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(_IO_new_proc_open): Don't close child_std_end if one of proc_file_chain streams has that fileno.

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This commit is contained in:
Ulrich Drepper 2007-07-19 17:02:07 +00:00
parent 2e2efe652a
commit d8d7feefa7
1 changed files with 11 additions and 2 deletions
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13
libio/iopopen.c
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@ -1,4 +1,5 @@
/* Copyright (C) 1993, 1997-2002, 2003, 2004 Free Software Foundation, Inc.
/* Copyright (C) 1993, 1997-2002, 2003, 2004, 2007
Free Software Foundation, Inc.
This file is part of the GNU C Library.
Written by Per Bothner <bothner@cygnus.com>.
@ -169,7 +170,15 @@ _IO_new_proc_open (fp, command, mode)
popen() calls that remain open in the parent process are closed
in the new child process." */
for (p = proc_file_chain; p; p = p->next)
_IO_close (_IO_fileno ((_IO_FILE *) p));
{
int fd = _IO_fileno ((_IO_FILE *) p);
/* If any stream from previous popen() calls has fileno
child_std_end, it has been already closed by the dup2 syscall
above. */
if (fd != child_std_end)
_IO_close (fd);
}
_IO_execl ("/bin/sh", "sh", "-c", command, (char *) 0);
_IO__exit (127);