1 files changed, 292 insertions, 0 deletions

diff --git a/busybox/coreutils/date.c b/busybox/coreutils/date.c
new file mode 100644
index 000000000..3608df69f
--- /dev/null
+++ b/busybox/coreutils/date.c
@@ -0,0 +1,292 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * Mini date implementation for busybox
+ *
+ * by Matthew Grant <grantma@anathoth.gen.nz>
+ *
+ * iso-format handling added by Robert Griebl <griebl@gmx.de>
+ *
+ * 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,
+   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
+   mail commands */
+
+/* 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 surprising some people */
+
+static struct tm *date_conv_time(struct tm *tm_time, const char *t_string)
+{
+        int nr;
+        char *cp;
+
+        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) {
+                bb_error_msg_and_die(bb_msg_invalid_date, t_string);
+        }
+
+        cp = strchr(t_string, '.');
+        if (cp) {
+                nr = sscanf(cp + 1, "%2d", &(tm_time->tm_sec));
+                if (nr != 1) {
+                        bb_error_msg_and_die(bb_msg_invalid_date, t_string);
+                }
+        }
+
+        /* 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);
+
+}
+
+
+/* The new stuff for LRP */
+
+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 */
+        } 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) {
+                /* Adjust dates from 1-12 to 0-11 */
+                t.tm_mon -= 1;
+        } 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) {
+                /* Adjust dates from 1-12 to 0-11 */
+                t.tm_mon -= 1;
+        } 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 {
+                bb_error_msg_and_die(bb_msg_invalid_date, t_string);
+        }
+        *tm_time = t;
+        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
+#ifdef CONFIG_FEATURE_DATE_ISOFMT
+# define DATE_OPT_TIMESPEC      0x20
+#endif
+
+int date_main(int argc, char **argv)
+{
+        char *date_str = NULL;
+        char *date_fmt = NULL;
+        char *t_buff;
+        int set_time;
+        int utc;
+        int use_arg = 0;
+        time_t tm;
+        unsigned long opt;
+        struct tm tm_time;
+        char *filename = NULL;
+
+#ifdef CONFIG_FEATURE_DATE_ISOFMT
+        int ifmt = 0;
+        char *isofmt_arg;
+
+# define GETOPT_ISOFMT  "I::"
+#else
+# define GETOPT_ISOFMT
+#endif
+        bb_opt_complementaly = "d~ds:s~ds";
+        opt = bb_getopt_ulflags(argc, argv, "Rs:ud:r:" GETOPT_ISOFMT,
+                                        &date_str, &date_str, &filename
+#ifdef CONFIG_FEATURE_DATE_ISOFMT
+                                        , &isofmt_arg
+#endif
+                                        );
+        set_time = opt & DATE_OPT_SET;
+        utc = opt & DATE_OPT_UTC;
+        if ((utc) && (putenv("TZ=UTC0") != 0)) {
+                bb_error_msg_and_die(bb_msg_memory_exhausted);
+        }
+        use_arg = opt & DATE_OPT_DATE;
+        if(opt & 0x80000000UL)
+                bb_show_usage();
+#ifdef CONFIG_FEATURE_DATE_ISOFMT
+        if(opt & DATE_OPT_TIMESPEC) {
+                if (!isofmt_arg) {
+                        ifmt = 1;
+                } else {
+                        int ifmt_len = bb_strlen(isofmt_arg);
+
+                        if ((ifmt_len <= 4)
+                                && (strncmp(isofmt_arg, "date", ifmt_len) == 0)) {
+                                ifmt = 1;
+                        } else if ((ifmt_len <= 5)
+                                   && (strncmp(isofmt_arg, "hours", ifmt_len) == 0)) {
+                                ifmt = 2;
+                        } else if ((ifmt_len <= 7)
+                                   && (strncmp(isofmt_arg, "minutes", ifmt_len) == 0)) {
+                                ifmt = 3;
+                        } else if ((ifmt_len <= 7)
+                                   && (strncmp(isofmt_arg, "seconds", ifmt_len) == 0)) {
+                                ifmt = 4;
+                        }
+                }
+                if (!ifmt) {
+                        bb_show_usage();
+                }
+        }
+#endif
+
+        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];
+        }
+
+        /* 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;
+                if(stat(filename,&statbuf))
+                        bb_perror_msg_and_die("File '%s' not found.\n",filename);
+                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 (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_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);
+                }
+                if (utc && (putenv("TZ=UTC0") != 0)) {
+                        bb_error_msg_and_die(bb_msg_memory_exhausted);
+                }
+
+                /* if setting time, set it */
+                if (set_time && (stime(&tm) < 0)) {
+                        bb_perror_msg("cannot set date");
+                }
+        }
+
+        /* Display output */
+
+        /* Deal with format string */
+        if (date_fmt == NULL) {
+#ifdef CONFIG_FEATURE_DATE_ISOFMT
+                switch (ifmt) {
+                case 4:
+                        date_fmt = utc ? "%Y-%m-%dT%H:%M:%SZ" : "%Y-%m-%dT%H:%M:%S%z";
+                        break;
+                case 3:
+                        date_fmt = utc ? "%Y-%m-%dT%H:%MZ" : "%Y-%m-%dT%H:%M%z";
+                        break;
+                case 2:
+                        date_fmt = utc ? "%Y-%m-%dT%HZ" : "%Y-%m-%dT%H%z";
+                        break;
+                case 1:
+                        date_fmt = "%Y-%m-%d";
+                        break;
+                case 0:
+                default:
+#endif
+                        date_fmt = (opt & DATE_OPT_RFC2822 ?
+                                        (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");
+
+#ifdef CONFIG_FEATURE_DATE_ISOFMT
+                        break;
+                }
+#endif
+        } 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;
+}