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Add proper d- and t-flag support to touch(1)

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except the [,frac], [.frac] respectively, but that's ok.
This commit is contained in:
FRIGN
2015-02-19 18:54:56 +01:00
parent c2b400bbd8
commit b00a00703f
3 changed files with 89 additions and 17 deletions
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63
touch.c
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@@ -4,6 +4,7 @@
#include <errno.h>
#include <fcntl.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <unistd.h>
#include <utime.h>
@@ -43,6 +44,61 @@ touch(const char *file)
touch(file);
}
time_t
parsetime(char *str, time_t current)
{
struct tm *cur, t;
char *format;
size_t len = strlen(str);
cur = localtime(&current);
t.tm_isdst = -1;
switch (len) {
/* -t flag argument */
case 8:
t.tm_sec = 0;
t.tm_year = cur->tm_year;
format = "%m%d%H%M";
break;
case 10:
t.tm_sec = 0;
format = "%y%m%d%H%M";
break;
case 11:
t.tm_year = cur->tm_year;
format = "%m%d%H%M.%S";
break;
case 12:
t.tm_sec = 0;
format = "%Y%m%d%H%M";
break;
case 13:
format = "%y%m%d%H%M.%S";
break;
case 15:
format = "%Y%m%d%H%M.%S";
break;
/* -d flag argument */
case 19:
format = "%Y-%m-%dT%H:%M:%S";
break;
case 20:
/* only Zulu-timezone supported */
if (str[19] != 'Z')
goto default;
format = "%Y-%m-%dT%H:%M:%S%Z";
break;
default:
eprintf("Invalid date format length\n", str);
}
if (!strptime(str, format, &t))
weprintf("strptime %s: Invalid date format\n", str);
return mktime(&t);
}
static void
usage(void)
{
@@ -72,15 +128,20 @@ main(int argc, char *argv[])
eprintf("stat '%s':", ref);
t = st.st_mtime;
break;
case 't':
case 'T':
t = estrtonum(EARGF(usage()), 0, LLONG_MAX);
break;
case 't':
t = parsetime(EARGF(usage()), t);
break;
default:
usage();
} ARGEND;
if (argc < 1)
usage();
if (!aflag && !mflag)
aflag = mflag = 1;
for (; argc > 0; argc--, argv++)
touch(argv[0]);