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Updated from ../gpl2lgpl.sed /home/gd/gnu/lib/error.c
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Roland McGrath
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -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) | ||
| }; |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,16 @@ | ||
| #include "libioP.h" | ||
| #include "stdio.h" | ||
| #include <errno.h> | ||
|
|
||
| int | ||
| pclose(fp) | ||
| FILE *fp; | ||
| { | ||
| #if 0 | ||
| /* Does not actually test that stream was created by popen(). Instead, | ||
| it depends on the filebuf::sys_close() virtual to Do The Right Thing. */ | ||
| if (fp is not a proc_file) | ||
| return -1; | ||
| #endif | ||
| return _IO_fclose(fp); | ||
| } |
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