306 lines
6.8 KiB
C
306 lines
6.8 KiB
C
#include "internal.h"
|
|
#include <stdlib.h>
|
|
#include <errno.h>
|
|
#include <sys/time.h>
|
|
#include <unistd.h>
|
|
#include <time.h>
|
|
#include <stdio.h>
|
|
#include <getopt.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 */
|
|
|
|
const char date_usage[] = "date [-uR] [+FORMAT|+%f] [ [-s|-d] MMDDhhmm[[CC]YY]\n | [[[[CCYY.]MM.DD-]hh:mm[:ss]]]] ]";
|
|
|
|
static struct option const long_options[] =
|
|
{
|
|
{"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}
|
|
};
|
|
|
|
|
|
|
|
/* 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;
|
|
|
|
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);
|
|
|
|
}
|
|
|
|
|
|
/* 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);
|
|
|
|
}
|
|
|
|
|
|
void
|
|
date_err(void) {
|
|
fprintf(stderr, "date: only one date argument can be given at a time.\n");
|
|
exit(1);
|
|
}
|
|
|
|
int
|
|
date_main(struct FileInfo * i, 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:
|
|
usage(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);
|
|
|
|
}
|