diff options
| -rw-r--r-- | toys/posix/touch.c | 157 |
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; +} |