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/* vi: set sw=4 ts=4:
*
* touch.c : change timestamp of a file
* Copyright 2012 Choubey Ji <warior.linux@gmail.com>
*
* See http://pubs.opengroup.org/onlinepubs/9699919799/utilities/touch.html
USE_TOUCH(NEWTOY(touch, "mrt", TOYFLAG_BIN))
config TOUCH
bool "th"
default y
help
Usage: Usage: touch [OPTION]... FILE...
Update the access and modification times of each FILE to the current time.
-m change only the modification time
-r, --reference=FILE use this file's times instead of current time
-t STAMP use [[CC]YY]MMDDhhmm[.ss] instead of current time
*/
#include "toys.h"
int check_date_format(char *date_input)
{
int count_date_digit = 0;
unsigned long long flag_b4_sec;
int flag_af_sec;
char *date_store = (char *)malloc(12 * sizeof(char));
while(date_input[count_date_digit] != '.') {
date_store[count_date_digit] = date_input[count_date_digit];
count_date_digit++;
}
date_store[count_date_digit++] = '\0';
flag_b4_sec = atoll(date_store);
date_store[0] = date_input[count_date_digit++];
date_store[1] = date_input[count_date_digit];
date_store[2] = '\0';
flag_af_sec = atoi(date_store);
if(date_store[0] == '0' && date_store[1] == '0') flag_af_sec = 1;
if(flag_b4_sec && flag_af_sec) return 0;
else return -1;
}
/* function to return number of seconds since epoch till the given date */
time_t get_time_sec(char *date_input)
{
int count_date_digit = 0;
char mm[3];
char year[5];
time_t time_of_modify;
struct tm t_yyyymmddhhss;
while(date_input[count_date_digit] != '.') {
if(count_date_digit < 4)
year[count_date_digit] = date_input[count_date_digit];
count_date_digit++;
if(count_date_digit == 4) {
year[count_date_digit] = '\0';
t_yyyymmddhhss.tm_year = atoi(year)-1900;
break;
}
}
mm[0] = date_input[4];
mm[1] = date_input[5];
mm[2] = '\0';
t_yyyymmddhhss.tm_mon = (atoi(mm) - 1);
mm[0] = date_input[6];
mm[1] = date_input[7];
mm[2] = '\0';
t_yyyymmddhhss.tm_mday = atoi(mm);
mm[0] = date_input[8];
mm[1] = date_input[9];
mm[2] = '\0';
t_yyyymmddhhss.tm_hour = atoi(mm);
mm[0] = date_input[10];
mm[1] = date_input[11];
mm[2] = '\0';
t_yyyymmddhhss.tm_min = atoi(mm);
mm[0] = date_input[13];
mm[1] = date_input[14];
mm[2] = '\0';
t_yyyymmddhhss.tm_sec = atoi(mm);
time_of_modify = mktime(&t_yyyymmddhhss);
return time_of_modify;
}
void touch_main(void)
{
int fd, touch_flag_t = 0, touch_flag_m = 0, touch_flag_r = 0;
time_t now;
struct utimbuf modinfo;
struct stat filestat;
if (!toys.optflags) {
time(&now);
modinfo.modtime = now;
modinfo.actime = now;
} else {
if (toys.optflags & 1) {
touch_flag_t = 1;
if ((toys.optflags >> 2) & 1) touch_flag_m = 1;
}
if ((toys.optflags >> 1) & 1) touch_flag_r = 1;
if (toys.optflags >> 2) touch_flag_m = 1;
}
if (touch_flag_t) {
if (!check_date_format(toys.optargs[0])) {
modinfo.modtime = get_time_sec((char *)toys.optargs[0]);
modinfo.actime = get_time_sec(toys.optargs[0]);
} else {
perror_msg("Invalid date format, -t [yyyyMMddhhmm.ss]");
toys.exitval = EXIT_FAILURE;
}
}
if(touch_flag_r) {
if(stat(toys.optargs[0], &filestat) < 0) {
printf("Error : unable to get information for file %s\n", toys.optargs[0]);
toys.exitval = EXIT_FAILURE;
}
modinfo.modtime = filestat.st_mtime;
modinfo.actime = filestat.st_atime;
}
if(touch_flag_m) {
if(stat(toys.optargs[toys.optc - 1], &filestat) < 0) {
toys.exitval = EXIT_FAILURE;
return;
}
modinfo.actime = filestat.st_atime;
if(!(touch_flag_r | touch_flag_t)) {
time(&now);
modinfo.modtime = now;
}
}
if (utime(toys.optargs[toys.optc - 1], &modinfo) == -1) {
if ((fd = open(toys.optargs[toys.optc - 1],O_CREAT |O_RDWR, 0644)) != -1) {
close(fd);
utime(toys.optargs[toys.optc - 1], &modinfo);
} else {
perror("unable to create the file");
toys.exitval = EXIT_FAILURE;
}
}
}
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