Contents of /trunk/mkinitrd-magellan/klibc/usr/dash/error.c
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Sat Sep 1 22:45:15 2007 UTC (16 years, 8 months ago) by niro
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Sat Sep 1 22:45:15 2007 UTC (16 years, 8 months ago) by niro
File MIME type: text/plain
File size: 5189 byte(s)
-import if magellan mkinitrd; it is a fork of redhats mkinitrd-5.0.8 with all magellan patches and features; deprecates magellan-src/mkinitrd
1 | /*- |
2 | * Copyright (c) 1991, 1993 |
3 | * The Regents of the University of California. All rights reserved. |
4 | * Copyright (c) 1997-2005 |
5 | * Herbert Xu <herbert@gondor.apana.org.au>. All rights reserved. |
6 | * |
7 | * This code is derived from software contributed to Berkeley by |
8 | * Kenneth Almquist. |
9 | * |
10 | * Redistribution and use in source and binary forms, with or without |
11 | * modification, are permitted provided that the following conditions |
12 | * are met: |
13 | * 1. Redistributions of source code must retain the above copyright |
14 | * notice, this list of conditions and the following disclaimer. |
15 | * 2. Redistributions in binary form must reproduce the above copyright |
16 | * notice, this list of conditions and the following disclaimer in the |
17 | * documentation and/or other materials provided with the distribution. |
18 | * 3. Neither the name of the University nor the names of its contributors |
19 | * may be used to endorse or promote products derived from this software |
20 | * without specific prior written permission. |
21 | * |
22 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
23 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
24 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
25 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
26 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
27 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
28 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
29 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
30 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
31 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
32 | * SUCH DAMAGE. |
33 | */ |
34 | |
35 | /* |
36 | * Errors and exceptions. |
37 | */ |
38 | |
39 | #include <signal.h> |
40 | #include <stdlib.h> |
41 | #include <string.h> |
42 | #include <unistd.h> |
43 | #include <stdio.h> |
44 | #include <string.h> |
45 | |
46 | #include "shell.h" |
47 | #include "main.h" |
48 | #include "options.h" |
49 | #include "output.h" |
50 | #include "error.h" |
51 | #include "show.h" |
52 | #include "eval.h" |
53 | #include "parser.h" |
54 | #include "trap.h" |
55 | #include "system.h" |
56 | |
57 | |
58 | /* |
59 | * Code to handle exceptions in C. |
60 | */ |
61 | |
62 | struct jmploc *handler; |
63 | int exception; |
64 | int suppressint; |
65 | volatile sig_atomic_t intpending; |
66 | |
67 | |
68 | static void exverror(int, const char *, va_list) |
69 | __attribute__((__noreturn__)); |
70 | |
71 | /* |
72 | * Called to raise an exception. Since C doesn't include exceptions, we |
73 | * just do a longjmp to the exception handler. The type of exception is |
74 | * stored in the global variable "exception". |
75 | */ |
76 | |
77 | void |
78 | exraise(int e) |
79 | { |
80 | #ifdef DEBUG |
81 | if (handler == NULL) |
82 | abort(); |
83 | #endif |
84 | INTOFF; |
85 | |
86 | exception = e; |
87 | longjmp(handler->loc, 1); |
88 | } |
89 | |
90 | |
91 | /* |
92 | * Called from trap.c when a SIGINT is received. (If the user specifies |
93 | * that SIGINT is to be trapped or ignored using the trap builtin, then |
94 | * this routine is not called.) Suppressint is nonzero when interrupts |
95 | * are held using the INTOFF macro. (The test for iflag is just |
96 | * defensive programming.) |
97 | */ |
98 | |
99 | void |
100 | onint(void) { |
101 | int i; |
102 | |
103 | intpending = 0; |
104 | sigclearmask(); |
105 | i = EXSIG; |
106 | if (gotsig[SIGINT - 1] && !trap[SIGINT]) { |
107 | if (!(rootshell && iflag)) { |
108 | signal(SIGINT, SIG_DFL); |
109 | raise(SIGINT); |
110 | } |
111 | i = EXINT; |
112 | } |
113 | exraise(i); |
114 | /* NOTREACHED */ |
115 | } |
116 | |
117 | static void |
118 | exvwarning2(const char *msg, va_list ap) |
119 | { |
120 | struct output *errs; |
121 | const char *name; |
122 | const char *fmt; |
123 | |
124 | errs = out2; |
125 | name = arg0; |
126 | fmt = "%s: "; |
127 | if (commandname) { |
128 | name = commandname; |
129 | fmt = "%s: %d: "; |
130 | } |
131 | outfmt(errs, fmt, name, startlinno); |
132 | doformat(errs, msg, ap); |
133 | #if FLUSHERR |
134 | outc('\n', errs); |
135 | #else |
136 | outcslow('\n', errs); |
137 | #endif |
138 | } |
139 | |
140 | #define exvwarning(a, b, c) exvwarning2(b, c) |
141 | |
142 | /* |
143 | * Exverror is called to raise the error exception. If the second argument |
144 | * is not NULL then error prints an error message using printf style |
145 | * formatting. It then raises the error exception. |
146 | */ |
147 | static void |
148 | exverror(int cond, const char *msg, va_list ap) |
149 | { |
150 | #ifdef DEBUG |
151 | if (msg) { |
152 | TRACE(("exverror(%d, \"", cond)); |
153 | TRACEV((msg, ap)); |
154 | TRACE(("\") pid=%d\n", getpid())); |
155 | } else |
156 | TRACE(("exverror(%d, NULL) pid=%d\n", cond, getpid())); |
157 | if (msg) |
158 | #endif |
159 | exvwarning(-1, msg, ap); |
160 | |
161 | flushall(); |
162 | exraise(cond); |
163 | /* NOTREACHED */ |
164 | } |
165 | |
166 | |
167 | void |
168 | sh_error(const char *msg, ...) |
169 | { |
170 | va_list ap; |
171 | |
172 | va_start(ap, msg); |
173 | exverror(EXERROR, msg, ap); |
174 | /* NOTREACHED */ |
175 | va_end(ap); |
176 | } |
177 | |
178 | |
179 | void |
180 | exerror(int cond, const char *msg, ...) |
181 | { |
182 | va_list ap; |
183 | |
184 | va_start(ap, msg); |
185 | exverror(cond, msg, ap); |
186 | /* NOTREACHED */ |
187 | va_end(ap); |
188 | } |
189 | |
190 | /* |
191 | * error/warning routines for external builtins |
192 | */ |
193 | |
194 | void |
195 | sh_warnx(const char *fmt, ...) |
196 | { |
197 | va_list ap; |
198 | |
199 | va_start(ap, fmt); |
200 | exvwarning(-1, fmt, ap); |
201 | va_end(ap); |
202 | } |
203 | |
204 | |
205 | /* |
206 | * Return a string describing an error. The returned string may be a |
207 | * pointer to a static buffer that will be overwritten on the next call. |
208 | * Action describes the operation that got the error. |
209 | */ |
210 | |
211 | const char * |
212 | errmsg(int e, int action) |
213 | { |
214 | if (e != ENOENT && e != ENOTDIR) |
215 | return strerror(e); |
216 | |
217 | if (action & E_OPEN) |
218 | return "No such file"; |
219 | else if (action & E_CREAT) |
220 | return "Directory nonexistent"; |
221 | else |
222 | return "not found"; |
223 | } |
224 | |
225 | |
226 | #ifdef REALLY_SMALL |
227 | void |
228 | __inton() { |
229 | if (--suppressint == 0 && intpending) { |
230 | onint(); |
231 | } |
232 | } |
233 | #endif |