source: trunk/minix/commands/ash/miscbltin.c@ 10

Last change on this file since 10 was 9, checked in by Mattia Monga, 13 years ago

Minix 3.1.2a

File size: 4.1 KB
Line 
1/*-
2 * Copyright (c) 1991 The Regents of the University of California.
3 * All rights reserved.
4 *
5 * This code is derived from software contributed to Berkeley by
6 * Kenneth Almquist.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. All advertising materials mentioning features or use of this software
17 * must display the following acknowledgement:
18 * This product includes software developed by the University of
19 * California, Berkeley and its contributors.
20 * 4. Neither the name of the University nor the names of its contributors
21 * may be used to endorse or promote products derived from this software
22 * without specific prior written permission.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * SUCH DAMAGE.
35 */
36
37#ifndef lint
38static char sccsid[] = "@(#)miscbltin.c 5.2 (Berkeley) 3/13/91";
39#endif /* not lint */
40
41/*
42 * Miscelaneous builtins.
43 */
44
45#include "shell.h"
46#include "options.h"
47#include "var.h"
48#include "output.h"
49#include "memalloc.h"
50#include "error.h"
51#include "mystring.h"
52
53#undef eflag
54
55extern char **argptr; /* argument list for builtin command */
56
57
58/*
59 * The read builtin. The -e option causes backslashes to escape the
60 * following character.
61 *
62 * This uses unbuffered input, which may be avoidable in some cases.
63 */
64
65readcmd(argc, argv) char **argv; {
66 char **ap;
67 int backslash;
68 char c;
69 int eflag;
70 char *prompt;
71 char *ifs;
72 char *p;
73 int startword;
74 int status;
75 int i;
76
77 eflag = 0;
78 prompt = NULL;
79 while ((i = nextopt("ep:")) != '\0') {
80 if (i == 'p')
81 prompt = optarg;
82 else
83 eflag = 1;
84 }
85 if (prompt && isatty(0)) {
86 out2str(prompt);
87 flushall();
88 }
89 if (*(ap = argptr) == NULL)
90 error("arg count");
91 if ((ifs = bltinlookup("IFS", 1)) == NULL)
92 ifs = nullstr;
93 status = 0;
94 startword = 1;
95 backslash = 0;
96 STARTSTACKSTR(p);
97 for (;;) {
98 if (read(0, &c, 1) != 1) {
99 status = 1;
100 break;
101 }
102 if (c == '\0')
103 continue;
104 if (backslash) {
105 backslash = 0;
106 if (c != '\n')
107 STPUTC(c, p);
108 continue;
109 }
110 if (eflag && c == '\\') {
111 backslash++;
112 continue;
113 }
114 if (c == '\n')
115 break;
116 if (startword && *ifs == ' ' && strchr(ifs, c)) {
117 continue;
118 }
119 startword = 0;
120 if (backslash && c == '\\') {
121 if (read(0, &c, 1) != 1) {
122 status = 1;
123 break;
124 }
125 STPUTC(c, p);
126 } else if (ap[1] != NULL && strchr(ifs, c) != NULL) {
127 STACKSTRNUL(p);
128 setvar(*ap, stackblock(), 0);
129 ap++;
130 startword = 1;
131 STARTSTACKSTR(p);
132 } else {
133 STPUTC(c, p);
134 }
135 }
136 STACKSTRNUL(p);
137 setvar(*ap, stackblock(), 0);
138 while (*++ap != NULL)
139 setvar(*ap, nullstr, 0);
140 return status;
141}
142
143
144
145umaskcmd(argc, argv) char **argv; {
146 int mask;
147 char *p;
148 int i;
149
150 if ((p = argv[1]) == NULL) {
151 INTOFF;
152 mask = umask(0);
153 umask(mask);
154 INTON;
155 out1fmt("%.4o\n", mask); /* %#o might be better */
156 } else {
157 mask = 0;
158 do {
159 if ((unsigned)(i = *p - '0') >= 8)
160 error("Illegal number: %s", argv[1]);
161 mask = (mask << 3) + i;
162 } while (*++p != '\0');
163 umask(mask);
164 }
165 return 0;
166}
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