1 /* $NetBSD: err.c,v 1.26 2025/03/20 15:02:00 buhrow Exp $ */
2
3 /*-
4 * Copyright (c) 1980, 1991, 1993
5 * The Regents of the University of California. All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of the University nor the names of its contributors
16 * may be used to endorse or promote products derived from this software
17 * without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 */
31
32 #include <sys/cdefs.h>
33 #ifndef lint
34 #if 0
35 static char sccsid[] = "@(#)err.c 8.1 (Berkeley) 5/31/93";
36 #else
37 __RCSID("$NetBSD: err.c,v 1.26 2025/03/20 15:02:00 buhrow Exp $");
38 #endif
39 #endif /* not lint */
40
41 #include <sys/types.h>
42
43 #include <stdarg.h>
44 #include <stdlib.h>
45 #include <unistd.h>
46
47 #include "csh.h"
48 #include "extern.h"
49
50 char *seterr = NULL; /* Holds last error if there was one */
51
52 #define ERR_FLAGS ((int)0xf0000000)
53 #define ERR_NAME 0x10000000
54 #define ERR_SILENT 0x20000000
55 #define ERR_OLD 0x40000000
56
57 static const char *errorlist[] =
58 {
59 #define ERR_SYNTAX 0
60 "Syntax Error",
61 #define ERR_NOTALLOWED 1
62 "%s is not allowed",
63 #define ERR_WTOOLONG 2
64 "Word too long",
65 #define ERR_LTOOLONG 3
66 "$< line too long",
67 #define ERR_DOLZERO 4
68 "No file for $0",
69 #define ERR_DOLQUEST 5
70 "$? not allowed here",
71 #define ERR_INCBR 6
72 "Incomplete [] modifier",
73 #define ERR_EXPORD 7
74 "$ expansion must end before ]",
75 #define ERR_BADMOD 8
76 "Bad : modifier in $ (%c)",
77 #define ERR_SUBSCRIPT 9
78 "Subscript error",
79 #define ERR_BADNUM 10
80 "Badly formed number",
81 #define ERR_NOMORE 11
82 "No more words",
83 #define ERR_FILENAME 12
84 "Missing file name",
85 #define ERR_GLOB 13
86 "Internal glob error",
87 #define ERR_COMMAND 14
88 "Command not found",
89 #define ERR_TOOFEW 15
90 "Too few arguments",
91 #define ERR_TOOMANY 16
92 "Too many arguments",
93 #define ERR_DANGER 17
94 "Too dangerous to alias that",
95 #define ERR_EMPTYIF 18
96 "Empty if",
97 #define ERR_IMPRTHEN 19
98 "Improper then",
99 #define ERR_NOPAREN 20
100 "Words not parenthesized",
101 #define ERR_NOTFOUND 21
102 "%s not found",
103 #define ERR_MASK 22
104 "Improper mask",
105 #define ERR_LIMIT 23
106 "No such limit",
107 #define ERR_TOOLARGE 24
108 "Argument too large",
109 #define ERR_SCALEF 25
110 "Improper or unknown scale factor",
111 #define ERR_UNDVAR 26
112 "Undefined variable",
113 #define ERR_DEEP 27
114 "Directory stack not that deep",
115 #define ERR_BADSIG 28
116 "Bad signal number",
117 #define ERR_UNKSIG 29
118 "Unknown signal; kill -l lists signals",
119 #define ERR_VARBEGIN 30
120 "Variable name must begin with a letter",
121 #define ERR_VARTOOLONG 31
122 "Variable name too long",
123 #define ERR_VARALNUM 32
124 "Variable name must contain alphanumeric characters",
125 #define ERR_JOBCONTROL 33
126 "No job control in this shell",
127 #define ERR_EXPRESSION 34
128 "Expression Syntax",
129 #define ERR_NOHOMEDIR 35
130 "No home directory",
131 #define ERR_CANTCHANGE 36
132 "Can't change to home directory",
133 #define ERR_NULLCOM 37
134 "Invalid null command",
135 #define ERR_ASSIGN 38
136 "Assignment missing expression",
137 #define ERR_UNKNOWNOP 39
138 "Unknown operator",
139 #define ERR_AMBIG 40
140 "Ambiguous",
141 #define ERR_EXISTS 41
142 "%s: File exists",
143 #define ERR_INTR 42
144 "Interrupted",
145 #define ERR_RANGE 43
146 "Subscript out of range",
147 #define ERR_OVERFLOW 44
148 "Line overflow",
149 #define ERR_VARMOD 45
150 "Unknown variable modifier",
151 #define ERR_NOSUCHJOB 46
152 "No such job",
153 #define ERR_TERMINAL 47
154 "Can't from terminal",
155 #define ERR_NOTWHILE 48
156 "Not in while/foreach",
157 #define ERR_NOPROC 49
158 "No more processes",
159 #define ERR_NOMATCH 50
160 "No match",
161 #define ERR_MISSING 51
162 "Missing %c",
163 #define ERR_UNMATCHED 52
164 "Unmatched %c",
165 #define ERR_NOMEM 53
166 "Out of memory",
167 #define ERR_PIPE 54
168 "Can't make pipe",
169 #define ERR_SYSTEM 55
170 "%s: %s",
171 #define ERR_STRING 56
172 "%s",
173 #define ERR_JOBS 57
174 "usage: jobs [-l|-Z [title]]",
175 #define ERR_JOBARGS 58
176 "Arguments should be jobs or process id's",
177 #define ERR_JOBCUR 59
178 "No current job",
179 #define ERR_JOBPREV 60
180 "No previous job",
181 #define ERR_JOBPAT 61
182 "No job matches pattern",
183 #define ERR_NESTING 62
184 "Fork nesting > %d; maybe `...` loop",
185 #define ERR_JOBCTRLSUB 63
186 "No job control in subshells",
187 #define ERR_BADPLPS 64
188 "Badly placed ()'s",
189 #define ERR_STOPPED 65
190 "%sThere are suspended jobs",
191 #define ERR_NODIR 66
192 "No other directory",
193 #define ERR_EMPTY 67
194 "Directory stack empty",
195 #define ERR_BADDIR 68
196 "Bad directory",
197 #define ERR_DIRUS 69
198 "usage: %s [-lvn]%s",
199 #define ERR_HFLAG 70
200 "No operand for -h flag",
201 #define ERR_NOTLOGIN 71
202 "Not a login shell",
203 #define ERR_DIV0 72
204 "Division by 0",
205 #define ERR_MOD0 73
206 "Mod by 0",
207 #define ERR_BADSCALE 74
208 "Bad scaling; did you mean \"%s\"?",
209 #define ERR_SUSPLOG 75
210 "Can't suspend a login shell (yet)",
211 #define ERR_UNKUSER 76
212 "Unknown user: %s",
213 #define ERR_NOHOME 77
214 "No $home variable set",
215 #define ERR_HISTUS 78
216 "usage: history [-rh] [# number of events]",
217 #define ERR_SPDOLLT 79
218 "$, ! or < not allowed with $# or $?",
219 #define ERR_NEWLINE 80
220 "Newline in variable name",
221 #define ERR_SPSTAR 81
222 "* not allowed with $# or $?",
223 #define ERR_DIGIT 82
224 "$?<digit> or $#<digit> not allowed",
225 #define ERR_VARILL 83
226 "Illegal variable name",
227 #define ERR_NLINDEX 84
228 "Newline in variable index",
229 #define ERR_EXPOVFL 85
230 "Expansion buffer overflow",
231 #define ERR_VARSYN 86
232 "Variable syntax",
233 #define ERR_BADBANG 87
234 "Bad ! form",
235 #define ERR_NOSUBST 88
236 "No previous substitute",
237 #define ERR_BADSUBST 89
238 "Bad substitute",
239 #define ERR_LHS 90
240 "No previous left hand side",
241 #define ERR_RHSLONG 91
242 "Right hand side too long",
243 #define ERR_BADBANGMOD 92
244 "Bad ! modifier: %c",
245 #define ERR_MODFAIL 93
246 "Modifier failed",
247 #define ERR_SUBOVFL 94
248 "Substitution buffer overflow",
249 #define ERR_BADBANGARG 95
250 "Bad ! arg selector",
251 #define ERR_NOSEARCH 96
252 "No prev search",
253 #define ERR_NOEVENT 97
254 "%s: Event not found",
255 #define ERR_TOOMANYRP 98
256 "Too many )'s",
257 #define ERR_TOOMANYLP 99
258 "Too many ('s",
259 #define ERR_BADPLP 100
260 "Badly placed (",
261 #define ERR_MISRED 101
262 "Missing name for redirect",
263 #define ERR_OUTRED 102
264 "Ambiguous output redirect",
265 #define ERR_REDPAR 103
266 "Can't << within ()'s",
267 #define ERR_INRED 104
268 "Ambiguous input redirect",
269 #define ERR_ALIASLOOP 105
270 "Alias loop",
271 #define ERR_HISTLOOP 106
272 "!# History loop",
273 #define ERR_ARCH 107
274 "%s: %s. Wrong Architecture",
275 #define ERR_FILEINQ 108
276 "Malformed file inquiry",
277 #define ERR_SELOVFL 109
278 "Selector overflow",
279 #define ERR_INVALID 110
280 "Invalid Error"
281 };
282
283 /*
284 * The parser and scanner set up errors for later by calling seterr,
285 * which sets the variable err as a side effect; later to be tested,
286 * e.g. in process.
287 */
288 void
seterror(int id,...)289 seterror(int id, ...)
290 {
291 if (seterr == 0) {
292 char berr[BUFSIZE];
293 va_list va;
294
295 va_start(va, id);
296 if (id < 0 || id >= (int)(sizeof(errorlist) / sizeof(errorlist[0])) - 1)
297 id = ERR_INVALID;
298 (void)vsnprintf(berr, sizeof(berr), errorlist[id], va);
299 va_end(va);
300
301 seterr = strsave(berr);
302 }
303 }
304
305 /*
306 * Print the error with the given id.
307 *
308 * Special ids:
309 * ERR_SILENT: Print nothing.
310 * ERR_OLD: Print the previously set error if one was there.
311 * otherwise return.
312 * ERR_NAME: If this bit is set, print the name of the function
313 * in bname
314 *
315 * This routine always resets or exits. The flag haderr
316 * is set so the routine who catches the unwind can propagate
317 * it if they want.
318 *
319 * Note that any open files at the point of error will eventually
320 * be closed in the routine process in sh.c which is the only
321 * place error unwinds are ever caught.
322 */
323 void
stderror(int id,...)324 stderror(int id, ...)
325 {
326 va_list va;
327 Char **v;
328 int flags;
329
330 flags = id & ERR_FLAGS;
331 id &= ~ERR_FLAGS;
332
333 if ((flags & ERR_OLD) && seterr == NULL)
334 abort();
335
336 if (id < 0 || id > (int)(sizeof(errorlist) / sizeof(errorlist[0])))
337 id = ERR_INVALID;
338
339 (void)fflush(cshout);
340 (void)fflush(csherr);
341 haderr = 1; /* Now to diagnostic output */
342 timflg = 0; /* This isn't otherwise reset */
343
344
345 if (!(flags & ERR_SILENT)) {
346 if (flags & ERR_NAME)
347 (void)fprintf(csherr, "%s: ", bname);
348 if ((flags & ERR_OLD))
349 /* Old error. */
350 (void)fprintf(csherr, "%s.\n", seterr);
351 else {
352 va_start(va, id);
353 (void)vfprintf(csherr, errorlist[id], va);
354 va_end(va);
355 (void)fprintf(csherr, ".\n");
356 }
357 }
358
359 if (seterr) {
360 free(seterr);
361 seterr = NULL;
362 }
363
364 if ((v = pargv) != NULL)
365 pargv = 0, blkfree(v);
366 if ((v = gargv) != NULL)
367 gargv = 0, blkfree(v);
368
369 (void)fflush(cshout);
370 (void)fflush(csherr);
371 didfds = 0; /* Forget about 0,1,2 */
372 /*
373 * Go away if -e or we are a child shell
374 */
375 if (exiterr || child)
376 xexit(1);
377
378 /*
379 * Reset the state of the input. This buffered seek to end of file will
380 * also clear the while/foreach stack.
381 */
382 btoeof();
383
384 set(STRstatus, Strsave(STR1));
385 if (tpgrp > 0)
386 (void)tcsetpgrp(FSHTTY, tpgrp);
387 reset(); /* Unwind */
388 }
389