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Re: CVS Feature Branch - version - cannot write to stdout


From: Mark D. Baushke
Subject: Re: CVS Feature Branch - version - cannot write to stdout
Date: Fri, 22 Oct 2004 16:45:25 -0700

Hi Conrad,

I am hoping that the following patch will work for your problem. If it
does, then I'll commit it. We will lose any error messages that the
select() may put into SOCK_ERRNO which is unfortunate. It might be
'better' to come up with a select() wrapper function in the general case
for windows to use, but I am not sure how useful it would be in this
case.

        -- Mark

2004-10-22  Mark D. Baushke  <address@hidden>

        * client.c (handle_m, handle_e): Winsock is returning
        SOCK_ERRNO == WSAENOTSOCK for select() problems and not
        setting errno. Do not bother with printing an error from a
        select() that is not returning an non-zero errno.
        (Report from Conrad T. Pino <address@hidden>.)

Index: src/client.c
===================================================================
RCS file: /cvs/ccvs/src/client.c,v
retrieving revision 1.402
diff -u -p -r1.402 client.c
--- src/client.c        22 Oct 2004 14:27:52 -0000      1.402
+++ src/client.c        22 Oct 2004 23:42:50 -0000
@@ -2666,8 +2666,9 @@ handle_m (char *args, size_t len)
     fflush (stderr);
     FD_ZERO (&wfds);
     FD_SET (STDOUT_FILENO, &wfds);
+    errno = 0;
     s = select (STDOUT_FILENO+1, NULL, &wfds, NULL, NULL);
-    if (s < 1)
+    if (s < 1 && errno != 0)
         perror ("cannot write to stdout");
     fwrite (args, len, sizeof (*args), stdout);
     putc ('\n', stdout);
@@ -2722,6 +2723,7 @@ handle_e (char *args, size_t len)
     fflush (stdout);
     FD_ZERO (&wfds);
     FD_SET (STDERR_FILENO, &wfds);
+    errno = 0;
     s = select (STDERR_FILENO+1, NULL, &wfds, NULL, NULL);
     /*
      * If stderr has problems, then adding a call to
@@ -2729,7 +2731,7 @@ handle_e (char *args, size_t len)
      * will not work. So, try to write a message on stdout and
      * terminate cvs.
      */
-    if (s < 1)
+    if (s < 1 && errno != 0)
         fperrmsg (stdout, 1, errno, "cannot write to stderr");
     fwrite (args, len, sizeof (*args), stderr);
     putc ('\n', stderr);




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