| /* 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> |
| |
| #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; |
| /* Number of child processes. */ |
| int count; |
| /* PIDs of child processes; array allocated using maloc. */ |
| long *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_read_output. */ |
| FILE *read_output; |
| /* 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); |
| /* Execute a child process. FLAGS, EXECUTABLE, ARGV, ERR are from |
| pex_run. IN, OUT, ERRDES are each a descriptor, from open_read, |
| open_write, or pipe, or they are one of STDIN_FILE_NO, |
| STDOUT_FILE_NO or STDERR_FILE_NO; if not STD*_FILE_NO, they |
| should be closed. The function should handle the |
| PEX_STDERR_TO_STDOUT flag. Return >= 0 on success, or -1 on |
| error and set *ERRMSG and *ERR. */ |
| long (*exec_child) (struct pex_obj *, int flags, const char *executable, |
| char * const * argv, int in, int out, int errdes, |
| 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. */ |
| int (*wait) (struct pex_obj *, long, 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 |
| descriptin in *P. 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); |
| /* 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 |