.
[glibc/history.git] / stdlib / fmtmsg.c
blobe0f4061cee8ed6744d8417e3095dee1ce76e2978
1 /* Copyright (C) 1997,1999,2000-2003,2005 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3 Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, write to the Free
17 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
18 02111-1307 USA. */
20 #include <fmtmsg.h>
21 #include <bits/libc-lock.h>
22 #include <stdio.h>
23 #include <stdlib.h>
24 #include <string.h>
25 #include <sys/syslog.h>
26 #ifdef USE_IN_LIBIO
27 # include <wchar.h>
28 #endif
31 /* We have global data, protect the modification. */
32 __libc_lock_define_initialized (static, lock)
35 enum
37 label_mask = 0x01,
38 severity_mask = 0x02,
39 text_mask = 0x04,
40 action_mask = 0x08,
41 tag_mask = 0x10,
42 all_mask = label_mask | severity_mask | text_mask | action_mask | tag_mask
45 static const struct
47 size_t len;
48 /* Adjust the size if new elements are added. */
49 const char name[12];
50 } keywords[] =
52 { 5, "label" },
53 { 8, "severity" },
54 { 4, "text" },
55 { 6, "action"},
56 { 3, "tag" }
58 #define NKEYWORDS (sizeof( keywords) / sizeof (keywords[0]))
61 struct severity_info
63 int severity;
64 const char *string;
65 struct severity_info *next;
69 /* List of known severities. */
70 static const struct severity_info nosev =
72 MM_NOSEV, "", NULL
74 static const struct severity_info haltsev =
76 MM_HALT, "HALT", (struct severity_info *) &nosev
78 static const struct severity_info errorsev =
80 MM_ERROR, "ERROR", (struct severity_info *) &haltsev
82 static const struct severity_info warningsev =
84 MM_WARNING, "WARNING", (struct severity_info *) &errorsev
86 static const struct severity_info infosev =
88 MM_INFO, "INFO", (struct severity_info *) &warningsev
91 /* Start of the list. */
92 static struct severity_info *severity_list = (struct severity_info *) &infosev;
94 /* Mask of values we will print. */
95 static int print;
97 /* Prototypes for local functions. */
98 static void init (void);
99 static int internal_addseverity (int severity, const char *string)
100 internal_function;
104 fmtmsg (long int classification, const char *label, int severity,
105 const char *text, const char *action, const char *tag)
107 __libc_once_define (static, once);
108 int result = MM_OK;
109 struct severity_info *severity_rec;
111 /* Make sure everything is initialized. */
112 __libc_once (once, init);
114 /* Start the real work. First check whether the input is ok. */
115 if (label != MM_NULLLBL)
117 /* Must be two fields, separated by a colon. */
118 const char *cp = strchr (label, ':');
119 if (cp == NULL)
120 return MM_NOTOK;
122 /* The first field must not contain more then 10 bytes. */
123 if (cp - label > 10
124 /* The second field must not have more then 14 bytes. */
125 || strlen (cp + 1) > 14)
126 return MM_NOTOK;
129 for (severity_rec = severity_list; severity_rec != NULL;
130 severity_rec = severity_rec->next)
131 if (severity == severity_rec->severity)
132 /* Bingo. */
133 break;
135 /* If we don't know anything about the severity level return an error. */
136 if (severity_rec == NULL)
137 return MM_NOTOK;
140 #ifdef __libc_ptf_call
141 /* We do not want this call to be cut short by a thread
142 cancellation. Therefore disable cancellation for now. */
143 int state = PTHREAD_CANCEL_ENABLE;
144 __libc_ptf_call (pthread_setcancelstate, (PTHREAD_CANCEL_DISABLE, &state),
146 #endif
148 /* Now we can print. */
149 if (classification & MM_PRINT)
151 int do_label = (print & label_mask) && label != MM_NULLLBL;
152 int do_severity = (print & severity_mask) && severity != MM_NULLSEV;
153 int do_text = (print & text_mask) && text != MM_NULLTXT;
154 int do_action = (print & action_mask) && action != MM_NULLACT;
155 int do_tag = (print & tag_mask) && tag != MM_NULLTAG;
157 if (__fxprintf (stderr, "%s%s%s%s%s%s%s%s%s%s\n",
158 do_label ? label : "",
159 do_label && (do_severity | do_text | do_action | do_tag)
160 ? ": " : "",
161 do_severity ? severity_rec->string : "",
162 do_severity && (do_text | do_action | do_tag)
163 ? ": " : "",
164 do_text ? text : "",
165 do_text && (do_action | do_tag) ? "\n" : "",
166 do_action ? "TO FIX: " : "",
167 do_action ? action : "",
168 do_action && do_tag ? " " : "",
169 do_tag ? tag : "") < 0)
170 /* Oh, oh. An error occurred during the output. */
171 result = MM_NOMSG;
174 if (classification & MM_CONSOLE)
176 int do_label = label != MM_NULLLBL;
177 int do_severity = severity != MM_NULLSEV;
178 int do_text = text != MM_NULLTXT;
179 int do_action = action != MM_NULLACT;
180 int do_tag = tag != MM_NULLTAG;
182 syslog (LOG_ERR, "%s%s%s%s%s%s%s%s%s%s\n",
183 do_label ? label : "",
184 do_label && (do_severity | do_text | do_action | do_tag)
185 ? ": " : "",
186 do_severity ? severity_rec->string : "",
187 do_severity && (do_text | do_action | do_tag) ? ": " : "",
188 do_text ? text : "",
189 do_text && (do_action | do_tag) ? "\n" : "",
190 do_action ? "TO FIX: " : "",
191 do_action ? action : "",
192 do_action && do_tag ? " " : "",
193 do_tag ? tag : "");
196 #ifdef __libc_ptf_call
197 __libc_ptf_call (pthread_setcancelstate, (state, NULL), 0);
198 #endif
200 return result;
204 /* Initialize from environment variable content. */
205 static void
206 init (void)
208 const char *msgverb_var = getenv ("MSGVERB");
209 const char *sevlevel_var = getenv ("SEV_LEVEL");
211 if (msgverb_var != NULL && msgverb_var[0] != '\0')
213 /* Using this extra variable allows us to work without locking. */
216 size_t cnt;
218 for (cnt = 0; cnt < NKEYWORDS; ++cnt)
219 if (memcmp (msgverb_var,
220 keywords[cnt].name, keywords[cnt].len) == 0
221 && (msgverb_var[keywords[cnt].len] == ':'
222 || msgverb_var[keywords[cnt].len] == '\0'))
223 break;
225 if (cnt < NKEYWORDS)
227 print |= 1 << cnt;
229 msgverb_var += keywords[cnt].len;
230 if (msgverb_var[0] == ':')
231 ++msgverb_var;
233 else
235 /* We found an illegal keyword in the environment
236 variable. The specifications say that we print all
237 fields. */
238 print = all_mask;
239 break;
242 while (msgverb_var[0] != '\0');
244 else
245 print = all_mask;
248 if (sevlevel_var != NULL)
250 __libc_lock_lock (lock);
252 while (sevlevel_var[0] != '\0')
254 const char *end = __strchrnul (sevlevel_var, ':');
255 int level;
257 /* First field: keyword. This is not used here but it must be
258 present. */
259 while (sevlevel_var < end)
260 if (*sevlevel_var++ == ',')
261 break;
263 if (sevlevel_var < end)
265 /* Second field: severity level, a number. */
266 char *cp;
268 level = strtol (sevlevel_var, &cp, 0);
269 if (cp != sevlevel_var && cp < end && *cp++ == ','
270 && level > MM_INFO)
272 const char *new_string;
274 new_string = __strndup (cp, end - cp);
276 if (new_string != NULL
277 && (internal_addseverity (level, new_string)
278 != MM_OK))
279 free ((char *) new_string);
283 sevlevel_var = end + (*end == ':' ? 1 : 0);
289 /* Add the new entry to the list. */
290 static int
291 internal_function
292 internal_addseverity (int severity, const char *string)
294 struct severity_info *runp, *lastp;
295 int result = MM_OK;
297 /* First see if there is already a record for the severity level. */
298 for (runp = severity_list, lastp = NULL; runp != NULL; runp = runp->next)
299 if (runp->severity == severity)
300 break;
301 else
302 lastp = runp;
304 if (runp != NULL)
306 if (string != NULL)
307 /* Change the string. */
308 runp->string = string;
309 else
311 /* Remove the severity class. */
312 if (lastp == NULL)
313 severity_list = runp->next;
314 else
315 lastp->next = runp->next;
317 free (runp);
320 else if (string != NULL)
322 runp = malloc (sizeof (*runp));
323 if (runp == NULL)
324 result = MM_NOTOK;
325 else
327 runp->severity = severity;
328 runp->next = severity_list;
329 runp->string = string;
330 severity_list = runp;
333 else
334 /* We tried to remove a non-existing severity class. */
335 result = MM_NOTOK;
337 return result;
341 /* Add new severity level or remove old one. */
343 addseverity (int severity, const char *string)
345 int result;
347 /* Prevent illegal SEVERITY values. */
348 if (severity <= MM_INFO)
349 return MM_NOTOK;
351 /* Protect the global data. */
352 __libc_lock_lock (lock);
354 /* Do the real work. */
355 result = internal_addseverity (severity, string);
357 /* Release the lock. */
358 __libc_lock_unlock (lock);
360 return result;
364 libc_freeres_fn (free_mem)
366 struct severity_info *runp = severity_list;
368 while (runp != NULL)
369 if (runp->severity > MM_INFO)
371 /* This is data we have to release. */
372 struct severity_info *here = runp;
373 runp = runp->next;
374 free (here);
376 else
377 runp = runp->next;