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/* 1. Erase archive symbol table's timestamp from ar archives,
* make it easy to `diff'. (option -e)
* 2. Check the sanity of timestamp. (option -c)
*
* $Id: teraser.c 3102 2014-10-29 21:09:01Z jkoshy $
*/
#include <errno.h>
#include <fcntl.h>
#include <getopt.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <unistd.h>
#define TSPOS 24 /* position of timestamp */
#define TSLEN 10 /* length of timstamp string */
#define TDELAY 3 /* max delay allowed */
#define COUNTER "/tmp/bsdar-test-total"
#define PASSED "/tmp/bsdar-test-passed"
static void usage(void);
int
main(int argc, char **argv)
{
char opt;
char checktime;
char erasetime;
char buf[TSLEN + 1];
char *tc;
int fd;
int ts;
int now;
FILE *ct, *ps;
checktime = 0;
erasetime = 0;
tc = NULL;
while ((opt = getopt(argc, argv, "cet:")) != -1) {
switch(opt) {
case 'c':
checktime = 1;
break;
case 'e':
erasetime = 1;
break;
case 't':
tc = optarg;
break;
default:
usage();
}
}
argv += optind;
if (*argv == NULL)
usage();
for (; *argv != NULL; argv++) {
if (checktime) {
if ((fd = open(*argv, O_RDONLY)) == -1) {
fprintf(stderr,
"open %s failed(%s), skipping time check...\n,",
*argv, strerror(errno));
goto ctend;
}
if ((lseek(fd, TSPOS, SEEK_SET)) == -1) {
fprintf(stderr,
"lseek %s failed(%s), skipping...\n,",
*argv, strerror(errno));
goto ctend;
}
if ((read(fd, buf, TSLEN)) != TSLEN) {
fprintf(stderr,
"read %s failed(%s), skipping...\n,",
*argv, strerror(errno));
goto ctend;
}
buf[TSLEN] = '\0';
ts = atoi(buf);
now = time(NULL);
if (ts <= now && ts >= now - TDELAY) {
fprintf(stderr, "%s - timestamp ok\n", tc);
if ((ps = fopen(PASSED, "r")) != NULL) {
if (fgets(buf, TSLEN, ps) != buf)
perror("fgets");
snprintf(buf, TSLEN, "%d\n",
atoi(buf) + 1);
fclose(ps);
}
if ((ps = fopen(PASSED, "w")) != NULL) {
fputs(buf, ps);
fclose(ps);
}
} else {
fprintf(stderr, "%s - timestamp not ok\n", tc);
}
if ((ct = fopen(COUNTER, "r")) != NULL) {
if (fgets(buf, TSLEN, ct) != buf)
perror("fgets");
snprintf(buf, TSLEN, "%d\n", atoi(buf) + 1);
fclose(ct);
}
if ((ct = fopen(COUNTER, "w")) != NULL) {
fputs(buf, ct);
fclose(ct);
}
ctend:
close(fd);
}
if (erasetime) {
if ((fd = open(*argv, O_RDWR)) == -1) {
fprintf(stderr,
"open %s failed(%s), skipping time check...\n,",
*argv, strerror(errno));
goto etend;
}
if ((lseek(fd, TSPOS, SEEK_SET)) == -1) {
fprintf(stderr, "lseek %s failed(%s), skipping...,",
*argv, strerror(errno));
goto etend;
}
memset(buf, 32, TSLEN);
if ((write(fd, buf, TSLEN)) != TSLEN)
fprintf(stderr,
"read %s failed(%s), skipping...\n,",
*argv, strerror(errno));
etend:
close(fd);
}
}
exit(EXIT_SUCCESS);
}
static void
usage(void)
{
fprintf(stderr, "usage: teraser [-ce] [-t name] archive ...\n");
exit(EXIT_FAILURE);
}
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