20 #ifndef _PATH_LIBMAP_CONF
21 #define _PATH_LIBMAP_CONF "/etc/libmap.conf"
24 TAILQ_HEAD(lm_list, lm);
28 TAILQ_ENTRY(lm) lm_link;
31 TAILQ_HEAD(lmp_list, lmp) lmp_head = TAILQ_HEAD_INITIALIZER(lmp_head);
34 enum { T_EXACT=0, T_BASENAME, T_DIRECTORY } type;
36 TAILQ_ENTRY(lmp) lmp_link;
39 static TAILQ_HEAD(lmc_list, lmc) lmc_head = TAILQ_HEAD_INITIALIZER(lmc_head);
42 TAILQ_ENTRY(lmc) next;
47 static void lmc_parse(char *, size_t);
48 static void lmc_parse_file(char *);
49 static void lmc_parse_dir(char *);
50 static void lm_add(const char *, const char *, const char *);
51 static void lm_free(struct lm_list *);
52 static char *lml_find(struct lm_list *, const char *);
53 static struct lm_list *lmp_find(const char *);
54 static struct lm_list *lmp_init(char *);
55 static const char *quickbasename(const char *);
57 #define iseol(c) (((c) == '#') || ((c) == '\0') || \
58 ((c) == '\n') || ((c) == '\r'))
61 * Do not use ctype.h macros, which rely on working TLS. It is
62 * too early to have thread-local variables functional.
64 #define rtld_isspace(c) ((c) == ' ' || (c) == '\t')
67 lm_init(char *libmap_override)
71 dbg("lm_init(\"%s\")", libmap_override);
72 TAILQ_INIT(&lmp_head);
74 lmc_parse_file(_PATH_LIBMAP_CONF);
76 if (libmap_override) {
78 * Do some character replacement to make $LIBMAP look
79 * like a text file, then parse it.
81 libmap_override = xstrdup(libmap_override);
82 for (p = libmap_override; *p; p++) {
92 lmc_parse(p, strlen(p));
96 return (lm_count == 0);
100 lmc_parse_file(char *path)
108 rpath = realpath(path, NULL);
112 TAILQ_FOREACH(p, &lmc_head, next) {
113 if (strcmp(p->path, rpath) == 0) {
119 fd = open(rpath, O_RDONLY);
121 dbg("lm_parse_file: open(\"%s\") failed, %s", rpath,
122 rtld_strerror(errno));
126 if (fstat(fd, &st) == -1) {
128 dbg("lm_parse_file: fstat(\"%s\") failed, %s", rpath,
129 rtld_strerror(errno));
133 lm_map = mmap(NULL, st.st_size, PROT_READ, MAP_PRIVATE, fd, 0);
134 if (lm_map == (const char *)MAP_FAILED) {
136 dbg("lm_parse_file: mmap(\"%s\") failed, %s", rpath,
137 rtld_strerror(errno));
142 p = xmalloc(sizeof(struct lmc));
144 TAILQ_INSERT_HEAD(&lmc_head, p, next);
145 lmc_parse(lm_map, st.st_size);
146 munmap(lm_map, st.st_size);
150 lmc_parse_dir(char *idir)
155 char conffile[MAXPATHLEN];
159 rpath = realpath(idir, NULL);
163 TAILQ_FOREACH(p, &lmc_head, next) {
164 if (strcmp(p->path, rpath) == 0) {
175 p = xmalloc(sizeof(struct lmc));
177 TAILQ_INSERT_HEAD(&lmc_head, p, next);
179 while ((dp = readdir(d)) != NULL) {
182 if (dp->d_type != DT_REG)
184 ext = strrchr(dp->d_name, '.');
187 if (strcmp(ext, ".conf") != 0)
189 if (strlcpy(conffile, idir, MAXPATHLEN) >= MAXPATHLEN)
190 continue; /* too long */
191 if (strlcat(conffile, "/", MAXPATHLEN) >= MAXPATHLEN)
192 continue; /* too long */
193 if (strlcat(conffile, dp->d_name, MAXPATHLEN) >= MAXPATHLEN)
194 continue; /* too long */
195 lmc_parse_file(conffile);
201 lmc_parse(char *lm_p, size_t lm_len)
203 char *cp, *f, *t, *c, *p;
204 char prog[MAXPATHLEN];
205 /* allow includedir + full length path */
206 char line[MAXPATHLEN + 13];
212 while (cnt < lm_len) {
214 while (lm_p[cnt] != '\n' && cnt < lm_len &&
215 i < sizeof(line) - 1) {
221 while (lm_p[cnt] != '\n' && cnt < lm_len)
229 /* Skip over leading space */
230 while (rtld_isspace(*cp)) cp++;
232 /* Found a comment or EOL */
233 if (iseol(*cp)) continue;
235 /* Found a constraint selector */
239 /* Skip leading space */
240 while (rtld_isspace(*cp)) cp++;
242 /* Found comment, EOL or end of selector */
243 if (iseol(*cp) || *cp == ']')
247 /* Skip to end of word */
248 while (!rtld_isspace(*cp) && !iseol(*cp) && *cp != ']')
251 /* Skip and zero out trailing space */
252 while (rtld_isspace(*cp)) *cp++ = '\0';
254 /* Check if there is a closing brace */
255 if (*cp != ']') continue;
257 /* Terminate string if there was no trailing space */
261 * There should be nothing except whitespace or comment
262 from this point to the end of the line.
264 while(rtld_isspace(*cp)) cp++;
265 if (!iseol(*cp)) continue;
267 if (strlcpy(prog, c, sizeof prog) >= sizeof prog)
273 /* Parse the 'from' candidate. */
275 while (!rtld_isspace(*cp) && !iseol(*cp)) cp++;
277 /* Skip and zero out the trailing whitespace */
278 while (rtld_isspace(*cp)) *cp++ = '\0';
280 /* Found a comment or EOL */
281 if (iseol(*cp)) continue;
283 /* Parse 'to' mapping */
285 while (!rtld_isspace(*cp) && !iseol(*cp)) cp++;
287 /* Skip and zero out the trailing whitespace */
288 while (rtld_isspace(*cp)) *cp++ = '\0';
290 /* Should be no extra tokens at this point */
291 if (!iseol(*cp)) continue;
294 if (strcmp(f, "includedir") == 0)
296 else if (strcmp(f, "include") == 0)
304 lm_free (struct lm_list *lml)
308 dbg("%s(%p)", __func__, lml);
310 while (!TAILQ_EMPTY(lml)) {
311 lm = TAILQ_FIRST(lml);
312 TAILQ_REMOVE(lml, lm, lm_link);
326 dbg("%s()", __func__);
328 while (!TAILQ_EMPTY(&lmc_head)) {
329 p = TAILQ_FIRST(&lmc_head);
330 TAILQ_REMOVE(&lmc_head, p, next);
335 while (!TAILQ_EMPTY(&lmp_head)) {
336 lmp = TAILQ_FIRST(&lmp_head);
337 TAILQ_REMOVE(&lmp_head, lmp, lmp_link);
346 lm_add (const char *p, const char *f, const char *t)
354 dbg("%s(\"%s\", \"%s\", \"%s\")", __func__, p, f, t);
356 if ((lml = lmp_find(p)) == NULL)
357 lml = lmp_init(xstrdup(p));
359 lm = xmalloc(sizeof(struct lm));
362 TAILQ_INSERT_HEAD(lml, lm, lm_link);
367 lm_find (const char *p, const char *f)
372 dbg("%s(\"%s\", \"%s\")", __func__, p, f);
374 if (p != NULL && (lml = lmp_find(p)) != NULL) {
375 t = lml_find(lml, f);
378 * Add a global mapping if we have
379 * a successful constrained match.
385 lml = lmp_find("$DEFAULT$");
387 return (lml_find(lml, f));
393 lml_find (struct lm_list *lmh, const char *f)
397 dbg("%s(%p, \"%s\")", __func__, lmh, f);
399 TAILQ_FOREACH(lm, lmh, lm_link)
400 if (strcmp(f, lm->f) == 0)
405 /* Given an executable name, return a pointer to the translation list or
406 NULL if no matches */
407 static struct lm_list *
408 lmp_find (const char *n)
412 dbg("%s(\"%s\")", __func__, n);
414 TAILQ_FOREACH(lmp, &lmp_head, lmp_link)
415 if ((lmp->type == T_EXACT && strcmp(n, lmp->p) == 0) ||
416 (lmp->type == T_DIRECTORY && strncmp(n, lmp->p, strlen(lmp->p)) == 0) ||
417 (lmp->type == T_BASENAME && strcmp(quickbasename(n), lmp->p) == 0))
422 static struct lm_list *
427 dbg("%s(\"%s\")", __func__, n);
429 lmp = xmalloc(sizeof(struct lmp));
431 if (n[strlen(n)-1] == '/')
432 lmp->type = T_DIRECTORY;
433 else if (strchr(n,'/') == NULL)
434 lmp->type = T_BASENAME;
437 TAILQ_INIT(&lmp->lml);
438 TAILQ_INSERT_HEAD(&lmp_head, lmp, lmp_link);
443 /* libc basename is overkill. Return a pointer to the character after the
444 last /, or the original string if there are no slashes. */
446 quickbasename (const char *path)
448 const char *p = path;
449 for (; *path; path++) {