Add the -r option, patch from Rob with some help from myself.

1 files changed, 11 insertions, 4 deletions

diff --git a/coreutils/date.c b/coreutils/date.c
index 1aa3e22d2..a6b595e57 100644
--- a/coreutils/date.c
+++ b/coreutils/date.c
@@ -118,8 +118,9 @@ static struct tm *date_conv_ftime(struct tm *tm_time, const char *t_string)
 #define DATE_OPT_SET            0x02
 #define DATE_OPT_UTC            0x04
 #define DATE_OPT_DATE           0x08
+#define DATE_OPT_REFERENCE      0x10
 #ifdef CONFIG_FEATURE_DATE_ISOFMT
-# define DATE_OPT_TIMESPEC      0x10
+# define DATE_OPT_TIMESPEC      0x20
 #endif
 
 int date_main(int argc, char **argv)
@@ -133,6 +134,7 @@ int date_main(int argc, char **argv)
         time_t tm;
         unsigned long opt;
         struct tm tm_time;
+        char *filename = NULL;
 
 #ifdef CONFIG_FEATURE_DATE_ISOFMT
         int ifmt = 0;
@@ -143,8 +145,8 @@ int date_main(int argc, char **argv)
 # define GETOPT_ISOFMT
 #endif
         bb_opt_complementaly = "d~ds:s~ds";
-        opt = bb_getopt_ulflags(argc, argv, "Rs:ud:" GETOPT_ISOFMT,
-                                        &date_str, &date_str
+        opt = bb_getopt_ulflags(argc, argv, "Rs:ud:r:" GETOPT_ISOFMT,
+                                        &date_str, &date_str, &filename
 #ifdef CONFIG_FEATURE_DATE_ISOFMT
                                         , &isofmt_arg
 #endif
@@ -194,7 +196,12 @@ int date_main(int argc, char **argv)
         /* Now we have parsed all the information except the date format
            which depends on whether the clock is being set or read */
 
-        time(&tm);
+        if(filename) {
+                struct stat statbuf;
+                if(stat(filename,&statbuf))
+                        bb_perror_msg_and_die("File '%s' not found.\n",filename);
+                tm=statbuf.st_mtime;
+        } else time(&tm);
         memcpy(&tm_time, localtime(&tm), sizeof(tm_time));
         /* Zero out fields - take her back to midnight! */
         if (date_str != NULL) {