2003-04-07 16:21:26 +00:00
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/*
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* $FreeBSD$
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*/
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#include <stdio.h>
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#include <ctype.h>
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#include <string.h>
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#include <stdlib.h>
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#include <sys/queue.h>
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#include <sys/param.h>
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2003-05-19 07:10:12 +00:00
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#include "debug.h"
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#include "rtld.h"
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2003-04-07 16:21:26 +00:00
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#ifndef _PATH_LIBMAP_CONF
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#define _PATH_LIBMAP_CONF "/etc/libmap.conf"
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#endif
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TAILQ_HEAD(lm_list, lm);
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struct lm {
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char *f;
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char *t;
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TAILQ_ENTRY(lm) lm_link;
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};
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TAILQ_HEAD(lmp_list, lmp) lmp_head = TAILQ_HEAD_INITIALIZER(lmp_head);
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struct lmp {
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char *p;
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struct lm_list lml;
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TAILQ_ENTRY(lmp) lmp_link;
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};
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static void lm_add (char *, char *, char *);
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static void lm_free (struct lm_list *);
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static char * lml_find (struct lm_list *, const char *);
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static struct lm_list * lmp_find (const char *);
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static struct lm_list * lmp_init (char *);
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2003-04-10 01:44:19 +00:00
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#define iseol(c) (((c) == '#') || ((c) == '\0') || \
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((c) == '\n') || ((c) == '\r'))
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2003-04-07 16:21:26 +00:00
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void
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lm_init (void)
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{
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FILE *fp;
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char *cp;
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char *f, *t, *p;
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char prog[MAXPATHLEN];
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char line[MAXPATHLEN + 2];
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TAILQ_INIT(&lmp_head);
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if ((fp = fopen(_PATH_LIBMAP_CONF, "r")) == NULL)
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return;
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p = NULL;
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while ((cp = fgets(line, MAXPATHLEN + 1, fp)) != NULL) {
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t = f = NULL;
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2003-04-10 01:44:19 +00:00
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2003-04-07 16:21:26 +00:00
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/* Skip over leading space */
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2003-04-10 01:44:19 +00:00
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while (isspace(*cp)) cp++;
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2003-04-07 16:21:26 +00:00
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/* Found a comment or EOL */
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2003-04-30 19:05:53 +00:00
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if (iseol(*cp)) continue;
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2003-04-10 01:44:19 +00:00
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/* Found a constraint selector */
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2003-04-07 16:21:26 +00:00
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if (*cp == '[') {
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cp++;
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2003-04-10 01:44:19 +00:00
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2003-04-07 16:21:26 +00:00
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/* Skip leading space */
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2003-04-10 01:44:19 +00:00
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while (isspace(*cp)) cp++;
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2003-04-07 16:21:26 +00:00
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/* Found comment, EOL or end of selector */
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2003-04-30 19:05:53 +00:00
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if (iseol(*cp) || *cp == ']')
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continue;
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2003-04-10 01:44:19 +00:00
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2003-04-30 19:05:53 +00:00
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p = cp++;
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2003-04-07 16:21:26 +00:00
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/* Skip to end of word */
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2003-04-30 19:05:53 +00:00
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while (!isspace(*cp) && !iseol(*cp) && *cp != ']')
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cp++;
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2003-04-10 01:44:19 +00:00
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/* Skip and zero out trailing space */
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while (isspace(*cp)) *cp++ = '\0';
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/* Check if there is a closing brace */
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2003-04-30 19:05:53 +00:00
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if (*cp != ']') continue;
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2003-04-10 01:44:19 +00:00
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/* Terminate string if there was no trailing space */
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2003-04-07 16:21:26 +00:00
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*cp++ = '\0';
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2003-04-10 01:44:19 +00:00
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/*
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* There should be nothing except whitespace or comment
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2003-05-29 22:58:26 +00:00
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from this point to the end of the line.
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2003-04-10 01:44:19 +00:00
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*/
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while(isspace(*cp++));
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2003-04-30 19:05:53 +00:00
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if (!iseol(*cp)) continue;
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strcpy(prog, p);
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p = prog;
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continue;
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2003-04-07 16:21:26 +00:00
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}
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2003-04-10 01:44:19 +00:00
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/* Parse the 'from' candidate. */
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2003-04-30 19:05:53 +00:00
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f = cp++;
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2003-04-10 01:44:19 +00:00
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while (!isspace(*cp) && !iseol(*cp)) cp++;
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/* Skip and zero out the trailing whitespace */
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while (isspace(*cp)) *cp++ = '\0';
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/* Found a comment or EOL */
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2003-04-30 19:05:53 +00:00
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if (iseol(*cp)) continue;
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2003-04-10 01:44:19 +00:00
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/* Parse 'to' mapping */
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2003-04-30 19:05:53 +00:00
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t = cp++;
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2003-04-10 01:44:19 +00:00
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while (!isspace(*cp) && !iseol(*cp)) cp++;
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2003-05-29 22:58:26 +00:00
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2003-04-30 19:05:53 +00:00
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/* Skip and zero out the trailing whitespace */
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while (isspace(*cp)) *cp++ = '\0';
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/* Should be no extra tokens at this point */
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if (!iseol(*cp)) continue;
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2003-04-07 16:21:26 +00:00
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2003-04-30 19:05:53 +00:00
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*cp = '\0';
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2003-05-19 07:10:12 +00:00
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lm_add(p, xstrdup(f), xstrdup(t));
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2003-04-07 16:21:26 +00:00
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}
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2003-04-30 19:05:53 +00:00
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fclose(fp);
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2003-04-07 16:21:26 +00:00
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return;
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}
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static void
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lm_free (struct lm_list *lml)
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{
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struct lm *lm;
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while (!TAILQ_EMPTY(lml)) {
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lm = TAILQ_FIRST(lml);
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TAILQ_REMOVE(lml, lm, lm_link);
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free(lm->f);
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free(lm->t);
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free(lm);
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}
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return;
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}
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void
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lm_fini (void)
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{
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struct lmp *lmp;
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while (!TAILQ_EMPTY(&lmp_head)) {
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lmp = TAILQ_FIRST(&lmp_head);
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TAILQ_REMOVE(&lmp_head, lmp, lmp_link);
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free(lmp->p);
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lm_free(&lmp->lml);
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free(lmp);
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}
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return;
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}
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static void
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lm_add (char *p, char *f, char *t)
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{
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struct lm_list *lml;
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struct lm *lm;
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if (p == NULL)
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p = "$DEFAULT$";
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if ((lml = lmp_find(p)) == NULL)
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2003-05-19 07:10:12 +00:00
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lml = lmp_init(xstrdup(p));
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2003-04-07 16:21:26 +00:00
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2003-05-19 07:10:12 +00:00
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lm = xmalloc(sizeof(struct lm));
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2003-04-07 16:21:26 +00:00
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lm->f = f;
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lm->t = t;
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TAILQ_INSERT_HEAD(lml, lm, lm_link);
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}
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char *
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lm_find (const char *p, const char *f)
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{
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struct lm_list *lml;
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char *t;
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if (p != NULL && (lml = lmp_find(p)) != NULL) {
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t = lml_find(lml, f);
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2003-05-19 07:10:12 +00:00
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if (t != NULL) {
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/*
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* Add a global mapping if we have
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* a successful constrained match.
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*/
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lm_add(NULL, xstrdup(f), xstrdup(t));
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2003-04-07 16:21:26 +00:00
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return (t);
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2003-05-19 07:10:12 +00:00
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}
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2003-04-07 16:21:26 +00:00
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}
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lml = lmp_find("$DEFAULT$");
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if (lml != NULL)
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return (lml_find(lml, f));
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else
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return (NULL);
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}
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static char *
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lml_find (struct lm_list *lmh, const char *f)
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{
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struct lm *lm;
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TAILQ_FOREACH(lm, lmh, lm_link)
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if ((strncmp(f, lm->f, strlen(lm->f)) == 0) &&
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(strlen(f) == strlen(lm->f)))
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return (lm->t);
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return NULL;
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}
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static struct lm_list *
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lmp_find (const char *n)
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{
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struct lmp *lmp;
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TAILQ_FOREACH(lmp, &lmp_head, lmp_link)
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if ((strncmp(n, lmp->p, strlen(lmp->p)) == 0) &&
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(strlen(n) == strlen(lmp->p)))
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return (&lmp->lml);
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return (NULL);
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}
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static struct lm_list *
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lmp_init (char *n)
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{
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struct lmp *lmp;
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2003-05-19 07:10:12 +00:00
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lmp = xmalloc(sizeof(struct lmp));
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2003-04-07 16:21:26 +00:00
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lmp->p = n;
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TAILQ_INIT(&lmp->lml);
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TAILQ_INSERT_HEAD(&lmp_head, lmp, lmp_link);
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return (&lmp->lml);
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}
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2003-05-29 22:58:26 +00:00
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