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[/] [openrisc/] [trunk/] [gnu-old/] [gcc-4.2.2/] [libiberty/] [pex-common.h] - Blame information for rev 816

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/* 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 malloc.  */
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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_input_file.  */
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  FILE *input_file;
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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 */,
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                     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 all descriptors, 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 IN, OUT, and ERRDES are not
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     STD*_FILE_NO, they should be closed.  If the descriptor TOCLOSE
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     is not -1, and the system supports pipes, TOCLOSE should be
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     closed in the child process.  The function should handle the
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     PEX_STDERR_TO_STDOUT flag.  Return >= 0 on success, or -1 on
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     error and set *ERRMSG and *ERR.  */
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  long (*exec_child) (struct pex_obj *, int /* flags */,
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                      const char */* executable */, char * const * /* argv */,
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                      char * const * /* env */,
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                      int /* in */, int /* out */, int /* errdes */,
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                      int /* toclose */, const char **/* errmsg */,
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                      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 /* child */, int * /* status */,
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               struct pex_time * /* time */, int /* done */,
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               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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     descriptors in P[0] and P[1].  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 (*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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  /* Get a FILE pointer to write to the file descriptor FD (only
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     called if PEX_USE_PIPES is set).  If BINARY is non-zero, open in
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     binary mode.  Arrange for FD not to be inherited by the child
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     processes.  Return pointer on success, NULL on error.  */
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  FILE * (*fdopenw) (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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