From 58c02e5fee86a059231fec3bc80b44774b1d603c Mon Sep 17 00:00:00 2001
From: Laurent Bercot <ska-skaware@skarnet.org>
Date: Wed, 27 May 2026 02:35:28 +0000
Subject:  iopause: limit spurious returns. sarealpath: align no PATH_MAX case.

---
 src/libstddjb/iopause_select.c |  2 +-
 src/libstddjb/iopause_stamp.c  | 22 ++++++++++++++++------
 src/libstddjb/sarealpath.c     |  2 ++
 3 files changed, 19 insertions(+), 7 deletions(-)

diff --git a/src/libstddjb/iopause_select.c b/src/libstddjb/iopause_select.c
index 6ca2f20..8cf0b87 100644
--- a/src/libstddjb/iopause_select.c
+++ b/src/libstddjb/iopause_select.c
@@ -31,7 +31,7 @@ int iopause_select (iopause_fd *x, unsigned int len, tain const *deadline, tain
       else deadline = 0 ;
     }
 #ifndef SKALIBS_HASSELECTINFINITE
-    if (deadline && tv.tv_sec >= 100000000)
+    if (tv.tv_sec >= 100000000)
     {
       tv.tv_sec = 100000000 ;
       tv.tv_usec = 0 ;
diff --git a/src/libstddjb/iopause_stamp.c b/src/libstddjb/iopause_stamp.c
index 890909b..0eb546b 100644
--- a/src/libstddjb/iopause_stamp.c
+++ b/src/libstddjb/iopause_stamp.c
@@ -8,10 +8,20 @@
 int iopause_stamp (iopause_fd *x, unsigned int n, tain const *deadline, tain *stamp)
 {
   int e = errno ;
-  int r ;
-  do r = iopause(x, n, deadline, stamp) ;
-  while (r == -1 && errno == EINTR) ;
-  if (stamp) tain_now(stamp) ;
-  if (r >= 0) errno = e ;
-  return r ;
+  for (;;)
+  {
+    int r = iopause(x, n, deadline, stamp) ;
+    if (r == -1)
+    {
+      if (errno != EINTR) return -1 ;
+      if (stamp) tain_now(stamp) ;
+    }
+    else
+    {
+      if (stamp) tain_now(stamp) ;
+      errno = e ;
+      if (r > 0) return r ;
+      if (deadline && stamp && !tain_less(stamp, deadline)) return 0 ;
+    }
+  }
 }
diff --git a/src/libstddjb/sarealpath.c b/src/libstddjb/sarealpath.c
index 8c994c4..ff4ee4f 100644
--- a/src/libstddjb/sarealpath.c
+++ b/src/libstddjb/sarealpath.c
@@ -3,6 +3,7 @@
 #include <limits.h>
 #include <string.h>
 #include <stdlib.h>
+
 #include <skalibs/stralloc.h>
 #include <skalibs/djbunix.h>
 
@@ -23,6 +24,7 @@ int sarealpath (stralloc *sa, char const *path)
       return -1 ;
     }
     free(p) ;
+    sa->len-- ;
 #endif
   }
   else
-- 
cgit v1.3.1