date: support -d @SECONDS_SINCE_1970

function                                             old     new   delta
parse_datestr                                        647     721     +74

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

diff --git a/libbb/time.c b/libbb/time.c
index 5cd0426..8d176e5 100644 (file)
--- a/libbb/time.c
+++ b/libbb/time.c
@@ -68,6 +68,16 @@ void FAST_FUNC parse_datestr(const char *date_str, struct tm *ptm)
                                end = '\0';
                        /* else end != NUL and we error out */
                }
+       } else if (date_str[0] == '@') {
+               time_t t = bb_strtol(date_str + 1, NULL, 10);
+               if (!errno) {
+                       struct tm *lt = localtime(&t);
+                       if (lt) {
+                               *ptm = *lt;
+                               return;
+                       }
+               }
+               end = '1';
        } else {
                /* Googled the following on an old date manpage:
                 *