1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
|
/* Implementation of the EXECUTE_COMMAND_LINE intrinsic.
Copyright (C) 2009, 2011 Free Software Foundation, Inc.
Contributed by François-Xavier Coudert.
This file is part of the GNU Fortran runtime library (libgfortran).
Libgfortran is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free
Software Foundation; either version 3, or (at your option) any later
version.
Libgfortran 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 General Public License
for more details.
Under Section 7 of GPL version 3, you are granted additional
permissions described in the GCC Runtime Library Exception, version
3.1, as published by the Free Software Foundation.
You should have received a copy of the GNU General Public License and
a copy of the GCC Runtime Library Exception along with this program;
see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
<http://www.gnu.org/licenses/>. */
#include "libgfortran.h"
#include <string.h>
#include <stdbool.h>
#include <stdlib.h>
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#ifdef HAVE_SYS_WAIT_H
#include <sys/wait.h>
#endif
enum { EXEC_SYNCHRONOUS = -2, EXEC_NOERROR = 0, EXEC_SYSTEMFAILED,
EXEC_CHILDFAILED };
static const char *cmdmsg_values[] =
{ "",
"Termination status of the command-language interpreter cannot be obtained",
"Execution of child process impossible" };
static void
set_cmdstat (int *cmdstat, int value)
{
if (cmdstat)
*cmdstat = value;
else if (value > EXEC_NOERROR)
runtime_error ("Could not execute command line");
}
static void
execute_command_line (const char *command, bool wait, int *exitstat,
int *cmdstat, char *cmdmsg,
gfc_charlen_type command_len,
gfc_charlen_type cmdmsg_len)
{
/* Transform the Fortran string to a C string. */
char cmd[command_len + 1];
memcpy (cmd, command, command_len);
cmd[command_len] = '\0';
/* Flush all I/O units before executing the command. */
flush_all_units();
#if defined(HAVE_FORK)
if (!wait)
{
/* Asynchronous execution. */
pid_t pid;
set_cmdstat (cmdstat, EXEC_NOERROR);
if ((pid = fork()) < 0)
set_cmdstat (cmdstat, EXEC_CHILDFAILED);
else if (pid == 0)
{
/* Child process. */
int res = system (cmd);
_exit (WIFEXITED(res) ? WEXITSTATUS(res) : res);
}
}
else
#endif
{
/* Synchronous execution. */
int res = system (cmd);
if (res == -1)
set_cmdstat (cmdstat, EXEC_SYSTEMFAILED);
else if (!wait)
set_cmdstat (cmdstat, EXEC_SYNCHRONOUS);
else
set_cmdstat (cmdstat, EXEC_NOERROR);
if (res != -1)
{
#if defined(WEXITSTATUS) && defined(WIFEXITED)
*exitstat = WIFEXITED(res) ? WEXITSTATUS(res) : res;
#else
*exitstat = res;
#endif
}
}
/* Now copy back to the Fortran string if needed. */
if (cmdstat && *cmdstat > EXEC_NOERROR)
{
if (cmdmsg)
fstrcpy (cmdmsg, cmdmsg_len, cmdmsg_values[*cmdstat],
strlen (cmdmsg_values[*cmdstat]));
else
runtime_error ("Failure in EXECUTE_COMMAND_LINE: %s",
cmdmsg_values[*cmdstat]);
}
}
extern void
execute_command_line_i4 (const char *command, GFC_LOGICAL_4 *wait,
GFC_INTEGER_4 *exitstat, GFC_INTEGER_4 *cmdstat,
char *cmdmsg, gfc_charlen_type command_len,
gfc_charlen_type cmdmsg_len);
export_proto(execute_command_line_i4);
void
execute_command_line_i4 (const char *command, GFC_LOGICAL_4 *wait,
GFC_INTEGER_4 *exitstat, GFC_INTEGER_4 *cmdstat,
char *cmdmsg, gfc_charlen_type command_len,
gfc_charlen_type cmdmsg_len)
{
bool w = wait ? *wait : true;
int estat, estat_initial, cstat;
if (exitstat)
estat_initial = estat = *exitstat;
execute_command_line (command, w, &estat, cmdstat ? &cstat : NULL,
cmdmsg, command_len, cmdmsg_len);
if (exitstat && estat != estat_initial)
*exitstat = estat;
if (cmdstat)
*cmdstat = cstat;
}
extern void
execute_command_line_i8 (const char *command, GFC_LOGICAL_8 *wait,
GFC_INTEGER_8 *exitstat, GFC_INTEGER_8 *cmdstat,
char *cmdmsg, gfc_charlen_type command_len,
gfc_charlen_type cmdmsg_len);
export_proto(execute_command_line_i8);
void
execute_command_line_i8 (const char *command, GFC_LOGICAL_8 *wait,
GFC_INTEGER_8 *exitstat, GFC_INTEGER_8 *cmdstat,
char *cmdmsg, gfc_charlen_type command_len,
gfc_charlen_type cmdmsg_len)
{
bool w = wait ? *wait : true;
int estat, estat_initial, cstat;
if (exitstat)
estat_initial = estat = *exitstat;
execute_command_line (command, w, &estat, cmdstat ? &cstat : NULL,
cmdmsg, command_len, cmdmsg_len);
if (exitstat && estat != estat_initial)
*exitstat = estat;
if (cmdstat)
*cmdstat = cstat;
}
|