X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;ds=sidebyside;f=lib%2Fsafe-write.h;h=5c4ef381f440653e423b21f96e1d4cefa343d2a3;hb=0e1c6ff93f27c939ba9e0df945b16ef98eaaeef1;hp=da036a97a1054a600bf808f5b9ed89969996c4ae;hpb=57fdfd3f8ec62b105c53bcdf6f127c35c7fe7391;p=gnulib.git

diff --git a/lib/safe-write.h b/lib/safe-write.h
index da036a97a..5c4ef381f 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 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: MacOS 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)