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-rw-r--r--toys/posix/touch.c127
1 files changed, 90 insertions, 37 deletions
diff --git a/toys/posix/touch.c b/toys/posix/touch.c
index 938863d6..e350e754 100644
--- a/toys/posix/touch.c
+++ b/toys/posix/touch.c
@@ -4,68 +4,121 @@
* Copyright 2012 Choubey Ji <warior.linux@gmail.com>
*
* See http://pubs.opengroup.org/onlinepubs/9699919799/utilities/touch.html
+ * acmrtd
-USE_TOUCH(NEWTOY(touch, "mr:t:", TOYFLAG_BIN))
+USE_TOUCH(NEWTOY(touch, "acd:mr:t:[!dtr]", TOYFLAG_BIN))
config TOUCH
- bool "th"
+ bool "touch"
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
+
+ -a change access time
+ -m change modification time
+ -c don't create file
+ -d DATE use YYYY-MM-DDThh:mm:SS[.frac][tz] as time
+ -t TIME use [[CC]YY]MMDDhhmm[.ss][frac] as time
+ -r FILE use reference file's time
*/
#define FOR_touch
#include "toys.h"
GLOBALS(
- char *date;
+ char *time;
char *file;
+ char *date;
)
-void touch_main(void)
+int fetch(char *file, struct timeval *tv, unsigned flags)
{
- int fd;
- time_t now;
- struct utimbuf modinfo;
struct stat st;
- if (TT.date) {
- struct tm *tm = getdate(TT.date);
+ if (stat(TT.file, &st)) return 1;
- if (!tm) perror_exit("bad date '%s'", TT.date);
- now = mktime(tm);
- } else time(&now);
- modinfo.modtime = now;
- modinfo.actime = now;
-
- if (TT.file) {
- xstat(TT.file, &st);
- modinfo.modtime = st.st_mtime;
- modinfo.actime = st.st_atime;
+ if (flags & FLAG_a) {
+ tv[0].tv_sec = st.st_atime;
+ tv[0].tv_usec = st.st_atim.tv_nsec/1000;
+ }
+ if (flags & FLAG_m) {
+ tv[1].tv_sec = st.st_mtime;
+ tv[1].tv_usec = st.st_mtim.tv_nsec/1000;
}
- if (toys.optflags & FLAG_m) {
- if(stat(toys.optargs[toys.optc - 1], &st) < 0) {
- toys.exitval = EXIT_FAILURE;
- return;
+ return 0;
+}
+
+void touch_main(void)
+{
+ struct timeval tv[2];
+ struct tm tm;
+ char **ss;
+ int flag;
+
+ gettimeofday(tv, NULL);
+ localtime_r(&(tv->tv_sec), &tm);
+
+ if (toys.optflags & (FLAG_t|FLAG_d)) {
+ char *date, *s;
+ int i, len;
+
+ if (toys.optflags & FLAG_d) {
+ date = TT.date;
+ i = strlen(date)-1;
+ if (*date && toupper(date[i])=='Z') {
+ putenv("TZ=UTC");
+ strncpy(toybuf, date, sizeof(toybuf)-1);
+ date = toybuf;
+ date[i]=0;
+ gmtime_r(&(tv->tv_sec), &tm);
+ }
+ s = strptime(date, "%Y-%m-%dT%T", &tm);
+ if (s && *s=='.') {
+ sscanf(s, ".%d%n", &i, &len);
+ s += len;
+ tv->tv_usec = i;
+ }
+ } else {
+ strcpy(toybuf, "%Y%m%d%H%M");
+ date = TT.time;
+ for (i=0;i<3;i++) {
+ s = strptime(date, toybuf+(i&2), &tm);
+ if (s) break;
+ toybuf[1]='y';
+ }
+ if (s && *s=='.') {
+ int count = sscanf(s, ".%2d%u%n", &(tm.tm_sec), &i, &len);
+ if (count==2) tv->tv_usec = i;
+ s += len;
+ }
}
- modinfo.actime = st.st_atime;
- if(!(toys.optflags & (FLAG_r|FLAG_t))) {
- time(&now);
- modinfo.modtime = now;
+
+ errno = 0;
+ tv->tv_sec = mktime(&tm);
+ if (!s || *s || errno == EOVERFLOW) {
+ // Warn Indiana Jones the monkey died.
+ perror_exit("bad '%s'", date);
}
}
- 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_msg("can't create '%s'", toys.optargs[toys.optc-1]);
- toys.exitval = EXIT_FAILURE;
+ tv[1]=tv[0];
+
+ if (TT.file && fetch(TT.file, tv, FLAG_a|FLAG_m))
+ perror_exit("-r '%s'", TT.file);
+
+ flag = (~toys.optflags) & (FLAG_m|FLAG_a);
+ if (flag == (FLAG_m|FLAG_a)) flag = 0;
+ for (ss=toys.optargs; *ss;) {
+ int fd;
+
+ if ((!flag || !fetch(*ss, tv, flag)) && !utimes(*ss, tv)) ss++;
+ else if (toys.optflags & FLAG_c) ss++;
+ else if (-1 != (fd = open(*ss, O_CREAT, 0666))) close(fd);
+ else {
+ perror_msg("'%s'", *ss++);
+ toys.exitval = 1;
}
}
}