1 /* Implementation of the EXECUTE_COMMAND_LINE intrinsic.
2 Copyright (C) 2009-2017 Free Software Foundation, Inc.
3 Contributed by François-Xavier Coudert.
5 This file is part of the GNU Fortran runtime library (libgfortran).
7 Libgfortran is free software; you can redistribute it and/or modify it under
8 the terms of the GNU General Public License as published by the Free
9 Software Foundation; either version 3, or (at your option) any later
12 Libgfortran is distributed in the hope that it will be useful, but WITHOUT
13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
17 Under Section 7 of GPL version 3, you are granted additional
18 permissions described in the GCC Runtime Library Exception, version
19 3.1, as published by the Free Software Foundation.
21 You should have received a copy of the GNU General Public License and
22 a copy of the GCC Runtime Library Exception along with this program;
23 see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
24 <http://www.gnu.org/licenses/>. */
26 #include "libgfortran.h"
32 #ifdef HAVE_SYS_WAIT_H
37 enum { EXEC_SYNCHRONOUS
= -2, EXEC_NOERROR
= 0, EXEC_SYSTEMFAILED
,
38 EXEC_CHILDFAILED
, EXEC_INVALIDCOMMAND
};
39 static const char *cmdmsg_values
[] =
41 "Termination status of the command-language interpreter cannot be obtained",
42 "Execution of child process impossible",
43 "Invalid command line" };
48 set_cmdstat (int *cmdstat
, int value
)
52 else if (value
> EXEC_NOERROR
)
55 char msg
[MSGLEN
] = "EXECUTE_COMMAND_LINE: ";
56 strncat (msg
, cmdmsg_values
[value
], MSGLEN
- strlen(msg
) - 1);
57 runtime_error ("%s", msg
);
63 execute_command_line (const char *command
, bool wait
, int *exitstat
,
64 int *cmdstat
, char *cmdmsg
,
65 gfc_charlen_type command_len
,
66 gfc_charlen_type cmdmsg_len
)
68 /* Transform the Fortran string to a C string. */
69 char *cmd
= fc_strdup (command
, command_len
);
71 /* Flush all I/O units before executing the command. */
74 #if defined(HAVE_FORK)
77 /* Asynchronous execution. */
80 set_cmdstat (cmdstat
, EXEC_NOERROR
);
82 if ((pid
= fork()) < 0)
83 set_cmdstat (cmdstat
, EXEC_CHILDFAILED
);
87 int res
= system (cmd
);
88 _exit (WIFEXITED(res
) ? WEXITSTATUS(res
) : res
);
94 /* Synchronous execution. */
95 int res
= system (cmd
);
98 set_cmdstat (cmdstat
, EXEC_SYSTEMFAILED
);
101 set_cmdstat (cmdstat
, EXEC_SYNCHRONOUS
);
103 else if (res
== 127 || res
== 126
104 #if defined(WEXITSTATUS) && defined(WIFEXITED)
105 || (WIFEXITED(res
) && WEXITSTATUS(res
) == 127)
106 || (WIFEXITED(res
) && WEXITSTATUS(res
) == 126)
109 /* Shell return codes 126 and 127 mean that the command line could
110 not be executed for various reasons. */
111 set_cmdstat (cmdstat
, EXEC_INVALIDCOMMAND
);
113 set_cmdstat (cmdstat
, EXEC_NOERROR
);
117 #if defined(WEXITSTATUS) && defined(WIFEXITED)
118 *exitstat
= WIFEXITED(res
) ? WEXITSTATUS(res
) : res
;
127 /* Now copy back to the Fortran string if needed. */
128 if (cmdstat
&& *cmdstat
> EXEC_NOERROR
)
131 fstrcpy (cmdmsg
, cmdmsg_len
, cmdmsg_values
[*cmdstat
],
132 strlen (cmdmsg_values
[*cmdstat
]));
134 runtime_error ("Failure in EXECUTE_COMMAND_LINE: %s",
135 cmdmsg_values
[*cmdstat
]);
141 execute_command_line_i4 (const char *command
, GFC_LOGICAL_4
*wait
,
142 GFC_INTEGER_4
*exitstat
, GFC_INTEGER_4
*cmdstat
,
143 char *cmdmsg
, gfc_charlen_type command_len
,
144 gfc_charlen_type cmdmsg_len
);
145 export_proto(execute_command_line_i4
);
148 execute_command_line_i4 (const char *command
, GFC_LOGICAL_4
*wait
,
149 GFC_INTEGER_4
*exitstat
, GFC_INTEGER_4
*cmdstat
,
150 char *cmdmsg
, gfc_charlen_type command_len
,
151 gfc_charlen_type cmdmsg_len
)
153 bool w
= wait
? *wait
: true;
154 int estat
, estat_initial
, cstat
;
157 estat_initial
= estat
= *exitstat
;
159 execute_command_line (command
, w
, &estat
, cmdstat
? &cstat
: NULL
,
160 cmdmsg
, command_len
, cmdmsg_len
);
162 if (exitstat
&& estat
!= estat_initial
)
170 execute_command_line_i8 (const char *command
, GFC_LOGICAL_8
*wait
,
171 GFC_INTEGER_8
*exitstat
, GFC_INTEGER_8
*cmdstat
,
172 char *cmdmsg
, gfc_charlen_type command_len
,
173 gfc_charlen_type cmdmsg_len
);
174 export_proto(execute_command_line_i8
);
177 execute_command_line_i8 (const char *command
, GFC_LOGICAL_8
*wait
,
178 GFC_INTEGER_8
*exitstat
, GFC_INTEGER_8
*cmdstat
,
179 char *cmdmsg
, gfc_charlen_type command_len
,
180 gfc_charlen_type cmdmsg_len
)
182 bool w
= wait
? *wait
: true;
183 int estat
, estat_initial
, cstat
;
186 estat_initial
= estat
= *exitstat
;
188 execute_command_line (command
, w
, &estat
, cmdstat
? &cstat
: NULL
,
189 cmdmsg
, command_len
, cmdmsg_len
);
191 if (exitstat
&& estat
!= estat_initial
)