From 3315cae54873f180a26a37a5aaccaae5febec96e Mon Sep 17 00:00:00 2001
From: Laurent Bercot <ska-skaware@skarnet.org>
Date: Mon, 12 Oct 2015 14:04:28 +0000
Subject:  Add SIGWINCH support to s6-supervise and s6-svc (-y)

---
 doc/s6-svc.html                |  3 ++-
 src/supervision/s6-supervise.c | 23 ++++++++++++++---------
 src/supervision/s6-svc.c       |  3 ++-
 3 files changed, 18 insertions(+), 11 deletions(-)

diff --git a/doc/s6-svc.html b/doc/s6-svc.html
index 7c3b2bd..62fd1be 100644
--- a/doc/s6-svc.html
+++ b/doc/s6-svc.html
@@ -28,7 +28,7 @@ knowing their PIDs, and without using horrible hacks such as .pid files.
 <h2> Interface </h2>
 
 <pre>
-     s6-svc [ -wu | -wU | -wd | -wD | -wr | -wR ] [ -T <em>timeout</em> ] [ -abqhkti12pcoduxO ] <em>servicedir</em>
+     s6-svc [ -wu | -wU | -wd | -wD | -wr | -wR ] [ -T <em>timeout</em> ] [ -abqhkti12pcyoduxO ] <em>servicedir</em>
 </pre>
 
 <p>
@@ -52,6 +52,7 @@ a command, or 100 if no s6-supervise process is running on <em>servicedir</em>.
  <li> <tt>-2</tt>&nbsp;: send a SIGUSR2 to the supervised process </li>
  <li> <tt>-p</tt>&nbsp;: send a SIGSTOP to the supervised process </li>
  <li> <tt>-c</tt>&nbsp;: send a SIGCONT to the supervised process </li>
+ <li> <tt>-y</tt>&nbsp;: send a SIGWINCH to the supervised process </li>
  <li> <tt>-o</tt>&nbsp;: once. Equivalent to "-uO". </li>
  <li> <tt>-d</tt>&nbsp;: down. If the supervised process is up, send it
 a SIGTERM and a SIGCONT. Do not restart it. </li>
diff --git a/src/supervision/s6-supervise.c b/src/supervision/s6-supervise.c
index 4a09eaf..f682040 100644
--- a/src/supervision/s6-supervise.c
+++ b/src/supervision/s6-supervise.c
@@ -26,7 +26,7 @@ typedef enum trans_e trans_t, *trans_t_ref ;
 enum trans_e
 {
   V_TIMEOUT, V_CHLD, V_TERM, V_HUP, V_QUIT,
-  V_a, V_b, V_q, V_h, V_k, V_t, V_i, V_1, V_2, V_f, V_F, V_p, V_c,
+  V_a, V_b, V_q, V_h, V_k, V_t, V_i, V_1, V_2, V_f, V_F, V_p, V_c, V_y,
   V_o, V_d, V_u, V_x, V_O, V_X
 } ;
 
@@ -178,6 +178,11 @@ static void killc (void)
   announce() ;
 }
 
+static void killy (void)
+{
+  kill(status.pid, SIGWINCH) ;
+}
+
 static void failcoe (int fd)
 {
   register int e = errno ;
@@ -440,22 +445,22 @@ static void finish_X (void)
   finish_x() ;
 }
 
-static action_t_ref const actions[5][24] =
+static action_t_ref const actions[5][25] =
 {
   { &downtimeout, &nop, &bail, &bail, &bail,
-    &nop, &nop, &nop, &nop, &nop, &nop, &nop, &nop, &nop, &nop, &nop, &nop, &nop,
+    &nop, &nop, &nop, &nop, &nop, &nop, &nop, &nop, &nop, &nop, &nop, &nop, &nop, &nop,
     &down_o, &down_d, &down_u, &bail, &down_O, &bail },
   { &uptimeout, &up_z, &up_term, &up_x, &up_X,
-    &killa, &killb, &killq, &killh, &killk, &killt, &killi, &kill1, &kill2, &nop, &nop, &killp, &killc,
+    &killa, &killb, &killq, &killh, &killk, &killt, &killi, &kill1, &kill2, &nop, &nop, &killp, &killc, &killy,
     &up_o, &up_d, &up_u, &up_x, &up_o, &up_X },
   { &finishtimeout, &finish_z, &finish_x, &finish_x, &finish_X,
-    &nop, &nop, &nop, &nop, &nop, &nop, &nop, &nop, &nop, &nop, &nop, &nop, &nop,
+    &nop, &nop, &nop, &nop, &nop, &nop, &nop, &nop, &nop, &nop, &nop, &nop, &nop, &nop,
     &up_o, &down_d, &finish_u, &finish_x, &up_o, &finish_X },
   { &uptimeout, &lastup_z, &up_d, &nop, &closethem,
-    &killa, &killb, &killq, &killh, &killk, &killt, &killi, &kill1, &kill2, &nop, &nop, &killp, &killc,
+    &killa, &killb, &killq, &killh, &killk, &killt, &killi, &kill1, &kill2, &nop, &nop, &killp, &killc, &killy,
     &up_o, &up_d, &nop, &nop, &up_o, &closethem },
   { &finishtimeout, &bail, &nop, &nop, &closethem,
-    &nop, &nop, &nop, &nop, &nop, &nop, &nop, &nop, &nop, &nop, &nop, &nop, &nop,
+    &nop, &nop, &nop, &nop, &nop, &nop, &nop, &nop, &nop, &nop, &nop, &nop, &nop, &nop,
     &nop, &nop, &nop, &nop, &nop, &closethem }
 } ;
 
@@ -536,8 +541,8 @@ static inline void handle_control (int fd)
     else if (!r) break ;
     else
     {
-      register unsigned int pos = byte_chr("abqhkti12fFpcoduxOX", 19, c) ;
-      if (pos < 19) (*actions[state][V_a + pos])() ;
+      register unsigned int pos = byte_chr("abqhkti12fFpcyoduxOX", 20, c) ;
+      if (pos < 20) (*actions[state][V_a + pos])() ;
     }
   }
 }
diff --git a/src/supervision/s6-svc.c b/src/supervision/s6-svc.c
index 467c174..cc92618 100644
--- a/src/supervision/s6-svc.c
+++ b/src/supervision/s6-svc.c
@@ -26,7 +26,7 @@ int main (int argc, char const *const *argv, char const *const *envp)
     subgetopt_t l = SUBGETOPT_ZERO ;
     for (;;)
     {
-      register int opt = subgetopt_r(argc, argv, "abqhkti12pcoduxOXT:w:", &l) ;
+      register int opt = subgetopt_r(argc, argv, "abqhkti12pcoduxOXyT:w:", &l) ;
       if (opt == -1) break ;
       switch (opt)
       {
@@ -47,6 +47,7 @@ int main (int argc, char const *const *argv, char const *const *envp)
         case 'x' :
         case 'O' :
         case 'X' :
+        case 'y' :
         {
           if (datalen >= DATASIZE) strerr_dief1x(100, "too many commands") ;
           data[datalen++] = opt ;
-- 
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