X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=lib%2Fsafe-read.h;h=87417bc213a21f22dcbde2369239b429c3a420f8;hb=fc5b3a7190a490a169f2d53a54b393a68fab9ec2;hp=047033dccb8ed07428c97b2093d7e5db39bb27cb;hpb=3030c5b5e0a5199e16b05927da72c43c42f211c3;p=gnulib.git

diff --git a/lib/safe-read.h b/lib/safe-read.h
index 047033dcc..87417bc21 100644
--- a/lib/safe-read.h
+++ b/lib/safe-read.h
@@ -1,5 +1,5 @@
 /* An interface to read() that retries after interrupts.
-   Copyright (C) 2002, 2006, 2009 Free Software Foundation, Inc.
+   Copyright (C) 2002, 2006, 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 read() that handles EINTR.  */
+
 #include <stddef.h>
 
 #ifdef __cplusplus