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
|
This file is command.def, from which is created command.c.
It implements the builtin "command" in Bash.
Copyright (C) 1987-2015 Free Software Foundation, Inc.
This file is part of GNU Bash, the Bourne Again SHell.
Bash 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 of the License, or
(at your option) any later version.
Bash 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.
You should have received a copy of the GNU General Public License
along with Bash. If not, see <http://www.gnu.org/licenses/>.
$PRODUCES command.c
$BUILTIN command
$FUNCTION command_builtin
$SHORT_DOC command [-pVv] command [arg ...]
Execute a simple command or display information about commands.
Runs COMMAND with ARGS suppressing shell function lookup, or display
information about the specified COMMANDs. Can be used to invoke commands
on disk when a function with the same name exists.
Options:
-p use a default value for PATH that is guaranteed to find all of
the standard utilities
-v print a description of COMMAND similar to the `type' builtin
-V print a more verbose description of each COMMAND
Exit Status:
Returns exit status of COMMAND, or failure if COMMAND is not found.
$END
#include <config.h>
#if defined (HAVE_UNISTD_H)
# ifdef _MINIX
# include <sys/types.h>
# endif
# include <unistd.h>
#endif
#include "../bashansi.h"
#include "../shell.h"
#include "../execute_cmd.h"
#include "../flags.h"
#include "bashgetopt.h"
#include "common.h"
#if defined (_CS_PATH) && defined (HAVE_CONFSTR) && !HAVE_DECL_CONFSTR
extern size_t confstr __P((int, char *, size_t));
#endif
/* Run the commands mentioned in LIST without paying attention to shell
functions. */
int
command_builtin (list)
WORD_LIST *list;
{
int result, verbose, use_standard_path, opt;
COMMAND *command;
verbose = use_standard_path = 0;
reset_internal_getopt ();
while ((opt = internal_getopt (list, "pvV")) != -1)
{
switch (opt)
{
case 'p':
use_standard_path = CDESC_STDPATH;
break;
case 'V':
verbose = CDESC_SHORTDESC|CDESC_ABSPATH; /* look in common.h for constants */
break;
case 'v':
verbose = CDESC_REUSABLE; /* ditto */
break;
CASE_HELPOPT;
default:
builtin_usage ();
return (EX_USAGE);
}
}
list = loptend;
if (list == 0)
return (EXECUTION_SUCCESS);
#if defined (RESTRICTED_SHELL)
if (use_standard_path && restricted)
{
sh_restricted ("-p");
return (EXECUTION_FAILURE);
}
#endif
if (verbose)
{
int found, any_found;
for (any_found = 0; list; list = list->next)
{
found = describe_command (list->word->word, verbose|use_standard_path);
if (found == 0 && verbose != CDESC_REUSABLE)
sh_notfound (list->word->word);
any_found += found;
}
return (any_found ? EXECUTION_SUCCESS : EXECUTION_FAILURE);
}
begin_unwind_frame ("command_builtin");
#define COMMAND_BUILTIN_FLAGS (CMD_NO_FUNCTIONS | CMD_INHIBIT_EXPANSION | CMD_COMMAND_BUILTIN | (use_standard_path ? CMD_STDPATH : 0))
/* We don't want this to be reparsed (consider command echo 'foo &'), so
just make a simple_command structure and call execute_command with it. */
command = make_bare_simple_command ();
command->value.Simple->words = (WORD_LIST *)copy_word_list (list);
command->value.Simple->redirects = (REDIRECT *)NULL;
command->flags |= COMMAND_BUILTIN_FLAGS;
command->value.Simple->flags |= COMMAND_BUILTIN_FLAGS;
add_unwind_protect ((char *)dispose_command, command);
result = execute_command (command);
run_unwind_frame ("command_builtin");
return (result);
}
|
