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-rw-r--r--libio/oldiopopen.c282
1 files changed, 282 insertions, 0 deletions
diff --git a/libio/oldiopopen.c b/libio/oldiopopen.c
new file mode 100644
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--- /dev/null
+++ b/libio/oldiopopen.c
@@ -0,0 +1,282 @@
+/* Copyright (C) 1998 Free Software Foundation, Inc.
+ This file is part of the GNU IO Library.
+ Written by Per Bothner <bothner@cygnus.com>.
+
+ 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. */
+
+#define _IO_USE_OLD_IO_FILE
+#ifndef _POSIX_SOURCE
+# define _POSIX_SOURCE
+#endif
+#include "libioP.h"
+#if _IO_HAVE_SYS_WAIT
+#include <signal.h>
+#include <unistd.h>
+#ifdef __STDC__
+#include <stdlib.h>
+#endif
+#ifdef _LIBC
+# include <unistd.h>
+#endif
+#include <sys/types.h>
+#include <sys/wait.h>
+
+#ifndef _IO_fork
+#ifdef _LIBC
+#define _IO_fork __vfork
+#else
+#define _IO_fork vfork /* defined in libiberty, if needed */
+#endif
+extern _IO_pid_t _IO_fork __P ((void));
+#endif
+
+#endif /* _IO_HAVE_SYS_WAIT */
+
+#ifndef _IO_pipe
+#ifdef _LIBC
+#define _IO_pipe __pipe
+#else
+#define _IO_pipe pipe
+#endif
+extern int _IO_pipe __P ((int des[2]));
+#endif
+
+#ifndef _IO_dup2
+#ifdef _LIBC
+#define _IO_dup2 __dup2
+#else
+#define _IO_dup2 dup2
+#endif
+extern int _IO_dup2 __P ((int fd, int fd2));
+#endif
+
+#ifndef _IO_waitpid
+#ifdef _LIBC
+#define _IO_waitpid __waitpid
+#else
+#define _IO_waitpid waitpid
+#endif
+#endif
+
+#ifndef _IO_execl
+#define _IO_execl execl
+#endif
+#ifndef _IO__exit
+#define _IO__exit _exit
+#endif
+
+#ifndef _IO_close
+#ifdef _LIBC
+#define _IO_close __close
+#else
+#define _IO_close close
+#endif
+#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 *old_proc_file_chain = NULL;
+
+_IO_FILE *
+_IO_old_proc_open (fp, command, mode)
+ _IO_FILE *fp;
+ const char *command;
+ const char *mode;
+{
+#if _IO_HAVE_SYS_WAIT
+ volatile int read_or_write;
+ volatile int parent_end, child_end;
+ int pipe_fds[2];
+ _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' && mode[1] == '\0')
+ {
+ parent_end = pipe_fds[0];
+ child_end = pipe_fds[1];
+ read_or_write = _IO_NO_WRITES;
+ }
+ else if (mode[0] == 'w' && mode[1] == '\0')
+ {
+ parent_end = pipe_fds[1];
+ child_end = pipe_fds[0];
+ read_or_write = _IO_NO_READS;
+ }
+ else
+ {
+ __set_errno (EINVAL);
+ return NULL;
+ }
+ ((_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 (old_proc_file_chain)
+ {
+ _IO_close (_IO_fileno ((_IO_FILE *) old_proc_file_chain));
+ old_proc_file_chain = old_proc_file_chain->next;
+ }
+
+ _IO_execl ("/bin/sh", "sh", "-c", command, (char *) 0);
+ _IO__exit (127);
+ }
+ _IO_close (child_end);
+ if (child_pid < 0)
+ {
+ _IO_close (parent_end);
+ return NULL;
+ }
+ _IO_fileno (fp) = parent_end;
+
+ /* Link into old_proc_file_chain. */
+ ((_IO_proc_file *) fp)->next = old_proc_file_chain;
+ old_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 *
+_IO_old_popen (command, mode)
+ const char *command;
+ const char *mode;
+{
+ struct locked_FILE
+ {
+ struct _IO_proc_file fpx;
+#ifdef _IO_MTSAFE_IO
+ _IO_lock_t lock;
+#endif
+ } *new_f;
+ _IO_FILE *fp;
+
+ new_f = (struct locked_FILE *) malloc (sizeof (struct locked_FILE));
+ if (new_f == NULL)
+ return NULL;
+#ifdef _IO_MTSAFE_IO
+ new_f->fpx.file.file._lock = &new_f->lock;
+#endif
+ fp = &new_f->fpx.file.file;
+ _IO_init (fp, 0);
+ _IO_JUMPS (fp) = &_IO_old_proc_jumps;
+ _IO_old_file_init (fp);
+#if !_IO_UNIFIED_JUMPTABLES
+ new_f->fpx.file.vtable = NULL;
+#endif
+ if (_IO_old_proc_open (fp, command, mode) != NULL)
+ return fp;
+ _IO_un_link (fp);
+ free (new_f);
+ return NULL;
+}
+
+int
+_IO_old_proc_close (fp)
+ _IO_FILE *fp;
+{
+ /* This is not name-space clean. FIXME! */
+#if _IO_HAVE_SYS_WAIT
+ int wstatus;
+ _IO_proc_file **ptr = &old_proc_file_chain;
+ _IO_pid_t wait_pid;
+ int status = -1;
+
+ /* Unlink from old_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_old_proc_jumps = {
+ JUMP_INIT_DUMMY,
+ JUMP_INIT(finish, _IO_old_file_finish),
+ JUMP_INIT(overflow, _IO_old_file_overflow),
+ JUMP_INIT(underflow, _IO_old_file_underflow),
+ JUMP_INIT(uflow, _IO_default_uflow),
+ JUMP_INIT(pbackfail, _IO_default_pbackfail),
+ JUMP_INIT(xsputn, _IO_old_file_xsputn),
+ JUMP_INIT(xsgetn, _IO_default_xsgetn),
+ JUMP_INIT(seekoff, _IO_old_file_seekoff),
+ JUMP_INIT(seekpos, _IO_default_seekpos),
+ JUMP_INIT(setbuf, _IO_old_file_setbuf),
+ JUMP_INIT(sync, _IO_old_file_sync),
+ JUMP_INIT(doallocate, _IO_file_doallocate),
+ JUMP_INIT(read, _IO_file_read),
+ JUMP_INIT(write, _IO_old_file_write),
+ JUMP_INIT(seek, _IO_file_seek),
+ JUMP_INIT(close, _IO_old_proc_close),
+ JUMP_INIT(stat, _IO_file_stat),
+ JUMP_INIT(showmanyc, _IO_default_showmanyc),
+ JUMP_INIT(imbue, _IO_default_imbue)
+};
+
+strong_alias (_IO_old_popen, __old_popen)
+symbol_version (_IO_old_popen, _IO_popen, GLIBC_2.0);
+symbol_version (__old_popen, popen, GLIBC_2.0);
+symbol_version (_IO_old_proc_open, _IO_proc_open, GLIBC_2.0);
+symbol_version (_IO_old_proc_close, _IO_proc_close, GLIBC_2.0);
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-16 16:02:01 +0000