2 * cfg.c - Handling and parsing of yaboot.conf
4 * Copyright (C) 1995 Werner Almesberger
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
29 /* Imported functions */
30 extern int strcasecmp(const char *s1, const char *s2);
33 cft_strg, cft_flag, cft_end
43 #define MAX_VAR_NAME MAX_TOKEN
48 {cft_strg, "device", NULL},
49 {cft_strg, "partition", NULL},
50 {cft_strg, "default", NULL},
51 {cft_strg, "timeout", NULL},
52 {cft_strg, "password", NULL},
53 {cft_flag, "restricted", NULL},
54 {cft_strg, "message", NULL},
55 {cft_strg, "root", NULL},
56 {cft_strg, "ramdisk", NULL},
57 {cft_flag, "read-only", NULL},
58 {cft_flag, "read-write", NULL},
59 {cft_strg, "append", NULL},
60 {cft_strg, "initrd", NULL},
61 {cft_flag, "initrd-prompt", NULL},
62 {cft_strg, "initrd-size", NULL},
63 {cft_flag, "pause-after", NULL},
64 {cft_strg, "pause-message", NULL},
65 {cft_strg, "init-code", NULL},
66 {cft_strg, "init-message", NULL},
67 {cft_strg, "fgcolor", NULL},
68 {cft_strg, "bgcolor", NULL},
69 {cft_strg, "ptypewarning", NULL},
70 {cft_end, NULL, NULL}};
74 {cft_strg, "image", NULL},
75 {cft_strg, "label", NULL},
76 {cft_strg, "alias", NULL},
77 {cft_flag, "single-key", NULL},
78 {cft_flag, "restricted", NULL},
79 {cft_strg, "device", NULL},
80 {cft_strg, "partition", NULL},
81 {cft_strg, "root", NULL},
82 {cft_strg, "ramdisk", NULL},
83 {cft_flag, "read-only", NULL},
84 {cft_flag, "read-write", NULL},
85 {cft_strg, "append", NULL},
86 {cft_strg, "literal", NULL},
87 {cft_strg, "initrd", NULL},
88 {cft_flag, "initrd-prompt", NULL},
89 {cft_strg, "initrd-size", NULL},
90 {cft_flag, "pause-after", NULL},
91 {cft_strg, "pause-message", NULL},
92 {cft_flag, "novideo", NULL},
93 {cft_strg, "sysmap", NULL},
94 {cft_end, NULL, NULL}};
97 static char *last_token = NULL, *last_item = NULL, *last_value = NULL;
99 static int back = 0; /* can go back by one char */
100 static char *currp = NULL;
101 static char *endp = NULL;
102 static char *file_name = NULL;
103 static CONFIG *curr_table = cf_options;
106 static struct IMAGES {
107 CONFIG table[sizeof (cf_image) / sizeof (cf_image[0])];
111 void cfg_error (char *msg,...)
116 prom_printf ("Config file error: ");
117 prom_vprintf (msg, ap);
119 prom_printf (" near line %d in file %s\n", line_num, file_name);
123 void cfg_warn (char *msg,...)
128 prom_printf ("Config file warning: ");
129 prom_vprintf (msg, ap);
131 prom_printf (" near line %d in file %s\n", line_num, file_name);
141 #define next_raw next
142 static int next (void)
153 static void again (int ch)
158 static char *cfg_get_token (void)
160 char buf[MAX_TOKEN + 1];
170 while (ch = next (), ch == ' ' || ch == '\t' || ch == '\n' || ch == '\r')
171 if (ch == '\n' || ch == '\r')
173 if (ch == EOF || ch == (int)NULL)
177 while (ch = next_raw (), (ch != '\n' && ch != '\r'))
186 while (here - buf < MAX_TOKEN) {
187 if ((ch = next ()) == EOF)
188 cfg_error ("EOF in quoted string");
201 while ((ch = next ()), ch == ' ' || ch == '\t');
211 cfg_error ("Bad use of \\ in quoted string");
213 } else if ((ch == '\n') || (ch == '\r'))
214 cfg_error ("newline is not allowed in quoted strings");
217 cfg_error ("Quoted string is too long");
218 return 0; /* not reached */
222 while (here - buf < MAX_TOKEN) {
225 cfg_error ("\\ precedes EOF");
229 *here++ = ch == '\t' ? ' ' : ch;
232 if (ch == ' ' || ch == '\t' || ch == '\n' || ch == '\r' || ch == '#' ||
233 ch == '=' || ch == EOF) {
238 if (!(escaped = (ch == '\\')))
243 cfg_error ("Token is too long");
244 return 0; /* not reached */
247 static void cfg_return_token (char *token)
252 static int cfg_next (char **item, char **value)
263 if (!(*item = cfg_get_token ()))
265 if (!strcmp (*item, "="))
266 cfg_error ("Syntax error");
267 if (!(this = cfg_get_token ()))
269 if (strcmp (this, "=")) {
270 cfg_return_token (this);
273 if (!(*value = cfg_get_token ()))
274 cfg_error ("Value expected at EOF");
275 if (!strcmp (*value, "="))
276 cfg_error ("Syntax error after %s", *item);
281 // The one and only call to this procedure is commented out
282 // below, so we don't need this unless we decide to use it again.
283 static void cfg_return (char *item, char *value)
290 static int cfg_set (char *item, char *value)
294 if (!strcasecmp (item, "image")) {
295 struct IMAGES **p = &images;
299 *p = (struct IMAGES *)malloc (sizeof (struct IMAGES));
301 prom_printf("malloc error in cfg_set\n");
305 curr_table = ((*p)->table);
306 memcpy (curr_table, cf_image, sizeof (cf_image));
308 for (walk = curr_table; walk->type != cft_end; walk++) {
309 if (walk->name && !strcasecmp (walk->name, item)) {
310 if (value && walk->type != cft_strg)
311 cfg_warn ("'%s' doesn't have a value", walk->name);
312 else if (!value && walk->type == cft_strg)
313 cfg_warn ("Value expected for '%s'", walk->name);
316 cfg_warn ("Duplicate entry '%s'", walk->name);
317 if (walk->type == cft_flag)
318 walk->data = &flag_set;
319 else if (walk->type == cft_strg)
325 if (walk->type != cft_end)
327 // cfg_return (item, value);
331 int cfg_parse (char *cfg_file, char *buff, int len)
335 file_name = cfg_file;
342 if (!cfg_next (&item, &value))
344 if (!cfg_set (item, value)) {
346 prom_printf("Can't set item %s to value %s\n", item, value);
353 static char *cfg_get_strg_i (CONFIG * table, char *item)
357 for (walk = table; walk->type != cft_end; walk++)
358 if (walk->name && !strcasecmp (walk->name, item))
363 char *cfg_get_strg (char *image, char *item)
370 return cfg_get_strg_i (cf_options, item);
371 for (p = images; p; p = p->next) {
372 label = cfg_get_strg_i (p->table, "label");
374 label = cfg_get_strg_i (p->table, "image");
375 alias = strrchr (label, '/');
379 alias = cfg_get_strg_i (p->table, "alias");
380 if (!strcmp (label, image) || (alias && !strcmp (alias, image))) {
381 ret = cfg_get_strg_i (p->table, item);
383 ret = cfg_get_strg_i (cf_options, item);
390 int cfg_get_flag (char *image, char *item)
392 return !!cfg_get_strg (image, item);
395 static int printl_count = 0;
396 static void printlabel (char *label, int defflag)
398 int len = strlen (label);
402 prom_printf ("%s %s",defflag?"*":" ", label);
406 if (printl_count == 3)
410 void cfg_print_images (void)
415 char *ret = cfg_get_strg_i (cf_options, "default");
419 for (p = images; p; p = p->next) {
420 label = cfg_get_strg_i (p->table, "label");
422 label = cfg_get_strg_i (p->table, "image");
423 alias = strrchr (label, '/');
427 if(!strcmp(ret,label))
431 alias = cfg_get_strg_i (p->table, "alias");
432 printlabel (label, defflag);
434 printlabel (alias, 0);
439 char *cfg_get_default (void)
442 char *ret = cfg_get_strg_i (cf_options, "default");
448 ret = cfg_get_strg_i (images->table, "label");
450 ret = cfg_get_strg_i (images->table, "image");
451 label = strrchr (ret, '/');
460 * c-file-style: "k&r"