Add -g option to s6-tai64nlocal

3 files changed, 35 insertions, 3 deletions

diff --git a/doc/s6-svdt.html b/doc/s6-svdt.html
index bb78061..a908d8c 100644
--- a/doc/s6-svdt.html
+++ b/doc/s6-svdt.html
@@ -66,5 +66,12 @@ the latest <em>maxlines</em> deaths. </li>
  <li> 111: system call failed </li>
 </ul>
 
+<h2> Notes </h2>
+
+<ul>
+ <li> To obtain human-readable local time or GMT time instead of TAI64N timestamps,
+simply pipe s6-svdt's output into <a href="s6-tai64nlocal.html">s6-tai64nlocal</a>. </li>
+</ul>
+
 </body>
 </html>
diff --git a/doc/s6-tai64nlocal.html b/doc/s6-tai64nlocal.html
index 0c7e597..2df3f86 100644
--- a/doc/s6-tai64nlocal.html
+++ b/doc/s6-tai64nlocal.html
@@ -29,7 +29,7 @@ time.
 <h2> Interface </h2>
 
 <pre>
-     s6-tai64nlocal
+     s6-tai64nlocal [ -g ]
 </pre>
 
 <ul>
@@ -38,6 +38,12 @@ unfinished line, s6-tai64n processes it
 and writes it before exiting. </li>
 </ul>
 
+<h2> Options </h2>
+
+<ul>
+ <li> <tt>-g</tt>&nbsp;: print GMT time instead of local time. </li>
+</ul>
+
 <h2> Notes </h2>
 
 <ul>
diff --git a/src/daemontools-extras/s6-tai64nlocal.c b/src/daemontools-extras/s6-tai64nlocal.c
index 7084abd..097102b 100644
--- a/src/daemontools-extras/s6-tai64nlocal.c
+++ b/src/daemontools-extras/s6-tai64nlocal.c
@@ -4,14 +4,33 @@
 #include <errno.h>
 #include <skalibs/buffer.h>
 #include <skalibs/strerr2.h>
+#include <skalibs/sgetopt.h>
 #include <skalibs/tai.h>
 #include <skalibs/djbtime.h>
 #include <skalibs/stralloc.h>
 #include <skalibs/skamisc.h>
 
-int main (void)
+#define USAGE "s6-tai64nlocal [ -g ]"
+
+int main (int argc, char const *const *argv)
 {
+  int islocal = 1 ;
   PROG = "s6-tai64nlocal" ;
+  {
+    subgetopt_t l = SUBGETOPT_ZERO ;
+    for (;;)
+    {
+      int opt = subgetopt_r(argc, argv, "g", &l) ;
+      if (opt == -1) break ;
+      switch (opt)
+      {
+        case 'g' : islocal = 0 ; break ;
+        default : strerr_dieusage(100, USAGE) ;
+      }
+    }
+    argc -= l.ind ; argv += l.ind ;
+  }
+
   for (;;)
   {
     unsigned int p = 0 ;
@@ -28,7 +47,7 @@ int main (void)
       if (p)
       {
         localtmn_t local ;
-        if (localtmn_from_tain(&local, &a, 1))
+        if (localtmn_from_tain(&local, &a, islocal))
         {
           char fmt[LOCALTMN_FMT+1] ;
           size_t len = localtmn_fmt(fmt, &local) ;