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Age	Commit message (Expand)	Author	Files	Lines
2014-04-30	Move ports/ChangeLog* files to ChangeLog.old-ports*, remove ports/ directory.	Roland McGrath	1	-0/+1282

/* Copyright (C) 1993-2015 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 <signal.h> #include <unistd.h> #include <stdlib.h> #ifdef _LIBC # include <unistd.h> # 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 (fp, command, mode) _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; #ifdef O_CLOEXEC # ifndef __ASSUME_PIPE2 if (__have_pipe2 >= 0) # endif { int r = __pipe2 (pipe_fds, O_CLOEXEC); # ifndef __ASSUME_PIPE2 if (__have_pipe2 == 0) __have_pipe2 = r != -1 || errno != ENOSYS ? 1 : -1; if (__have_pipe2 > 0) # endif if (r < 0) return NULL; } #endif #ifndef __ASSUME_PIPE2 # ifdef O_CLOEXEC if (__have_pipe2 < 0) # endif if (__pipe (pipe_fds) < 0) return NULL; #endif 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; #ifndef __ASSUME_PIPE2 /* If we have pipe2 the descriptor is marked for close-on-exec. */ _IO_close (parent_end); #endif if (child_end != child_std_end) { _IO_dup2 (child_end, child_std_end); #ifndef __ASSUME_PIPE2 _IO_close (child_end); #endif } #ifdef O_CLOEXEC else { /* The descriptor is already the one we will use. But it must not be marked close-on-exec. Undo the effects. */ # ifndef __ASSUME_PIPE2 if (__have_pipe2 > 0) # endif __fcntl (child_end, F_SETFD, 0); } #endif /* 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) { #ifndef __ASSUME_PIPE2 # ifdef O_CLOEXEC if (__have_pipe2 < 0) # endif __fcntl (parent_end, F_SETFD, FD_CLOEXEC); #endif } else { #ifdef O_CLOEXEC /* Undo the effects of the pipe2 call which set the close-on-exec flag. */ # ifndef __ASSUME_PIPE2 if (__have_pipe2 > 0) # endif __fcntl (parent_end, F_SETFD, 0); #endif } _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 (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 (&new_f->fpx.file) = &_IO_proc_jumps; _IO_new_file_init (&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 (fp) _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 = { 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);