Simplify selfpipe management

Signed-off-by: Laurent Bercot <ska@appnovation.com>

7 files changed, 16 insertions, 21 deletions

diff --git a/src/fdholder/s6-fdholderd.c b/src/fdholder/s6-fdholderd.c
index 073f7bf..d357127 100644
--- a/src/fdholder/s6-fdholderd.c
+++ b/src/fdholder/s6-fdholderd.c
@@ -645,7 +645,6 @@ static inline int new_connection (int fd, regex_t *rre, regex_t *wre, unsigned i
 
 int main (int argc, char const *const *argv, char const *const *envp)
 {
-  int spfd ;
   int flag1 = 0 ;
   uint32_t maxconn = 16 ;
   PROG = "s6-fdholderd" ;
@@ -700,8 +699,7 @@ int main (int argc, char const *const *argv, char const *const *envp)
       strerr_dief1sys(100, "called with option -1 but stdout said") ;
   }
   else close(1) ;
-  spfd = selfpipe_init() ;
-  if (spfd < 0) strerr_diefu1sys(111, "selfpipe_init") ;
+  if (selfpipe_init() == -1) strerr_diefu1sys(111, "selfpipe_init") ;
   if (!sig_ignore(SIGPIPE)) strerr_diefu1sys(111, "ignore SIGPIPE") ;
   {
     sigset_t set ;
@@ -743,7 +741,7 @@ int main (int argc, char const *const *argv, char const *const *envp)
     avltreen_init(&fddeadlineinfo, fddeadlinestorage, fddeadlinefreelist, maxfds, &fds_deadline_dtok, &fds_deadline_cmp, 0) ;
     fds_by_deadline = &fddeadlineinfo ;
 
-    x[0].fd = spfd ; x[0].events = IOPAUSE_READ ;
+    x[0].fd = selfpipe_fd() ; x[0].events = IOPAUSE_READ ;
     x[1].fd = 0 ;
       
     if (flag1)
diff --git a/src/libs6/s6lockd.c b/src/libs6/s6lockd.c
index 04861ba..e7303af 100644
--- a/src/libs6/s6lockd.c
+++ b/src/libs6/s6lockd.c
@@ -180,7 +180,6 @@ static int parse_protocol (struct iovec const *v, void *context)
 int main (int argc, char const *const *argv)
 {
   tain deadline ;
-  int sfd ;
   PROG = "s6lockd" ;
   
   if (argc < 2) strerr_dieusage(100, USAGE) ;
@@ -189,8 +188,7 @@ int main (int argc, char const *const *argv)
   if (ndelay_on(1) < 0) strerr_diefu2sys(111, "ndelay_on ", "1") ;
   if (!sig_altignore(SIGPIPE)) strerr_diefu1sys(111, "ignore SIGPIPE") ;
 
-  sfd = selfpipe_init() ;
-  if (sfd < 0) strerr_diefu1sys(111, "selfpipe_init") ;
+  if (selfpipe_init() == -1) strerr_diefu1sys(111, "selfpipe_init") ;
   {
     sigset_t set ;
     sigemptyset(&set) ;
@@ -222,7 +220,7 @@ int main (int argc, char const *const *argv)
     x[1].fd = 1 ; x[1].events = IOPAUSE_EXCEPT | (textmessage_sender_isempty(textmessage_sender_1) ? 0 : IOPAUSE_WRITE ) ;
     x[2].fd = textmessage_sender_fd(textmessage_sender_x) ;
     x[2].events = IOPAUSE_EXCEPT | (textmessage_sender_isempty(textmessage_sender_x) ? 0 : IOPAUSE_WRITE) ;
-    x[3].fd = sfd ; x[3].events = IOPAUSE_READ ;
+    x[3].fd = selfpipe_fd() ; x[3].events = IOPAUSE_READ ;
     for (; i < n ; i++)
     {
       s6lockio_t *p = genalloc_s(s6lockio_t, &a) + i ;
diff --git a/src/supervision/s6-svlisten.c b/src/supervision/s6-svlisten.c
index 1e060cf..205a382 100644
--- a/src/supervision/s6-svlisten.c
+++ b/src/supervision/s6-svlisten.c
@@ -8,6 +8,7 @@
 #include <skalibs/tai.h>
 #include <skalibs/strerr.h>
 #include <skalibs/djbunix.h>
+#include <skalibs/selfpipe.h>
 
 #include <s6/compat.h>
 #include "s6-svlisten.h"
@@ -18,7 +19,6 @@
 int main (int argc, char const **argv, char const *const *envp)
 {
   tain deadline, tto ;
-  int spfd ;
   int argc1 ;
   int or = 0 ;
   int wantup = 1, wantready = 0 ;
@@ -59,7 +59,7 @@ int main (int argc, char const **argv, char const *const *envp)
 
   tain_now_set_stopwatch_g() ;
   tain_add_g(&deadline, &tto) ;
-  spfd = s6_svlisten_selfpipe_init() ;
+  s6_svlisten_selfpipe_init() ;
 
   {
     s6_svlisten_t foo = S6_SVLISTEN_ZERO ;
@@ -74,10 +74,10 @@ int main (int argc, char const **argv, char const *const *envp)
     if (wantup == 2)
     {
       wantup = 1 ;
-      e = s6_svlisten_loop(&foo, 0, 1, or, &deadline, spfd, &s6_svlisten_signal_handler) ;
+      e = s6_svlisten_loop(&foo, 0, 1, or, &deadline, selfpipe_fd(), &s6_svlisten_signal_handler) ;
       if (e) strerr_dief1x(e, "some services reported permanent failure or their supervisor died") ;
     }
-    e = s6_svlisten_loop(&foo, wantup, wantready, or, &deadline, spfd, &s6_svlisten_signal_handler) ;
+    e = s6_svlisten_loop(&foo, wantup, wantready, or, &deadline, selfpipe_fd(), &s6_svlisten_signal_handler) ;
     if (e) strerr_dief1x(e, "some services reported permanent failure or their supervisor died") ;
   }
   return 0 ;
diff --git a/src/supervision/s6-svlisten.h b/src/supervision/s6-svlisten.h
index 92636ee..a0aa591 100644
--- a/src/supervision/s6-svlisten.h
+++ b/src/supervision/s6-svlisten.h
@@ -22,7 +22,7 @@ struct s6_svlisten_s
 #define S6_SVLISTEN_ZERO { .a = FTRIGR_ZERO, .n = 0, .ids = 0, .upstate = 0, .readystate = 0 }
 
 extern void s6_svlisten_signal_handler (void) ;
-extern int s6_svlisten_selfpipe_init (void) ;
+extern void s6_svlisten_selfpipe_init (void) ;
 extern void s6_svlisten_init (int, char const *const *, s6_svlisten_t *, uint16_t *, unsigned char *, unsigned char *, tain const *) ;
 extern unsigned int s6_svlisten_loop (s6_svlisten_t *, int, int, int, tain const *, int, action_func_ref) ;
 
diff --git a/src/supervision/s6-svlisten1.c b/src/supervision/s6-svlisten1.c
index 7102685..ab4f44c 100644
--- a/src/supervision/s6-svlisten1.c
+++ b/src/supervision/s6-svlisten1.c
@@ -7,6 +7,7 @@
 #include <skalibs/tai.h>
 #include <skalibs/strerr.h>
 #include <skalibs/djbunix.h>
+#include <skalibs/selfpipe.h>
 
 #include "s6-svlisten.h"
 
@@ -18,7 +19,6 @@ int main (int argc, char const *const *argv, char const *const *envp)
   s6_svlisten_t foo = S6_SVLISTEN_ZERO ;
   tain deadline, tto ;
   pid_t pid ;
-  int spfd ;
   int wantup = 1, wantready = 0, wantrestart = 0 ;
   uint16_t id ;
   unsigned char upstate, readystate ;
@@ -48,14 +48,14 @@ int main (int argc, char const *const *argv, char const *const *envp)
   if (argc < 2) dieusage() ;
   tain_now_set_stopwatch_g() ;
   tain_add_g(&deadline, &tto) ;
-  spfd = s6_svlisten_selfpipe_init() ;
+  s6_svlisten_selfpipe_init() ;
   s6_svlisten_init(1, argv, &foo, &id, &upstate, &readystate, &deadline) ;
   pid = child_spawn0(argv[1], argv + 1, envp) ;
   if (!pid) strerr_diefu2sys(111, "spawn ", argv[1]) ;
   if (wantrestart)
-    if (s6_svlisten_loop(&foo, 0, 1, 1, &deadline, spfd, &s6_svlisten_signal_handler))
+    if (s6_svlisten_loop(&foo, 0, 1, 1, &deadline, selfpipe_fd(), &s6_svlisten_signal_handler))
       strerr_dief2x(1, argv[0], " failed permanently or its supervisor died") ;
-  if (s6_svlisten_loop(&foo, wantup, wantready, 1, &deadline, spfd, &s6_svlisten_signal_handler))
+  if (s6_svlisten_loop(&foo, wantup, wantready, 1, &deadline, selfpipe_fd(), &s6_svlisten_signal_handler))
     strerr_dief2x(1, argv[0], " failed permanently or its supervisor died") ;
   return 0 ;
 }
diff --git a/src/supervision/s6_svlisten_loop.c b/src/supervision/s6_svlisten_loop.c
index 97b155e..d7234b1 100644
--- a/src/supervision/s6_svlisten_loop.c
+++ b/src/supervision/s6_svlisten_loop.c
@@ -9,6 +9,7 @@
 #include <skalibs/iopause.h>
 #include <skalibs/stralloc.h>
 #include <skalibs/djbunix.h>
+#include <skalibs/selfpipe.h>
 
 #include <s6/ftrigw.h>
 #include <s6/ftrigr.h>
diff --git a/src/supervision/s6_svlisten_signal_handler.c b/src/supervision/s6_svlisten_signal_handler.c
index 723771f..bf47146 100644
--- a/src/supervision/s6_svlisten_signal_handler.c
+++ b/src/supervision/s6_svlisten_signal_handler.c
@@ -9,13 +9,11 @@
 
 #include "s6-svlisten.h"
 
-int s6_svlisten_selfpipe_init (void)
+void s6_svlisten_selfpipe_init (void)
 {
-  int spfd = selfpipe_init() ;
-  if (spfd < 0) strerr_diefu1sys(111, "selfpipe_init") ;
+  if (selfpipe_init() == -1) strerr_diefu1sys(111, "selfpipe_init") ;
   if (!selfpipe_trap(SIGCHLD)) strerr_diefu1sys(111, "selfpipe_trap") ;
   if (!sig_altignore(SIGPIPE)) strerr_diefu1sys(111, "ignore SIGPIPE") ;
-  return spfd ;
 }
 
 void s6_svlisten_signal_handler (void)