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Rev | Author | Line No. | Line |
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5191 | serge | 1 | /* Utilities to execute a program in a subprocess (possibly linked by pipes |
2 | with other subprocesses), and wait for it. Shared logic. |
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3 | Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2003, 2004 |
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4 | Free Software Foundation, Inc. |
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5 | |||
6 | This file is part of the libiberty library. |
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7 | Libiberty is free software; you can redistribute it and/or |
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8 | modify it under the terms of the GNU Library General Public |
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9 | License as published by the Free Software Foundation; either |
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10 | version 2 of the License, or (at your option) any later version. |
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11 | |||
12 | Libiberty is distributed in the hope that it will be useful, |
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13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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15 | Library General Public License for more details. |
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16 | |||
17 | You should have received a copy of the GNU Library General Public |
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18 | License along with libiberty; see the file COPYING.LIB. If not, |
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19 | write to the Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor, |
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20 | Boston, MA 02110-1301, USA. */ |
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21 | |||
22 | #ifndef PEX_COMMON_H |
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23 | #define PEX_COMMON_H |
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24 | |||
25 | #include "config.h" |
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26 | #include "libiberty.h" |
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27 | #include |
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28 | |||
29 | /* pid_t is may defined by config.h or sys/types.h needs to be |
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30 | included. */ |
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31 | #if !defined(pid_t) && defined(HAVE_SYS_TYPES_H) |
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32 | #include |
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33 | #endif |
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34 | |||
35 | #define install_error_msg "installation problem, cannot exec `%s'" |
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36 | |||
37 | /* stdin file number. */ |
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38 | #define STDIN_FILE_NO 0 |
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39 | |||
40 | /* stdout file number. */ |
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41 | #define STDOUT_FILE_NO 1 |
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42 | |||
43 | /* stderr file number. */ |
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44 | #define STDERR_FILE_NO 2 |
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45 | |||
46 | /* value of `pipe': port index for reading. */ |
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47 | #define READ_PORT 0 |
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48 | |||
49 | /* value of `pipe': port index for writing. */ |
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50 | #define WRITE_PORT 1 |
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51 | |||
52 | /* The structure used by pex_init and friends. */ |
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53 | |||
54 | struct pex_obj |
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55 | { |
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56 | /* Flags. */ |
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57 | int flags; |
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58 | /* Name of calling program, for error messages. */ |
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59 | const char *pname; |
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60 | /* Base name to use for temporary files. */ |
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61 | const char *tempbase; |
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62 | /* Pipe to use as stdin for next process. */ |
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63 | int next_input; |
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64 | /* File name to use as stdin for next process. */ |
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65 | char *next_input_name; |
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66 | /* Whether next_input_name was allocated using malloc. */ |
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67 | int next_input_name_allocated; |
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68 | /* If not -1, stderr pipe from the last process. */ |
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69 | int stderr_pipe; |
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70 | /* Number of child processes. */ |
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71 | int count; |
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72 | /* PIDs of child processes; array allocated using malloc. */ |
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73 | pid_t *children; |
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74 | /* Exit statuses of child processes; array allocated using malloc. */ |
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75 | int *status; |
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76 | /* Time used by child processes; array allocated using malloc. */ |
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77 | struct pex_time *time; |
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78 | /* Number of children we have already waited for. */ |
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79 | int number_waited; |
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80 | /* FILE created by pex_input_file. */ |
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81 | FILE *input_file; |
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82 | /* FILE created by pex_read_output. */ |
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83 | FILE *read_output; |
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84 | /* FILE created by pex_read_err. */ |
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85 | FILE *read_err; |
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86 | /* Number of temporary files to remove. */ |
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87 | int remove_count; |
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88 | /* List of temporary files to remove; array allocated using malloc |
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89 | of strings allocated using malloc. */ |
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90 | char **remove; |
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91 | /* Pointers to system dependent functions. */ |
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92 | const struct pex_funcs *funcs; |
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93 | /* For use by system dependent code. */ |
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94 | void *sysdep; |
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95 | }; |
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96 | |||
97 | /* Functions passed to pex_run_common. */ |
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98 | |||
99 | struct pex_funcs |
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100 | { |
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101 | /* Open file NAME for reading. If BINARY is non-zero, open in |
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102 | binary mode. Return >= 0 on success, -1 on error. */ |
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103 | int (*open_read) (struct pex_obj *, const char */* name */, int /* binary */); |
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104 | /* Open file NAME for writing. If BINARY is non-zero, open in |
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105 | binary mode. Return >= 0 on success, -1 on error. */ |
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106 | int (*open_write) (struct pex_obj *, const char */* name */, |
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6324 | serge | 107 | int /* binary */, int /* append */); |
5191 | serge | 108 | /* Execute a child process. FLAGS, EXECUTABLE, ARGV, ERR are from |
109 | pex_run. IN, OUT, ERRDES, TOCLOSE are all descriptors, from |
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110 | open_read, open_write, or pipe, or they are one of STDIN_FILE_NO, |
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111 | STDOUT_FILE_NO or STDERR_FILE_NO; if IN, OUT, and ERRDES are not |
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112 | STD*_FILE_NO, they should be closed. If the descriptor TOCLOSE |
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113 | is not -1, and the system supports pipes, TOCLOSE should be |
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114 | closed in the child process. The function should handle the |
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115 | PEX_STDERR_TO_STDOUT flag. Return >= 0 on success, or -1 on |
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116 | error and set *ERRMSG and *ERR. */ |
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117 | pid_t (*exec_child) (struct pex_obj *, int /* flags */, |
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118 | const char */* executable */, char * const * /* argv */, |
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119 | char * const * /* env */, |
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120 | int /* in */, int /* out */, int /* errdes */, |
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121 | int /* toclose */, const char **/* errmsg */, |
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122 | int */* err */); |
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123 | /* Close a descriptor. Return 0 on success, -1 on error. */ |
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124 | int (*close) (struct pex_obj *, int); |
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125 | /* Wait for a child to complete, returning exit status in *STATUS |
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126 | and time in *TIME (if it is not null). CHILD is from fork. DONE |
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127 | is 1 if this is called via pex_free. ERRMSG and ERR are as in |
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128 | fork. Return 0 on success, -1 on error. */ |
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129 | pid_t (*wait) (struct pex_obj *, pid_t /* child */, int * /* status */, |
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130 | struct pex_time * /* time */, int /* done */, |
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131 | const char ** /* errmsg */, int * /* err */); |
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132 | /* Create a pipe (only called if PEX_USE_PIPES is set) storing two |
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133 | descriptors in P[0] and P[1]. If BINARY is non-zero, open in |
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134 | binary mode. Return 0 on success, -1 on error. */ |
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135 | int (*pipe) (struct pex_obj *, int * /* p */, int /* binary */); |
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136 | /* Get a FILE pointer to read from a file descriptor (only called if |
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137 | PEX_USE_PIPES is set). If BINARY is non-zero, open in binary |
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138 | mode. Return pointer on success, NULL on error. */ |
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139 | FILE * (*fdopenr) (struct pex_obj *, int /* fd */, int /* binary */); |
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140 | /* Get a FILE pointer to write to the file descriptor FD (only |
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141 | called if PEX_USE_PIPES is set). If BINARY is non-zero, open in |
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142 | binary mode. Arrange for FD not to be inherited by the child |
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143 | processes. Return pointer on success, NULL on error. */ |
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144 | FILE * (*fdopenw) (struct pex_obj *, int /* fd */, int /* binary */); |
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145 | /* Free any system dependent data associated with OBJ. May be |
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146 | NULL if there is nothing to do. */ |
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147 | void (*cleanup) (struct pex_obj *); |
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148 | }; |
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149 | |||
150 | extern struct pex_obj *pex_init_common (int, const char *, const char *, |
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151 | const struct pex_funcs *); |
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152 | |||
153 | #endif |