) {
+
+ t.tm_year -= 1900; /* Adjust years */
+ t.tm_mon -= 1; /* Adjust dates from 1-12 to 0-11 */
+
+ } else if (t=*tm_time,sscanf(t_string, "%d.%d.%d-%d:%d",
+ &t.tm_year,
+ &t.tm_mon,
+ &t.tm_mday,
+ &t.tm_hour, &t.tm_min) == 5) {
+ t.tm_year -= 1900; /* Adjust years */
+ t.tm_mon -= 1; /* Adjust dates from 1-12 to 0-11 */
+
+ } else {
+ error_msg_and_die(invalid_date, t_string);
+ }
+ *tm_time = t;
+ return (tm_time);
}
-int
-date_main(int argc, char * * argv)
-{
- char *date_str = NULL;
- char *date_fmt = NULL;
- char *t_buff;
- int set_time = 0;
- int rfc822 = 0;
- int utc = 0;
- int use_arg = 0;
- int n_args;
- time_t tm;
- struct tm tm_time;
- char optc;
-
- /* Interpret command line args */
-
-
- while ((optc = getopt_long (argc, argv, "d:Rs:u", long_options, NULL))
- != EOF) {
- switch (optc) {
- case 0:
- break;
-
- case 'R':
- rfc822 = 1;
- break;
-
- case 's':
- set_time = 1;
- if(date_str != NULL) date_err();
- date_str = optarg;
- break;
-
- case 'u':
- utc = 1;
- if (putenv ("TZ=UTC0") != 0) {
- fprintf(stderr,"date: memory exhausted\n");
- return(1);
- }
-#if LOCALTIME_CACHE
- tzset ();
-#endif break;
-
- case 'd':
- use_arg = 1;
- if(date_str != NULL) date_err();
- date_str = optarg;
- break;
-
- default:
- fprintf(stderr, "Usage: %s", date_usage);
- break;
- }
- }
-
-
- n_args = argc - optind;
-
- while (n_args--){
- switch(argv[optind][0]) {
- case '+':
- /* Date format strings */
- if(date_fmt != NULL) {
- fprintf(stderr, "date: only one date format can be given.\n");
- return(1);
- }
- date_fmt = &argv[optind][1];
- break;
-
- case '\0':
- break;
-
- default:
- /* Anything left over must be a date string to set the time */
- set_time = 1;
- if(date_str != NULL) date_err();
- date_str = argv[optind];
- break;
- }
- optind++;
- }
-
-
- /* 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(1);
- }
-
- /* if setting time, set it */
- if(set_time) {
- if( stime(&tm) < 0) {
- fprintf(stderr, "date: can't set date.\n");
- exit(1);
- }
- }
- }
-
- /* Display output */
-
- /* 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");
-
- } else if ( *date_fmt == '\0' ) {
- /* Imitate what GNU 'date' does with NO format string! */
- printf ("\n");
- return(0);
- }
-
- /* Handle special conversions */
-
- if( strncmp( date_fmt, "%f", 2) == 0 ) {
- date_fmt = "%Y.%m.%d-%H:%M:%S";
- }
-
- /* Print OUTPUT (after ALL that!) */
- t_buff = malloc(201);
- strftime(t_buff, 200, date_fmt, &tm_time);
- printf("%s\n", t_buff);
-
- return(0);
+int date_main(int argc, char **argv)
+{
+ char *date_str = NULL;
+ char *date_fmt = NULL;
+ char *t_buff;
+ int c;
+ 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 */
+ while ((c = getopt(argc, argv, "Rs:ud:")) != EOF) {
+ switch (c) {
+ case 'R':
+ rfc822 = 1;
+ break;
+ case 's':
+ set_time = 1;
+ if ((date_str != NULL) || ((date_str = optarg) == NULL)) {
+ show_usage();
+ }
+ break;
+ case 'u':
+ utc = 1;
+ if (putenv("TZ=UTC0") != 0)
+ error_msg_and_die(memory_exhausted);
+ break;
+ case 'd':
+ use_arg = 1;
+ if ((date_str != NULL) || ((date_str = optarg) == NULL))
+ show_usage();
+ break;
+ default:
+ show_usage();
+ }
+ }
+
+ if ((date_fmt == NULL) && (optind < argc) && (argv[optind][0] == '+'))
+ date_fmt = &argv[optind][1]; /* Skip over the '+' */
+ else if (date_str == NULL) {
+ set_time = 1;
+ date_str = argv[optind];
+ }
+#if 0
+ else {
+ error_msg("date_str='%s' date_fmt='%s'\n", date_str, date_fmt);
+ show_usage();
+ }
+#endif
+
+ /* 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)
+ error_msg_and_die(invalid_date, date_str);
+ if ( utc ) {
+ if (putenv("TZ=UTC0") != 0)
+ error_msg_and_die(memory_exhausted);
+ }
+
+ /* if setting time, set it */
+ if (set_time) {
+ if (stime(&tm) < 0) {
+ perror_msg("cannot set date");
+ }
+ }
+ }
+
+ /* Display output */
+
+ /* 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");
+
+ } else if (*date_fmt == '\0') {
+ /* Imitate what GNU 'date' does with NO format string! */
+ printf("\n");
+ return EXIT_SUCCESS;
+ }
+
+ /* Handle special conversions */
+
+ if (strncmp(date_fmt, "%f", 2) == 0) {
+ date_fmt = "%Y.%m.%d-%H:%M:%S";
+ }
+
+ /* Print OUTPUT (after ALL that!) */
+ t_buff = xmalloc(201);
+ strftime(t_buff, 200, date_fmt, &tm_time);
+ puts(t_buff);
+
+ return EXIT_SUCCESS;
}
projects / oweals / busybox.git / blobdiff