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Usenet 1994 October
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usenetsourcesnewsgroupsinfomagicoctober1994disk2.iso
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unix
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volume4
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settz
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tzdump.c
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C/C++ Source or Header
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1986-11-30
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3KB
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134 lines
#
#include "stdio.h"
#ifdef OBJECTID
static char sccsid[] = "@(#)tzdump.c 2.1";
#endif
#include "time.h"
#include "tzfile.h"
#ifndef alloc_t
#define alloc_t unsigned
#endif
#ifndef TRUE
#define TRUE 1
#define FALSE 0
#endif
extern char * asctime();
extern char * calloc();
extern struct tm * gmtime();
extern char * newctime();
extern int optind;
extern char * sprintf();
extern long time();
extern char * tz_abbr;
static int longest;
main(argc, argv)
int argc;
char * argv[];
{
register FILE * fp;
register long * tp;
register int i, j, c;
register int vflag;
long now;
struct tzhead h;
char buf[BUFSIZ];
vflag = 0;
while ((c = getopt(argc, argv, "v")) == 'v')
vflag = 1;
if (c != EOF || optind == argc - 1 && strcmp(argv[optind], "=") == 0) {
(void) fprintf(stderr, "%s: usage is %s [ -v ] zonename ...\n",
argv[0], argv[0]);
exit(1);
}
(void) time(&now);
longest = 0;
for (i = optind; i < argc; ++i)
if (strlen(argv[i]) > longest)
longest = strlen(argv[i]);
for (i = optind; i < argc; ++i) {
if (settz(argv[i]) != 0) {
(void) fprintf(stderr,
"%s: wild result from settz(\"%s\")\n",
argv[0], argv[i]);
exit(1);
}
show(argv[i], now, FALSE);
if (!vflag)
continue;
if (argv[i][0] == '/')
fp = fopen(argv[i], "r");
else {
j = strlen(TZDIR) + 1 + strlen(argv[i]) + 1;
if (j > sizeof buf) {
(void) fprintf(stderr,
"%s: wild long timezone name %s\n",
argv[0], argv[i]);
exit(1);
}
(void) sprintf(buf, "%s/%s", TZDIR, argv[i]);
fp = fopen(buf, "r");
}
if (fp == NULL) {
(void) fprintf(stderr,
"%s: wild result opening %s file\n",
argv[0], argv[i]);
exit(1);
}
if (fread((char *) &h, sizeof h, 1, fp) != 1) {
(void) fprintf(stderr,
"%s: wild result reading %s file\n",
argv[0], argv[i]);
exit(1);
}
tp = (long *) calloc((alloc_t) h.tzh_timecnt, sizeof *tp);
if (tp == NULL) {
(void) fprintf(stderr,
"%s: wild result from calloc\n", argv[0]);
exit(1);
}
if (h.tzh_timecnt != 0)
if (fread((char *) tp, sizeof *tp, (int) h.tzh_timecnt,
fp) != h.tzh_timecnt) {
(void) fprintf(stderr,
"%s: wild result reading %s file\n",
argv[0], argv[i]);
exit(1);
}
if (fclose(fp)) {
(void) fprintf(stderr,
"%s: wild result closing %s file\n",
argv[0], argv[i]);
exit(1);
}
for (j = 0; j < h.tzh_timecnt; ++j) {
show(argv[i], tp[j] - 1, TRUE);
show(argv[i], tp[j], TRUE);
}
free((char *) tp);
}
return 0;
}
static
show(zone, t, v)
char * zone;
long t;
{
(void) printf("%-*s ", longest, zone);
if (v)
(void) printf("%.24s GMT = ", asctime(gmtime(&t)));
(void) printf("%.24s", newctime(&t));
if (*tz_abbr != '\0')
(void) printf(" %s", tz_abbr);
(void) printf("\n");
}