86e81e1a09
includes fixes for these 109 GCC PR's: 4520 13685 13983 17519 19505 20256 22209 22313 23454 24367 25211 25468 25519 25636 25636 26435 26504 26570 26719 26764 26881 26969 26983 26991 26991 26993 27075 27184 27226 27287 27287 27291 27334 27363 27428 27489 27490 27537 27558 27565 27566 27616 27639 27681 27697 27721 27724 27768 27793 27793 27795 27827 27878 27889 27893 28029 28075 28136 28148 28150 28162 28170 28187 28207 28207 28218 28221 28238 28243 28247 28257 28259 28267 28283 28286 28299 28386 28402 28403 28418 28473 28490 28493 28621 28634 28636 28649 28651 28677 28683 28726 28814 28825 28862 28900 28924 28946 28952 28960 28980 29006 29091 29119 29132 29154 29198 29230 29290 29323
132 lines
5.1 KiB
C
132 lines
5.1 KiB
C
/* Utilities to execute a program in a subprocess (possibly linked by pipes
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with other subprocesses), and wait for it. Shared logic.
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Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2003, 2004
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Free Software Foundation, Inc.
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This file is part of the libiberty library.
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Libiberty is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public
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License as published by the Free Software Foundation; either
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version 2 of the License, or (at your option) any later version.
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Libiberty is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with libiberty; see the file COPYING.LIB. If not,
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write to the Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor,
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Boston, MA 02110-1301, USA. */
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#ifndef PEX_COMMON_H
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#define PEX_COMMON_H
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#include "config.h"
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#include "libiberty.h"
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#include <stdio.h>
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#define install_error_msg "installation problem, cannot exec `%s'"
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/* stdin file number. */
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#define STDIN_FILE_NO 0
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/* stdout file number. */
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#define STDOUT_FILE_NO 1
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/* stderr file number. */
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#define STDERR_FILE_NO 2
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/* value of `pipe': port index for reading. */
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#define READ_PORT 0
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/* value of `pipe': port index for writing. */
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#define WRITE_PORT 1
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/* The structure used by pex_init and friends. */
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struct pex_obj
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{
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/* Flags. */
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int flags;
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/* Name of calling program, for error messages. */
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const char *pname;
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/* Base name to use for temporary files. */
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const char *tempbase;
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/* Pipe to use as stdin for next process. */
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int next_input;
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/* File name to use as stdin for next process. */
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char *next_input_name;
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/* Whether next_input_name was allocated using malloc. */
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int next_input_name_allocated;
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/* Number of child processes. */
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int count;
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/* PIDs of child processes; array allocated using maloc. */
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long *children;
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/* Exit statuses of child processes; array allocated using malloc. */
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int *status;
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/* Time used by child processes; array allocated using malloc. */
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struct pex_time *time;
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/* Number of children we have already waited for. */
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int number_waited;
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/* FILE created by pex_read_output. */
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FILE *read_output;
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/* Number of temporary files to remove. */
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int remove_count;
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/* List of temporary files to remove; array allocated using malloc
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of strings allocated using malloc. */
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char **remove;
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/* Pointers to system dependent functions. */
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const struct pex_funcs *funcs;
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/* For use by system dependent code. */
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void *sysdep;
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};
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/* Functions passed to pex_run_common. */
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struct pex_funcs
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{
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/* Open file NAME for reading. If BINARY is non-zero, open in
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binary mode. Return >= 0 on success, -1 on error. */
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int (*open_read) (struct pex_obj *, const char *name, int binary);
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/* Open file NAME for writing. If BINARY is non-zero, open in
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binary mode. Return >= 0 on success, -1 on error. */
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int (*open_write) (struct pex_obj *, const char *name, int binary);
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/* Execute a child process. FLAGS, EXECUTABLE, ARGV, ERR are from
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pex_run. IN, OUT, ERRDES, TOCLOSE are each a descriptor, from
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open_read, open_write, or pipe, or they are one of STDIN_FILE_NO,
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STDOUT_FILE_NO or STDERR_FILE_NO; if not STD*_FILE_NO, they
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should be closed. If the descriptor TOCLOSE is not -1, and the
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system supports pipes, TOCLOSE should be closed in the child
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process. The function should handle the PEX_STDERR_TO_STDOUT
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flag. Return >= 0 on success, or -1 on error and set *ERRMSG and
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*ERR. */
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long (*exec_child) (struct pex_obj *, int flags, const char *executable,
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char * const * argv, int in, int out, int errdes,
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int /* toclose */, const char **errmsg, int *err);
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/* Close a descriptor. Return 0 on success, -1 on error. */
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int (*close) (struct pex_obj *, int);
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/* Wait for a child to complete, returning exit status in *STATUS
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and time in *TIME (if it is not null). CHILD is from fork. DONE
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is 1 if this is called via pex_free. ERRMSG and ERR are as in
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fork. Return 0 on success, -1 on error. */
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int (*wait) (struct pex_obj *, long, int *status, struct pex_time *time,
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int done, const char **errmsg, int *err);
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/* Create a pipe (only called if PEX_USE_PIPES is set) storing two
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descriptin in *P. If BINARY is non-zero, open in binary mode.
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Return 0 on success, -1 on error. */
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int (*pipe) (struct pex_obj *, int *p, int binary);
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/* Get a FILE pointer to read from a file descriptor (only called if
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PEX_USE_PIPES is set). If BINARY is non-zero, open in binary
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mode. Return pointer on success, NULL on error. */
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FILE * (*fdopenr) (struct pex_obj *, int fd, int binary);
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/* Free any system dependent data associated with OBJ. May be
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NULL if there is nothing to do. */
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void (*cleanup) (struct pex_obj *);
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};
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extern struct pex_obj *pex_init_common (int, const char *, const char *,
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const struct pex_funcs *);
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#endif
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