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 #define prom_printf printf
30 #define prom_putchar putchar
31 #define prom_vprintf vprintf
33 /* Imported functions */
34 extern int strcasecmp(const char *s1, const char *s2);
37 cft_strg, cft_flag, cft_end
47 #define MAX_VAR_NAME MAX_TOKEN
48 char *cfg_get_default (void);
52 {cft_strg, "device", NULL},
53 {cft_strg, "partition", NULL},
54 {cft_strg, "default", NULL},
55 {cft_strg, "timeout", NULL},
56 {cft_strg, "password", NULL},
57 {cft_flag, "restricted", NULL},
58 {cft_strg, "message", NULL},
59 {cft_strg, "root", NULL},
60 {cft_strg, "ramdisk", NULL},
61 {cft_flag, "read-only", NULL},
62 {cft_flag, "read-write", NULL},
63 {cft_strg, "append", NULL},
64 {cft_strg, "initrd", NULL},
65 {cft_flag, "initrd-prompt", NULL},
66 {cft_strg, "initrd-size", NULL},
67 {cft_flag, "pause-after", NULL},
68 {cft_strg, "pause-message", NULL},
69 {cft_strg, "init-code", NULL},
70 {cft_strg, "init-message", NULL},
71 {cft_strg, "fgcolor", NULL},
72 {cft_strg, "bgcolor", NULL},
73 {cft_strg, "ptypewarning", NULL},
74 {cft_end, NULL, NULL}};
78 {cft_strg, "image", NULL},
79 {cft_strg, "label", NULL},
80 {cft_strg, "alias", NULL},
81 {cft_flag, "single-key", NULL},
82 {cft_flag, "restricted", NULL},
83 {cft_strg, "device", NULL},
84 {cft_strg, "partition", NULL},
85 {cft_strg, "root", NULL},
86 {cft_strg, "ramdisk", NULL},
87 {cft_flag, "read-only", NULL},
88 {cft_flag, "read-write", NULL},
89 {cft_strg, "append", NULL},
90 {cft_strg, "literal", NULL},
91 {cft_strg, "initrd", NULL},
92 {cft_flag, "initrd-prompt", NULL},
93 {cft_strg, "initrd-size", NULL},
94 {cft_flag, "pause-after", NULL},
95 {cft_strg, "pause-message", NULL},
96 {cft_flag, "novideo", NULL},
97 {cft_strg, "sysmap", NULL},
98 {cft_end, NULL, NULL}};
100 static char flag_set;
101 static char *last_token = NULL, *last_item = NULL, *last_value = NULL;
103 static int back = 0; /* can go back by one char */
104 static char *currp = NULL;
105 static char *endp = NULL;
106 static char *file_name = NULL;
107 static CONFIG *curr_table = cf_options;
110 static struct IMAGES {
111 CONFIG table[sizeof (cf_image) / sizeof (cf_image[0])];
115 void cfg_error (char *msg,...)
120 prom_printf ("Config file error: ");
121 prom_vprintf (msg, ap);
123 prom_printf (" near line %d in file %s\n", line_num, file_name);
127 void cfg_warn (char *msg,...)
132 prom_printf ("Config file warning: ");
133 prom_vprintf (msg, ap);
135 prom_printf (" near line %d in file %s\n", line_num, file_name);
145 #define next_raw next
146 static int next (void)
157 static void again (int ch)
162 static char *cfg_get_token (void)
164 char buf[MAX_TOKEN + 1];
174 while (ch = next (), ch == ' ' || ch == '\t' || ch == '\n' || ch == '\r')
175 if (ch == '\n' || ch == '\r')
177 if (ch == EOF || ch == (int)NULL)
181 while (ch = next_raw (), (ch != '\n' && ch != '\r'))
190 while (here - buf < MAX_TOKEN) {
191 if ((ch = next ()) == EOF)
192 cfg_error ("EOF in quoted string");
205 while ((ch = next ()), ch == ' ' || ch == '\t');
215 cfg_error ("Bad use of \\ in quoted string");
217 } else if ((ch == '\n') || (ch == '\r'))
218 cfg_error ("newline is not allowed in quoted strings");
221 cfg_error ("Quoted string is too long");
222 return 0; /* not reached */
226 while (here - buf < MAX_TOKEN) {
229 cfg_error ("\\ precedes EOF");
233 *here++ = ch == '\t' ? ' ' : ch;
236 if (ch == ' ' || ch == '\t' || ch == '\n' || ch == '\r' || ch == '#' ||
237 ch == '=' || ch == EOF) {
242 if (!(escaped = (ch == '\\')))
247 cfg_error ("Token is too long");
248 return 0; /* not reached */
251 static void cfg_return_token (char *token)
256 static int cfg_next (char **item, char **value)
267 if (!(*item = cfg_get_token ()))
269 if (!strcmp (*item, "="))
270 cfg_error ("Syntax error");
271 if (!(this = cfg_get_token ()))
273 if (strcmp (this, "=")) {
274 cfg_return_token (this);
277 if (!(*value = cfg_get_token ()))
278 cfg_error ("Value expected at EOF");
279 if (!strcmp (*value, "="))
280 cfg_error ("Syntax error after %s", *item);
285 // The one and only call to this procedure is commented out
286 // below, so we don't need this unless we decide to use it again.
287 static void cfg_return (char *item, char *value)
294 static int cfg_set (char *item, char *value)
298 if (!strcasecmp (item, "image")) {
299 struct IMAGES **p = &images;
303 *p = (struct IMAGES *)malloc (sizeof (struct IMAGES));
305 prom_printf("malloc error in cfg_set\n");
309 curr_table = ((*p)->table);
310 memcpy (curr_table, cf_image, sizeof (cf_image));
312 for (walk = curr_table; walk->type != cft_end; walk++) {
313 if (walk->name && !strcasecmp (walk->name, item)) {
314 if (value && walk->type != cft_strg)
315 cfg_warn ("'%s' doesn't have a value", walk->name);
316 else if (!value && walk->type == cft_strg)
317 cfg_warn ("Value expected for '%s'", walk->name);
320 cfg_warn ("Duplicate entry '%s'", walk->name);
321 if (walk->type == cft_flag)
322 walk->data = &flag_set;
323 else if (walk->type == cft_strg)
329 if (walk->type != cft_end)
331 // cfg_return (item, value);
335 int cfg_parse (char *cfg_file, char *buff, int len)
339 file_name = cfg_file;
346 if (!cfg_next (&item, &value))
348 if (!cfg_set (item, value)) {
350 prom_printf("Can't set item %s to value %s\n", item, value);
357 static char *cfg_get_strg_i (CONFIG * table, char *item)
361 for (walk = table; walk->type != cft_end; walk++)
362 if (walk->name && !strcasecmp (walk->name, item))
367 char *cfg_get_strg (char *image, char *item)
374 return cfg_get_strg_i (cf_options, item);
375 for (p = images; p; p = p->next) {
376 label = cfg_get_strg_i (p->table, "label");
378 label = cfg_get_strg_i (p->table, "image");
379 alias = strrchr (label, '/');
383 alias = cfg_get_strg_i (p->table, "alias");
384 if (!strcmp (label, image) || (alias && !strcmp (alias, image))) {
385 ret = cfg_get_strg_i (p->table, item);
387 ret = cfg_get_strg_i (cf_options, item);
394 int cfg_get_flag (char *image, char *item)
396 return !!cfg_get_strg (image, item);
399 static int printl_count = 0;
400 static void printlabel (char *label, int defflag)
402 int len = strlen (label);
406 prom_printf ("%s %s",defflag?"*":" ", label);
410 if (printl_count == 3)
414 void cfg_print_images (void)
419 char *ret = cfg_get_default();//strg_i (cf_options, "default");
423 for (p = images; p; p = p->next) {
424 label = cfg_get_strg_i (p->table, "label");
426 label = cfg_get_strg_i (p->table, "image");
427 alias = strrchr (label, '/');
431 if(!strcmp(ret,label))
435 alias = cfg_get_strg_i (p->table, "alias");
436 printlabel (label, defflag);
438 printlabel (alias, 0);
443 char *cfg_get_default (void)
446 char *ret = cfg_get_strg_i (cf_options, "default");
452 ret = cfg_get_strg_i (images->table, "label");
454 ret = cfg_get_strg_i (images->table, "image");
455 label = strrchr (ret, '/');
462 char *cfg_next_image(char *prev)
471 for (p = images; p; p = p->next) {
472 label = cfg_get_strg_i (p->table, "label");
474 label = cfg_get_strg_i (p->table, "image");
475 alias = strrchr (label, '/');
481 if (!strcmp(prev, label))
488 * c-file-style: "k&r"