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-rw-r--r--libio/iopopen.c330
1 files changed, 0 insertions, 330 deletions
diff --git a/libio/iopopen.c b/libio/iopopen.c
deleted file mode 100644
index b78e7e5ef2..0000000000
--- a/libio/iopopen.c
+++ /dev/null
@@ -1,330 +0,0 @@
-/* Copyright (C) 1993-2017 Free Software Foundation, Inc.
- This file is part of the GNU C Library.
- Written by Per Bothner <bothner@cygnus.com>.
-
- The GNU C Library is free software; you can redistribute it and/or
- modify it under the terms of the GNU Lesser General Public
- License as published by the Free Software Foundation; either
- version 2.1 of the License, or (at your option) any later version.
-
- The GNU C 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
- Lesser General Public License for more details.
-
- You should have received a copy of the GNU Lesser General Public
- License along with the GNU C Library; if not, see
- <http://www.gnu.org/licenses/>.
-
- As a special exception, if you link the code in this file with
- files compiled with a GNU compiler to produce an executable,
- that does not cause the resulting executable to be covered by
- the GNU Lesser General Public License. This exception does not
- however invalidate any other reasons why the executable file
- might be covered by the GNU Lesser General Public License.
- This exception applies to code released by its copyright holders
- in files containing the exception. */
-
-#ifndef _POSIX_SOURCE
-# define _POSIX_SOURCE
-#endif
-#include "libioP.h"
-#include <fcntl.h>
-#include <signal.h>
-#include <unistd.h>
-#include <stdlib.h>
-#ifdef _LIBC
-# include <shlib-compat.h>
-# include <not-cancel.h>
-#endif
-#include <sys/types.h>
-#include <sys/wait.h>
-#include <kernel-features.h>
-
-#ifndef _IO_fork
-#ifdef _LIBC
-#define _IO_fork __fork
-#else
-#define _IO_fork fork /* defined in libiberty, if needed */
-#endif
-extern _IO_pid_t _IO_fork (void) __THROW;
-#endif
-
-#ifndef _IO_dup2
-#ifdef _LIBC
-#define _IO_dup2 __dup2
-#else
-#define _IO_dup2 dup2
-#endif
-extern int _IO_dup2 (int fd, int fd2) __THROW;
-#endif
-
-#ifndef _IO_waitpid
-#ifdef _LIBC
-#define _IO_waitpid waitpid_not_cancel
-#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_not_cancel
-#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 const struct _IO_jump_t _IO_proc_jumps;
-
-static struct _IO_proc_file *proc_file_chain;
-
-#ifdef _IO_MTSAFE_IO
-static _IO_lock_t proc_file_chain_lock = _IO_lock_initializer;
-
-static void
-unlock (void *not_used)
-{
- _IO_lock_unlock (proc_file_chain_lock);
-}
-#endif
-
-_IO_FILE *
-_IO_new_proc_open (_IO_FILE *fp, const char *command, const char *mode)
-{
- int read_or_write;
- int parent_end, child_end;
- int pipe_fds[2];
- _IO_pid_t child_pid;
-
- int do_read = 0;
- int do_write = 0;
- int do_cloexec = 0;
- while (*mode != '\0')
- switch (*mode++)
- {
- case 'r':
- do_read = 1;
- break;
- case 'w':
- do_write = 1;
- break;
- case 'e':
- do_cloexec = 1;
- break;
- default:
- errout:
- __set_errno (EINVAL);
- return NULL;
- }
-
- if ((do_read ^ do_write) == 0)
- goto errout;
-
- if (_IO_file_is_open (fp))
- return NULL;
-
- /* Atomically set the O_CLOEXEC flag for the pipe end used by the
- child process (to avoid leaking the file descriptor in case of a
- concurrent fork). This is later reverted in the child process.
- When popen returns, the parent pipe end can be O_CLOEXEC or not,
- depending on the 'e' open mode, but there is only one flag which
- controls both descriptors. The parent end is adjusted below,
- after creating the child process. (In the child process, the
- parent end should be closed on execve, so O_CLOEXEC remains set
- there.) */
- if (__pipe2 (pipe_fds, O_CLOEXEC) < 0)
- return NULL;
-
- if (do_read)
- {
- 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 = do_read ? 1 : 0;
- struct _IO_proc_file *p;
-
- if (child_end != child_std_end)
- _IO_dup2 (child_end, child_std_end);
- else
- /* The descriptor is already the one we will use. But it must
- not be marked close-on-exec. Undo the effects. */
- __fcntl (child_end, F_SETFD, 0);
- /* 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." */
- for (p = proc_file_chain; p; p = p->next)
- {
- 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);
- }
- _IO_close (child_end);
- if (child_pid < 0)
- {
- _IO_close (parent_end);
- return NULL;
- }
-
- if (!do_cloexec)
- /* Undo the effects of the pipe2 call which set the
- close-on-exec flag. */
- __fcntl (parent_end, F_SETFD, 0);
-
- _IO_fileno (fp) = parent_end;
-
- /* Link into proc_file_chain. */
-#ifdef _IO_MTSAFE_IO
- _IO_cleanup_region_start_noarg (unlock);
- _IO_lock_lock (proc_file_chain_lock);
-#endif
- ((_IO_proc_file *) fp)->next = proc_file_chain;
- proc_file_chain = (_IO_proc_file *) fp;
-#ifdef _IO_MTSAFE_IO
- _IO_lock_unlock (proc_file_chain_lock);
- _IO_cleanup_region_end (0);
-#endif
-
- _IO_mask_flags (fp, read_or_write, _IO_NO_READS|_IO_NO_WRITES);
- return fp;
-}
-
-_IO_FILE *
-_IO_new_popen (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_internal (fp, 0);
- _IO_JUMPS (&new_f->fpx.file) = &_IO_proc_jumps;
- _IO_new_file_init_internal (&new_f->fpx.file);
-#if !_IO_UNIFIED_JUMPTABLES
- new_f->fpx.file.vtable = NULL;
-#endif
- if (_IO_new_proc_open (fp, command, mode) != NULL)
- return (_IO_FILE *) &new_f->fpx.file;
- _IO_un_link (&new_f->fpx.file);
- free (new_f);
- return NULL;
-}
-
-int
-_IO_new_proc_close (_IO_FILE *fp)
-{
- /* This is not name-space clean. FIXME! */
- int wstatus;
- _IO_proc_file **ptr = &proc_file_chain;
- _IO_pid_t wait_pid;
- int status = -1;
-
- /* Unlink from proc_file_chain. */
-#ifdef _IO_MTSAFE_IO
- _IO_cleanup_region_start_noarg (unlock);
- _IO_lock_lock (proc_file_chain_lock);
-#endif
- for ( ; *ptr != NULL; ptr = &(*ptr)->next)
- {
- if (*ptr == (_IO_proc_file *) fp)
- {
- *ptr = (*ptr)->next;
- status = 0;
- break;
- }
- }
-#ifdef _IO_MTSAFE_IO
- _IO_lock_unlock (proc_file_chain_lock);
- _IO_cleanup_region_end (0);
-#endif
-
- 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;
-}
-
-static const struct _IO_jump_t _IO_proc_jumps libio_vtable = {
- JUMP_INIT_DUMMY,
- JUMP_INIT(finish, _IO_new_file_finish),
- JUMP_INIT(overflow, _IO_new_file_overflow),
- JUMP_INIT(underflow, _IO_new_file_underflow),
- JUMP_INIT(uflow, _IO_default_uflow),
- JUMP_INIT(pbackfail, _IO_default_pbackfail),
- JUMP_INIT(xsputn, _IO_new_file_xsputn),
- JUMP_INIT(xsgetn, _IO_default_xsgetn),
- JUMP_INIT(seekoff, _IO_new_file_seekoff),
- JUMP_INIT(seekpos, _IO_default_seekpos),
- JUMP_INIT(setbuf, _IO_new_file_setbuf),
- JUMP_INIT(sync, _IO_new_file_sync),
- JUMP_INIT(doallocate, _IO_file_doallocate),
- JUMP_INIT(read, _IO_file_read),
- JUMP_INIT(write, _IO_new_file_write),
- JUMP_INIT(seek, _IO_file_seek),
- JUMP_INIT(close, _IO_new_proc_close),
- JUMP_INIT(stat, _IO_file_stat),
- JUMP_INIT(showmanyc, _IO_default_showmanyc),
- JUMP_INIT(imbue, _IO_default_imbue)
-};
-
-strong_alias (_IO_new_popen, __new_popen)
-versioned_symbol (libc, _IO_new_popen, _IO_popen, GLIBC_2_1);
-versioned_symbol (libc, __new_popen, popen, GLIBC_2_1);
-versioned_symbol (libc, _IO_new_proc_open, _IO_proc_open, GLIBC_2_1);
-versioned_symbol (libc, _IO_new_proc_close, _IO_proc_close, GLIBC_2_1);
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-10 18:38:49 +0000