Attachment 1002 Details for Bug 1102 – Handle zero-length reads on AIX ptys

[patch] Handle zero-length reads on AIX ptys

openssh-aix-zeroread.patch (text/plain), 1.92 KB, created by Darren Tucker on 2005-10-17 23:47:18 AEST

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Creator: Darren Tucker

Created: 2005-10-17 23:47:18 AEST

Size: 1.92 KB

patch

obsolete

>Index: channels.c
>===================================================================
>RCS file: /usr/local/src/security/openssh/cvs/openssh_cvs/channels.c,v
>retrieving revision 1.202
>diff -u -p -r1.202 channels.c
>--- channels.c	3 Oct 2005 08:03:05 -0000	1.202
>+++ channels.c	13 Oct 2005 11:28:24 -0000
>@@ -1374,10 +1374,11 @@ channel_handle_rfd(Channel *c, fd_set * 
> 
> 	if (c->rfd != -1 &&
> 	    FD_ISSET(c->rfd, readset)) {
>+		errno = 0;
> 		len = read(c->rfd, buf, sizeof(buf));
> 		if (len < 0 && (errno == EINTR || errno == EAGAIN))
> 			return 1;
>-		if (len <= 0) {
>+		if (len < 0 || (len == 0 && errno != 0)) {
> 			debug2("channel %d: read<=0 rfd %d len %d",
> 			    c->self, c->rfd, len);
> 			if (c->type != SSH_CHANNEL_OPEN) {
>Index: serverloop.c
>===================================================================
>RCS file: /usr/local/src/security/openssh/cvs/openssh_cvs/serverloop.c,v
>retrieving revision 1.119
>diff -u -p -r1.119 serverloop.c
>--- serverloop.c	17 Jul 2005 07:26:44 -0000	1.119
>+++ serverloop.c	13 Oct 2005 10:45:10 -0000
>@@ -370,10 +370,11 @@ process_input(fd_set * readset)
> 
> 	/* Read and buffer any available stdout data from the program. */
> 	if (!fdout_eof && FD_ISSET(fdout, readset)) {
>+		errno = 0;
> 		len = read(fdout, buf, sizeof(buf));
> 		if (len < 0 && (errno == EINTR || errno == EAGAIN)) {
> 			/* do nothing */
>-		} else if (len <= 0) {
>+		} else if (len < 0 || (len == 0 && errno != 0)) {
> 			fdout_eof = 1;
> 		} else {
> 			buffer_append(&stdout_buffer, buf, len);
>@@ -382,10 +383,11 @@ process_input(fd_set * readset)
> 	}
> 	/* Read and buffer any available stderr data from the program. */
> 	if (!fderr_eof && FD_ISSET(fderr, readset)) {
>+		errno = 0;
> 		len = read(fderr, buf, sizeof(buf));
> 		if (len < 0 && (errno == EINTR || errno == EAGAIN)) {
> 			/* do nothing */
>-		} else if (len <= 0) {
>+		} else if (len < 0 || (len == 0 && errno != 0)) {
> 			fderr_eof = 1;
> 		} else {
> 			buffer_append(&stderr_buffer, buf, len);

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