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* subshell.c (feed_subshell): Reading 0 bytes in a channel with

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FD_ISSET being set is a sign of something being wrong - exit
immediately.  Observed when mc is run under su in xterm and
xterm is closed while the subshell is running.
Reported by Vlad Harchev <hvv@hippo.ru>
This commit is contained in:
Pavel Roskin 2002-07-30 00:03:26 +00:00
parent 777c46ee2a
commit 2935c85c85
2 changed files with 17 additions and 13 deletions
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6
src/ChangeLog
View File

@ -1,5 +1,11 @@
2002-07-29 Pavel Roskin <proski@gnu.org>
* subshell.c (feed_subshell): Reading 0 bytes in a channel with
FD_ISSET being set is a sign of something being wrong - exit
immediately. Observed when mc is run under su in xterm and
xterm is closed while the subshell is running.
Reported by Vlad Harchev <hvv@hippo.ru>
* color.h: Replace PORT_COLOR macro with BEST_COLOR, which uses
MY_COLOR_PAIR.

24
src/subshell.c
View File

@ -990,22 +990,20 @@ static int feed_subshell (int how, int fail_on_error)
/* for (i=0; i<5; ++i) * FIXME -- experimental */
{
bytes = read (subshell_pty, pty_buffer, pty_buffer_size);
/* Patch from viro@math.psu.edu
* add by MichaelBramer (Debian MC-Maintainer */
/* The subshell has died */
if (bytes == -1 && errno == EIO && !subshell_alive)
{
return FALSE;
}
if (bytes == -1)
/* end from the patch */
if (bytes <= 0)
{
tcsetattr (STDOUT_FILENO, TCSANOW, &shell_mode);
perror ("\n"__FILE__": read (subshell_pty...)");
exit (1);
}
if (bytes > 0)
if (how == VISIBLY)
write (STDOUT_FILENO, pty_buffer, bytes);
if (how == VISIBLY)
write (STDOUT_FILENO, pty_buffer, bytes);
}
/* }}} */
@ -1015,14 +1013,14 @@ static int feed_subshell (int how, int fail_on_error)
{
bytes = read (subshell_pipe[READ], subshell_cwd, MC_MAXPATHLEN+1);
if (bytes == -1)
if (bytes <= 0)
{
tcsetattr (STDOUT_FILENO, TCSANOW, &shell_mode);
perror ("\n"__FILE__": read (subshell_pipe[READ]...)");
exit (1);
}
if (bytes >= 1)
subshell_cwd[bytes-1] = 0; /* Squash the final '\n' */
subshell_cwd[bytes-1] = 0; /* Squash the final '\n' */
synchronize ();
@ -1041,7 +1039,7 @@ static int feed_subshell (int how, int fail_on_error)
{
bytes = read (STDIN_FILENO, pty_buffer, pty_buffer_size);
if (bytes == -1)
if (bytes <= 0)
{
tcsetattr (STDOUT_FILENO, TCSANOW, &shell_mode);
perror ("\n"__FILE__": read (STDIN_FILENO, pty_buffer...)");