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-rw-r--r--toys/posix/touch.c157
1 files changed, 157 insertions, 0 deletions
diff --git a/toys/posix/touch.c b/toys/posix/touch.c
new file mode 100644
index 00000000..3f2becb5
--- /dev/null
+++ b/toys/posix/touch.c
@@ -0,0 +1,157 @@
+/* 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"
+
+time_t get_time_sec(char *);
+
+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;
+ }
+ }
+}
+
+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 temp_date[12];
+ char mm[2];
+ char dd[2];
+ char hh[2];
+ char ss[2];
+ char year[4];
+ 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;
+}