Updated from ../gpl2lgpl.sed /home/gd/gnu/lib/error.c

1 files changed, 224 insertions, 0 deletions

diff --git a/libio/iopopen.c b/libio/iopopen.c
new file mode 100644
index 0000000..349a4cc
--- /dev/null
+++ b/libio/iopopen.c
@@ -0,0 +1,224 @@
+/*
+Copyright (C) 1993 Free Software Foundation
+
+This file is part of the GNU IO Library.  This library is free
+software; you can redistribute it and/or modify it under the
+terms of the GNU General Public License as published by the
+Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+This library is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this library; see the file COPYING.  If not, write to the Free
+Software Foundation, 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+
+As a special exception, if you link this library with files
+compiled with a GNU compiler to produce an executable, this does not cause
+the resulting executable to be covered by the GNU General Public License.
+This exception does not however invalidate any other reasons why
+the executable file might be covered by the GNU General Public License. */
+
+/*  written by Per Bothner (bothner@cygnus.com) */
+
+#define _POSIX_SOURCE
+#include "libioP.h"
+#if _IO_HAVE_SYS_WAIT
+#include <signal.h>
+#include <unistd.h>
+#ifdef __STDC__
+#include <stdlib.h>
+#endif
+#include <sys/types.h>
+#include <sys/wait.h>
+
+#ifndef _IO_fork
+#define _IO_fork vfork /* defined in libiberty, if needed */
+_IO_pid_t _IO_fork();
+#endif
+
+#endif /* _IO_HAVE_SYS_WAIT */
+
+#ifndef _IO_pipe
+#define _IO_pipe pipe
+extern int _IO_pipe();
+#endif
+
+#ifndef _IO_dup2
+#define _IO_dup2 dup2
+extern int _IO_dup2();
+#endif
+
+#ifndef _IO_waitpid
+#define _IO_waitpid waitpid
+#endif
+
+#ifndef _IO_execl
+#define _IO_execl execl
+#endif
+#ifndef _IO__exit
+#define _IO__exit _exit
+#endif
+
+struct _IO_proc_file
+{
+  struct _IO_FILE_plus file;
+  /* Following fields must match those in class procbuf (procbuf.h) */
+  _IO_pid_t pid;
+  struct _IO_proc_file *next;
+};
+typedef struct _IO_proc_file _IO_proc_file;
+
+static struct _IO_proc_file *proc_file_chain = NULL;
+
+_IO_FILE *
+DEFUN(_IO_proc_open, (fp, command, mode),
+      _IO_FILE* fp AND const char *command AND const char *mode)
+{
+#if _IO_HAVE_SYS_WAIT
+  int read_or_write;
+  int pipe_fds[2];
+  int parent_end, child_end;
+  _IO_pid_t child_pid;
+  if (_IO_file_is_open(fp))
+    return NULL;
+  if (_IO_pipe(pipe_fds) < 0)
+    return NULL;
+  if (mode[0] == 'r')
+    {
+      parent_end = pipe_fds[0];
+      child_end = pipe_fds[1];
+      read_or_write = _IO_NO_WRITES;
+    }
+  else
+    {
+      parent_end = pipe_fds[1];
+      child_end = pipe_fds[0];
+      read_or_write = _IO_NO_READS;
+    }
+  ((_IO_proc_file*)fp)->pid = child_pid = _IO_fork();
+  if (child_pid == 0)
+    {
+      int child_std_end = mode[0] == 'r' ? 1 : 0;
+      _IO_close(parent_end);
+      if (child_end != child_std_end)
+	{
+	  _IO_dup2(child_end, child_std_end);
+	  _IO_close(child_end);
+	}
+      /* Posix.2:  "popen() shall ensure that any streams from previous
+         popen() calls that remain open in the parent process are closed
+	 in the new child process." */
+      while (proc_file_chain)
+	{
+	  _IO_close (_IO_fileno ((_IO_FILE *) proc_file_chain));
+	  proc_file_chain = proc_file_chain->next;
+	}
+
+      _IO_execl("/bin/sh", "sh", "-c", command, NULL);
+      _IO__exit(127);
+    }
+  _IO_close(child_end);
+  if (child_pid < 0)
+    {
+      _IO_close(parent_end);
+      return NULL;
+    }
+  _IO_fileno(fp) = parent_end;
+
+  /* Link into proc_file_chain. */
+  ((_IO_proc_file*)fp)->next = proc_file_chain;
+  proc_file_chain = (_IO_proc_file*)fp;
+
+  _IO_mask_flags (fp, read_or_write, _IO_NO_READS|_IO_NO_WRITES);
+  return fp;
+#else /* !_IO_HAVE_SYS_WAIT */
+  return NULL;
+#endif
+}
+
+_IO_FILE *
+DEFUN(_IO_popen, (command, mode),
+      const char *command AND const char *mode)
+{
+  _IO_proc_file *fpx = (_IO_proc_file*)malloc(sizeof(_IO_proc_file));
+  _IO_FILE *fp = (_IO_FILE*)fpx;
+  if (fp == NULL)
+    return NULL;
+  _IO_init(fp, 0);
+  _IO_JUMPS(fp) = &_IO_proc_jumps;
+  _IO_file_init(fp);
+#if  !_IO_UNIFIED_JUMPTABLES
+  ((struct _IO_FILE_plus*)fp)->vtable = NULL;
+#endif
+  if (_IO_proc_open (fp, command, mode) != NULL)
+    return fp;
+  free (fpx);
+  return NULL;
+}
+
+strong_alias (_IO_popen, popen);
+
+int
+DEFUN(_IO_proc_close, (fp),
+      _IO_FILE *fp)
+{
+  /* This is not name-space clean. FIXME! */
+#if _IO_HAVE_SYS_WAIT
+  int wstatus;
+  _IO_proc_file **ptr = &proc_file_chain;
+  _IO_pid_t wait_pid;
+  int status = -1;
+
+  /* Unlink from proc_file_chain. */
+  for ( ; *ptr != NULL; ptr = &(*ptr)->next)
+    {
+      if (*ptr == (_IO_proc_file*)fp)
+	{
+	  *ptr = (*ptr)->next;
+	  status = 0;
+	  break;
+	}
+    }
+
+  if (status < 0 || _IO_close(_IO_fileno(fp)) < 0)
+    return -1;
+  /* POSIX.2 Rationale:  "Some historical implementations either block
+     or ignore the signals SIGINT, SIGQUIT, and SIGHUP while waiting
+     for the child process to terminate.  Since this behavior is not
+     described in POSIX.2, such implementations are not conforming." */
+  do
+    {
+      wait_pid = _IO_waitpid (((_IO_proc_file*)fp)->pid, &wstatus, 0);
+    } while (wait_pid == -1 && errno == EINTR);
+  if (wait_pid == -1)
+    return -1;
+  return wstatus;
+#else /* !_IO_HAVE_SYS_WAIT */
+  return -1;
+#endif
+}
+
+struct _IO_jump_t _IO_proc_jumps = {
+  JUMP_INIT_DUMMY,
+  JUMP_INIT(finish, _IO_file_finish),
+  JUMP_INIT(overflow, _IO_file_overflow),
+  JUMP_INIT(underflow, _IO_file_underflow),
+  JUMP_INIT(uflow, _IO_default_uflow),
+  JUMP_INIT(pbackfail, _IO_default_pbackfail),
+  JUMP_INIT(xsputn, _IO_file_xsputn),
+  JUMP_INIT(xsgetn, _IO_default_xsgetn),
+  JUMP_INIT(seekoff, _IO_file_seekoff),
+  JUMP_INIT(seekpos, _IO_default_seekpos),
+  JUMP_INIT(setbuf, _IO_file_setbuf),
+  JUMP_INIT(sync, _IO_file_sync),
+  JUMP_INIT(doallocate, _IO_file_doallocate),
+  JUMP_INIT(read, _IO_file_read),
+  JUMP_INIT(write, _IO_file_write),
+  JUMP_INIT(seek, _IO_file_seek),
+  JUMP_INIT(close, _IO_proc_close),
+  JUMP_INIT(stat, _IO_file_stat)
+};