154 lines
6.1 KiB
C
154 lines
6.1 KiB
C
/* Utilities to execute a program in a subprocess (possibly linked by pipes
|
|
with other subprocesses), and wait for it. Shared logic.
|
|
Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2003, 2004
|
|
Free Software Foundation, Inc.
|
|
|
|
This file is part of the libiberty library.
|
|
Libiberty is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Library General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2 of the License, or (at your option) any later version.
|
|
|
|
Libiberty 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
|
|
Library General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Library General Public
|
|
License along with libiberty; see the file COPYING.LIB. If not,
|
|
write to the Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor,
|
|
Boston, MA 02110-1301, USA. */
|
|
|
|
#ifndef PEX_COMMON_H
|
|
#define PEX_COMMON_H
|
|
|
|
#include "config.h"
|
|
#include "libiberty.h"
|
|
#include <stdio.h>
|
|
|
|
/* pid_t is may defined by config.h or sys/types.h needs to be
|
|
included. */
|
|
#if !defined(pid_t) && defined(HAVE_SYS_TYPES_H)
|
|
#include <sys/types.h>
|
|
#endif
|
|
|
|
#define install_error_msg "installation problem, cannot exec `%s'"
|
|
|
|
/* stdin file number. */
|
|
#define STDIN_FILE_NO 0
|
|
|
|
/* stdout file number. */
|
|
#define STDOUT_FILE_NO 1
|
|
|
|
/* stderr file number. */
|
|
#define STDERR_FILE_NO 2
|
|
|
|
/* value of `pipe': port index for reading. */
|
|
#define READ_PORT 0
|
|
|
|
/* value of `pipe': port index for writing. */
|
|
#define WRITE_PORT 1
|
|
|
|
/* The structure used by pex_init and friends. */
|
|
|
|
struct pex_obj
|
|
{
|
|
/* Flags. */
|
|
int flags;
|
|
/* Name of calling program, for error messages. */
|
|
const char *pname;
|
|
/* Base name to use for temporary files. */
|
|
const char *tempbase;
|
|
/* Pipe to use as stdin for next process. */
|
|
int next_input;
|
|
/* File name to use as stdin for next process. */
|
|
char *next_input_name;
|
|
/* Whether next_input_name was allocated using malloc. */
|
|
int next_input_name_allocated;
|
|
/* If not -1, stderr pipe from the last process. */
|
|
int stderr_pipe;
|
|
/* Number of child processes. */
|
|
int count;
|
|
/* PIDs of child processes; array allocated using malloc. */
|
|
pid_t *children;
|
|
/* Exit statuses of child processes; array allocated using malloc. */
|
|
int *status;
|
|
/* Time used by child processes; array allocated using malloc. */
|
|
struct pex_time *time;
|
|
/* Number of children we have already waited for. */
|
|
int number_waited;
|
|
/* FILE created by pex_input_file. */
|
|
FILE *input_file;
|
|
/* FILE created by pex_read_output. */
|
|
FILE *read_output;
|
|
/* FILE created by pex_read_err. */
|
|
FILE *read_err;
|
|
/* Number of temporary files to remove. */
|
|
int remove_count;
|
|
/* List of temporary files to remove; array allocated using malloc
|
|
of strings allocated using malloc. */
|
|
char **remove;
|
|
/* Pointers to system dependent functions. */
|
|
const struct pex_funcs *funcs;
|
|
/* For use by system dependent code. */
|
|
void *sysdep;
|
|
};
|
|
|
|
/* Functions passed to pex_run_common. */
|
|
|
|
struct pex_funcs
|
|
{
|
|
/* Open file NAME for reading. If BINARY is non-zero, open in
|
|
binary mode. Return >= 0 on success, -1 on error. */
|
|
int (*open_read) (struct pex_obj *, const char */* name */, int /* binary */);
|
|
/* Open file NAME for writing. If BINARY is non-zero, open in
|
|
binary mode. Return >= 0 on success, -1 on error. */
|
|
int (*open_write) (struct pex_obj *, const char */* name */,
|
|
int /* binary */, int /* append */);
|
|
/* Execute a child process. FLAGS, EXECUTABLE, ARGV, ERR are from
|
|
pex_run. IN, OUT, ERRDES, TOCLOSE are all descriptors, from
|
|
open_read, open_write, or pipe, or they are one of STDIN_FILE_NO,
|
|
STDOUT_FILE_NO or STDERR_FILE_NO; if IN, OUT, and ERRDES are not
|
|
STD*_FILE_NO, they should be closed. If the descriptor TOCLOSE
|
|
is not -1, and the system supports pipes, TOCLOSE should be
|
|
closed in the child process. The function should handle the
|
|
PEX_STDERR_TO_STDOUT flag. Return >= 0 on success, or -1 on
|
|
error and set *ERRMSG and *ERR. */
|
|
pid_t (*exec_child) (struct pex_obj *, int /* flags */,
|
|
const char */* executable */, char * const * /* argv */,
|
|
char * const * /* env */,
|
|
int /* in */, int /* out */, int /* errdes */,
|
|
int /* toclose */, const char **/* errmsg */,
|
|
int */* err */);
|
|
/* Close a descriptor. Return 0 on success, -1 on error. */
|
|
int (*close) (struct pex_obj *, int);
|
|
/* Wait for a child to complete, returning exit status in *STATUS
|
|
and time in *TIME (if it is not null). CHILD is from fork. DONE
|
|
is 1 if this is called via pex_free. ERRMSG and ERR are as in
|
|
fork. Return 0 on success, -1 on error. */
|
|
pid_t (*wait) (struct pex_obj *, pid_t /* child */, int * /* status */,
|
|
struct pex_time * /* time */, int /* done */,
|
|
const char ** /* errmsg */, int * /* err */);
|
|
/* Create a pipe (only called if PEX_USE_PIPES is set) storing two
|
|
descriptors in P[0] and P[1]. If BINARY is non-zero, open in
|
|
binary mode. Return 0 on success, -1 on error. */
|
|
int (*pipe) (struct pex_obj *, int * /* p */, int /* binary */);
|
|
/* Get a FILE pointer to read from a file descriptor (only called if
|
|
PEX_USE_PIPES is set). If BINARY is non-zero, open in binary
|
|
mode. Return pointer on success, NULL on error. */
|
|
FILE * (*fdopenr) (struct pex_obj *, int /* fd */, int /* binary */);
|
|
/* Get a FILE pointer to write to the file descriptor FD (only
|
|
called if PEX_USE_PIPES is set). If BINARY is non-zero, open in
|
|
binary mode. Arrange for FD not to be inherited by the child
|
|
processes. Return pointer on success, NULL on error. */
|
|
FILE * (*fdopenw) (struct pex_obj *, int /* fd */, int /* binary */);
|
|
/* Free any system dependent data associated with OBJ. May be
|
|
NULL if there is nothing to do. */
|
|
void (*cleanup) (struct pex_obj *);
|
|
};
|
|
|
|
extern struct pex_obj *pex_init_common (int, const char *, const char *,
|
|
const struct pex_funcs *);
|
|
|
|
#endif
|