X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=lib%2Fsafe-write.h;h=ad4eac802be0c6272e910f2bbdc6faab8202e755;hb=573dad2ce496fa87dac2e79f37bae62e0be1d2c6;hp=1f1bcd272b6afc317d1e240463468cea92f36a6b;hpb=d60f3b0c6b0f93a601acd1cfd3923f94ca05abb0;p=gnulib.git

diff --git a/lib/safe-write.h b/lib/safe-write.h
index 1f1bcd272..ad4eac802 100644
--- a/lib/safe-write.h
+++ b/lib/safe-write.h
@@ -1,5 +1,5 @@
 /* An interface to write() that retries after interrupts.
-   Copyright (C) 2002, 2009-2011 Free Software Foundation, Inc.
+   Copyright (C) 2002, 2009-2012 Free Software Foundation, Inc.
 
    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
@@ -14,6 +14,19 @@
    You should have received a copy of the GNU General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
 
+/* Some system calls may be interrupted and fail with errno = EINTR in the
+   following situations:
+     - The process is stopped and restarted (signal SIGSTOP and SIGCONT, user
+       types Ctrl-Z) on some platforms: Mac OS X.
+     - The process receives a signal for which a signal handler was installed
+       with sigaction() with an sa_flags field that does not contain
+       SA_RESTART.
+     - The process receives a signal for which a signal handler was installed
+       with signal() and for which no call to siginterrupt(sig,0) was done,
+       on some platforms: AIX, HP-UX, IRIX, OSF/1, Solaris.
+
+   This module provides a wrapper around write() that handles EINTR.  */
+
 #include <stddef.h>
 
 #define SAFE_WRITE_ERROR ((size_t) -1)