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
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
|
This file is alias.def, from which is created alias.c
It implements the builtins "alias" and "unalias" 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/>.
$BUILTIN alias
$FUNCTION alias_builtin
$DEPENDS_ON ALIAS
$PRODUCES alias.c
$SHORT_DOC alias [-p] [name[=value] ... ]
Define or display aliases.
Without arguments, `alias' prints the list of aliases in the reusable
form `alias NAME=VALUE' on standard output.
Otherwise, an alias is defined for each NAME whose VALUE is given.
A trailing space in VALUE causes the next word to be checked for
alias substitution when the alias is expanded.
Options:
-p print all defined aliases in a reusable format
Exit Status:
alias returns true unless a NAME is supplied for which no alias has been
defined.
$END
#include <config.h>
#if defined (ALIAS)
#if defined (HAVE_UNISTD_H)
# ifdef _MINIX
# include <sys/types.h>
# endif
# include <unistd.h>
#endif
# include "../bashansi.h"
# include "../bashintl.h"
# include <stdio.h>
# include "../shell.h"
# include "../alias.h"
# include "common.h"
# include "bashgetopt.h"
/* Flags for print_alias */
#define AL_REUSABLE 0x01
static void print_alias __P((alias_t *, int));
/* Hack the alias command in a Korn shell way. */
int
alias_builtin (list)
WORD_LIST *list;
{
int any_failed, offset, pflag, dflags;
alias_t **alias_list, *t;
char *name, *value;
dflags = posixly_correct ? 0 : AL_REUSABLE;
pflag = 0;
reset_internal_getopt ();
while ((offset = internal_getopt (list, "p")) != -1)
{
switch (offset)
{
case 'p':
pflag = 1;
dflags |= AL_REUSABLE;
break;
CASE_HELPOPT;
default:
builtin_usage ();
return (EX_USAGE);
}
}
list = loptend;
if (list == 0 || pflag)
{
if (aliases == 0)
return (EXECUTION_SUCCESS);
alias_list = all_aliases ();
if (alias_list == 0)
return (EXECUTION_SUCCESS);
for (offset = 0; alias_list[offset]; offset++)
print_alias (alias_list[offset], dflags);
free (alias_list); /* XXX - Do not free the strings. */
if (list == 0)
return (sh_chkwrite (EXECUTION_SUCCESS));
}
any_failed = 0;
while (list)
{
name = list->word->word;
for (offset = 0; name[offset] && name[offset] != '='; offset++)
;
if (offset && name[offset] == '=')
{
name[offset] = '\0';
value = name + offset + 1;
if (legal_alias_name (name, 0) == 0)
{
builtin_error (_("`%s': invalid alias name"), name);
any_failed++;
}
else
add_alias (name, value);
}
else
{
t = find_alias (name);
if (t)
print_alias (t, dflags);
else
{
sh_notfound (name);
any_failed++;
}
}
list = list->next;
}
return (any_failed ? EXECUTION_FAILURE : EXECUTION_SUCCESS);
}
#endif /* ALIAS */
$BUILTIN unalias
$FUNCTION unalias_builtin
$DEPENDS_ON ALIAS
$SHORT_DOC unalias [-a] name [name ...]
Remove each NAME from the list of defined aliases.
Options:
-a remove all alias definitions
Return success unless a NAME is not an existing alias.
$END
#if defined (ALIAS)
/* Remove aliases named in LIST from the aliases database. */
int
unalias_builtin (list)
register WORD_LIST *list;
{
register alias_t *alias;
int opt, aflag;
aflag = 0;
reset_internal_getopt ();
while ((opt = internal_getopt (list, "a")) != -1)
{
switch (opt)
{
case 'a':
aflag = 1;
break;
CASE_HELPOPT;
default:
builtin_usage ();
return (EX_USAGE);
}
}
list = loptend;
if (aflag)
{
delete_all_aliases ();
return (EXECUTION_SUCCESS);
}
if (list == 0)
{
builtin_usage ();
return (EX_USAGE);
}
aflag = 0;
while (list)
{
alias = find_alias (list->word->word);
if (alias)
remove_alias (alias->name);
else
{
sh_notfound (list->word->word);
aflag++;
}
list = list->next;
}
return (aflag ? EXECUTION_FAILURE : EXECUTION_SUCCESS);
}
/* Output ALIAS in such a way as to allow it to be read back in. */
static void
print_alias (alias, flags)
alias_t *alias;
int flags;
{
char *value;
value = sh_single_quote (alias->value);
if (flags & AL_REUSABLE)
printf ("alias %s", (alias->name && alias->name[0] == '-') ? "-- " : "");
printf ("%s=%s\n", alias->name, value);
free (value);
fflush (stdout);
}
#endif /* ALIAS */
|
