1 /* Utilities to execute a program in a subprocess (possibly linked by pipes
2 with other subprocesses), and wait for it. Shared logic.
3 Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2003, 2004
4 Free Software Foundation, Inc.
6 This file is part of the libiberty library.
7 Libiberty is free software; you can redistribute it and/or
8 modify it under the terms of the GNU Library General Public
9 License as published by the Free Software Foundation; either
10 version 2 of the License, or (at your option) any later version.
12 Libiberty is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 Library General Public License for more details.
17 You should have received a copy of the GNU Library General Public
18 License along with libiberty; see the file COPYING.LIB. If not,
19 write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
26 #include "libiberty.h"
29 #define install_error_msg "installation problem, cannot exec `%s'"
31 /* stdin file number. */
32 #define STDIN_FILE_NO 0
34 /* stdout file number. */
35 #define STDOUT_FILE_NO 1
37 /* stderr file number. */
38 #define STDERR_FILE_NO 2
40 /* value of `pipe': port index for reading. */
43 /* value of `pipe': port index for writing. */
46 /* The structure used by pex_init and friends. */
52 /* Name of calling program, for error messages. */
54 /* Base name to use for temporary files. */
56 /* Pipe to use as stdin for next process. */
58 /* File name to use as stdin for next process. */
59 char *next_input_name
;
60 /* Whether next_input_name was allocated using malloc. */
61 int next_input_name_allocated
;
62 /* Number of child processes. */
64 /* PIDs of child processes; array allocated using maloc. */
66 /* Exit statuses of child processes; array allocated using malloc. */
68 /* Time used by child processes; array allocated using malloc. */
69 struct pex_time
*time
;
70 /* Number of children we have already waited for. */
72 /* FILE created by pex_read_output. */
74 /* Number of temporary files to remove. */
76 /* List of temporary files to remove; array allocated using malloc
77 of strings allocated using malloc. */
79 /* Pointers to system dependent functions. */
80 const struct pex_funcs
*funcs
;
81 /* For use by system dependent code. */
85 /* Functions passed to pex_run_common. */
89 /* Open file NAME for reading. If BINARY is non-zero, open in
90 binary mode. Return >= 0 on success, -1 on error. */
91 int (*open_read
) (struct pex_obj
*, const char *name
, int binary
);
92 /* Open file NAME for writing. If BINARY is non-zero, open in
93 binary mode. Return >= 0 on success, -1 on error. */
94 int (*open_write
) (struct pex_obj
*, const char *name
, int binary
);
95 /* Execute a child process. FLAGS, EXECUTABLE, ARGV, ERR are from
96 pex_run. IN, OUT, ERRDES are each a descriptor, from open_read,
97 open_write, or pipe, or they are one of STDIN_FILE_NO,
98 STDOUT_FILE_NO or STDERR_FILE_NO; if not STD*_FILE_NO, they
99 should be closed. The function should handle the
100 PEX_STDERR_TO_STDOUT flag. Return >= 0 on success, or -1 on
101 error and set *ERRMSG and *ERR. */
102 long (*exec_child
) (struct pex_obj
*, int flags
, const char *executable
,
103 char * const * argv
, int in
, int out
, int errdes
,
104 const char **errmsg
, int *err
);
105 /* Close a descriptor. Return 0 on success, -1 on error. */
106 int (*close
) (struct pex_obj
*, int);
107 /* Wait for a child to complete, returning exit status in *STATUS
108 and time in *TIME (if it is not null). CHILD is from fork. DONE
109 is 1 if this is called via pex_free. ERRMSG and ERR are as in
110 fork. Return 0 on success, -1 on error. */
111 int (*wait
) (struct pex_obj
*, long, int *status
, struct pex_time
*time
,
112 int done
, const char **errmsg
, int *err
);
113 /* Create a pipe (only called if PEX_USE_PIPES is set) storing two
114 descriptin in *P. If BINARY is non-zero, open in binary mode.
115 Return 0 on success, -1 on error. */
116 int (*pipe
) (struct pex_obj
*, int *p
, int binary
);
117 /* Get a FILE pointer to read from a file descriptor (only called if
118 PEX_USE_PIPES is set). If BINARY is non-zero, open in binary
119 mode. Return pointer on success, NULL on error. */
120 FILE * (*fdopenr
) (struct pex_obj
*, int fd
, int binary
);
121 /* Free any system dependent data associated with OBJ. May be
122 NULL if there is nothing to do. */
123 void (*cleanup
) (struct pex_obj
*);
126 extern struct pex_obj
*pex_init_common (int, const char *, const char *,
127 const struct pex_funcs
*);