diff options
Diffstat (limited to 'libio/iopopen.c')
| -rw-r--r-- | libio/iopopen.c | 157 |
1 files changed, 91 insertions, 66 deletions
diff --git a/libio/iopopen.c b/libio/iopopen.c index ef6ad12449f..434008609f4 100644 --- a/libio/iopopen.c +++ b/libio/iopopen.c @@ -1,55 +1,60 @@ -/* -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 +/* Copyright (C) 1993, 1997 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. */ + +#ifndef _POSIX_SOURCE +# define _POSIX_SOURCE +#endif #include "libioP.h" -#include <sys/types.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 #define _IO_fork vfork /* defined in libiberty, if needed */ -_IO_pid_t _IO_fork(); +extern _IO_pid_t _IO_fork __P ((void)); #endif #endif /* _IO_HAVE_SYS_WAIT */ #ifndef _IO_pipe #define _IO_pipe pipe -extern int _IO_pipe(); +extern int _IO_pipe __P ((int des[2])); #endif #ifndef _IO_dup2 #define _IO_dup2 dup2 -extern int _IO_dup2(); +extern int _IO_dup2 __P ((int fd, int fd2)); #endif #ifndef _IO_waitpid @@ -75,17 +80,19 @@ 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) +_IO_proc_open (fp, command, mode) + _IO_FILE *fp; + const char *command; + const char *mode; { #if _IO_HAVE_SYS_WAIT - int read_or_write; + volatile int read_or_write; + volatile int parent_end, child_end; int pipe_fds[2]; - int parent_end, child_end; _IO_pid_t child_pid; - if (_IO_file_is_open(fp)) + if (_IO_file_is_open (fp)) return NULL; - if (_IO_pipe(pipe_fds) < 0) + if (_IO_pipe (pipe_fds) < 0) return NULL; if (mode[0] == 'r') { @@ -99,17 +106,17 @@ DEFUN(_IO_proc_open, (fp, command, mode), child_end = pipe_fds[0]; read_or_write = _IO_NO_READS; } - ((_IO_proc_file*)fp)->pid = child_pid = _IO_fork(); + ((_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); + _IO_close (parent_end); if (child_end != child_std_end) { - _IO_dup2(child_end, child_std_end); - _IO_close(child_end); + _IO_dup2 (child_end, child_std_end); + _IO_close (child_end); } - /* Posix.2: "popen() shall ensure that any streams from previous + /* 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) @@ -118,20 +125,20 @@ DEFUN(_IO_proc_open, (fp, command, mode), proc_file_chain = proc_file_chain->next; } - _IO_execl("/bin/sh", "sh", "-c", command, (char *)0); - _IO__exit(127); + _IO_execl ("/bin/sh", "sh", "-c", command, (char *) 0); + _IO__exit (127); } - _IO_close(child_end); + _IO_close (child_end); if (child_pid < 0) { - _IO_close(parent_end); + _IO_close (parent_end); return NULL; } - _IO_fileno(fp) = parent_end; + _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_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; @@ -141,28 +148,45 @@ DEFUN(_IO_proc_open, (fp, command, mode), } _IO_FILE * -DEFUN(_IO_popen, (command, mode), - const char *command AND const char *mode) +_IO_popen (command, mode) + const char *command; + const char *mode; { - _IO_proc_file *fpx = (_IO_proc_file*)malloc(sizeof(_IO_proc_file)); - _IO_FILE *fp = (_IO_FILE*)fpx; - if (fp == NULL) + 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; - _IO_init(fp, 0); - _IO_JUMPS(fp) = &_IO_proc_jumps; - _IO_file_init(fp); +#ifdef _IO_MTSAFE_IO + new_f->fpx.file.file._lock = &new_f->lock; +#endif + fp = (_IO_FILE*)&new_f->fpx; + _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; + ((struct _IO_FILE_plus *) fp)->vtable = NULL; #endif if (_IO_proc_open (fp, command, mode) != NULL) return fp; - free (fpx); + free (new_f); return NULL; } +#ifdef strong_alias +strong_alias (_IO_popen, popen); +#endif + int -DEFUN(_IO_proc_close, (fp), - _IO_FILE *fp) +_IO_proc_close (fp) + _IO_FILE *fp; { /* This is not name-space clean. FIXME! */ #if _IO_HAVE_SYS_WAIT @@ -170,11 +194,11 @@ DEFUN(_IO_proc_close, (fp), _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) + if (*ptr == (_IO_proc_file *) fp) { *ptr = (*ptr)->next; status = 0; @@ -182,7 +206,7 @@ DEFUN(_IO_proc_close, (fp), } } - if (status < 0 || _IO_close(_IO_fileno(fp)) < 0) + 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 @@ -190,8 +214,9 @@ DEFUN(_IO_proc_close, (fp), 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); + 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; |