1fcf53d9bSJohn Marino /*
2f4f4bfd5SJohn Marino * $FreeBSD$
3fcf53d9bSJohn Marino */
4fcf53d9bSJohn Marino
551b1ba8eSJohn Marino #include <sys/types.h>
6fcf53d9bSJohn Marino #include <sys/param.h>
7b2cf2649SJohn Marino #include <sys/fcntl.h>
8b2cf2649SJohn Marino #include <sys/mman.h>
9b2cf2649SJohn Marino #include <sys/queue.h>
10b2cf2649SJohn Marino #include <sys/stat.h>
1151b1ba8eSJohn Marino #include <dirent.h>
12b2cf2649SJohn Marino #include <errno.h>
13b2cf2649SJohn Marino #include <stdlib.h>
14b2cf2649SJohn Marino #include <string.h>
15fcf53d9bSJohn Marino
16fcf53d9bSJohn Marino #include "debug.h"
17fcf53d9bSJohn Marino #include "rtld.h"
18fcf53d9bSJohn Marino #include "libmap.h"
19fcf53d9bSJohn Marino
20fcf53d9bSJohn Marino #ifndef _PATH_LIBMAP_CONF
21fcf53d9bSJohn Marino #define _PATH_LIBMAP_CONF "/etc/libmap.conf"
22fcf53d9bSJohn Marino #endif
23fcf53d9bSJohn Marino
24fcf53d9bSJohn Marino TAILQ_HEAD(lm_list, lm);
25fcf53d9bSJohn Marino struct lm {
26fcf53d9bSJohn Marino char *f;
27fcf53d9bSJohn Marino char *t;
28fcf53d9bSJohn Marino TAILQ_ENTRY(lm) lm_link;
29fcf53d9bSJohn Marino };
30fcf53d9bSJohn Marino
31fcf53d9bSJohn Marino TAILQ_HEAD(lmp_list, lmp) lmp_head = TAILQ_HEAD_INITIALIZER(lmp_head);
32fcf53d9bSJohn Marino struct lmp {
33fcf53d9bSJohn Marino char *p;
34fcf53d9bSJohn Marino enum { T_EXACT=0, T_BASENAME, T_DIRECTORY } type;
35fcf53d9bSJohn Marino struct lm_list lml;
36fcf53d9bSJohn Marino TAILQ_ENTRY(lmp) lmp_link;
37fcf53d9bSJohn Marino };
38fcf53d9bSJohn Marino
3951b1ba8eSJohn Marino static TAILQ_HEAD(lmc_list, lmc) lmc_head = TAILQ_HEAD_INITIALIZER(lmc_head);
4051b1ba8eSJohn Marino struct lmc {
4151b1ba8eSJohn Marino char *path;
4251b1ba8eSJohn Marino TAILQ_ENTRY(lmc) next;
4351b1ba8eSJohn Marino };
4451b1ba8eSJohn Marino
45fcf53d9bSJohn Marino static int lm_count;
46fcf53d9bSJohn Marino
47b2cf2649SJohn Marino static void lmc_parse(char *, size_t);
4851b1ba8eSJohn Marino static void lmc_parse_file(char *);
4951b1ba8eSJohn Marino static void lmc_parse_dir(char *);
50fcf53d9bSJohn Marino static void lm_add(const char *, const char *, const char *);
51fcf53d9bSJohn Marino static void lm_free(struct lm_list *);
52fcf53d9bSJohn Marino static char *lml_find(struct lm_list *, const char *);
53fcf53d9bSJohn Marino static struct lm_list *lmp_find(const char *);
54fcf53d9bSJohn Marino static struct lm_list *lmp_init(char *);
55fcf53d9bSJohn Marino static const char *quickbasename(const char *);
56fcf53d9bSJohn Marino
57fcf53d9bSJohn Marino #define iseol(c) (((c) == '#') || ((c) == '\0') || \
58fcf53d9bSJohn Marino ((c) == '\n') || ((c) == '\r'))
59fcf53d9bSJohn Marino
60b2cf2649SJohn Marino /*
61b2cf2649SJohn Marino * Do not use ctype.h macros, which rely on working TLS. It is
62b2cf2649SJohn Marino * too early to have thread-local variables functional.
63b2cf2649SJohn Marino */
64b2cf2649SJohn Marino #define rtld_isspace(c) ((c) == ' ' || (c) == '\t')
65b2cf2649SJohn Marino
66fcf53d9bSJohn Marino int
lm_init(char * libmap_override)67fcf53d9bSJohn Marino lm_init(char *libmap_override)
68fcf53d9bSJohn Marino {
6951b1ba8eSJohn Marino char *p;
70fcf53d9bSJohn Marino
71b2cf2649SJohn Marino dbg("lm_init(\"%s\")", libmap_override);
72fcf53d9bSJohn Marino TAILQ_INIT(&lmp_head);
73fcf53d9bSJohn Marino
7451b1ba8eSJohn Marino lmc_parse_file(_PATH_LIBMAP_CONF);
75fcf53d9bSJohn Marino
76fcf53d9bSJohn Marino if (libmap_override) {
77b2cf2649SJohn Marino /*
78*b9f3c495SJohn Marino * Do some character replacement to make $LDLIBMAP look
79b2cf2649SJohn Marino * like a text file, then parse it.
80b2cf2649SJohn Marino */
81fcf53d9bSJohn Marino libmap_override = xstrdup(libmap_override);
82fcf53d9bSJohn Marino for (p = libmap_override; *p; p++) {
83fcf53d9bSJohn Marino switch (*p) {
84fcf53d9bSJohn Marino case '=':
85b2cf2649SJohn Marino *p = ' ';
86b2cf2649SJohn Marino break;
87fcf53d9bSJohn Marino case ',':
88b2cf2649SJohn Marino *p = '\n';
89b2cf2649SJohn Marino break;
90fcf53d9bSJohn Marino }
91fcf53d9bSJohn Marino }
92*b9f3c495SJohn Marino lmc_parse(libmap_override, p - libmap_override);
93*b9f3c495SJohn Marino free(libmap_override);
94fcf53d9bSJohn Marino }
95fcf53d9bSJohn Marino
96fcf53d9bSJohn Marino return (lm_count == 0);
97fcf53d9bSJohn Marino }
98fcf53d9bSJohn Marino
99fcf53d9bSJohn Marino static void
lmc_parse_file(char * path)10051b1ba8eSJohn Marino lmc_parse_file(char *path)
10151b1ba8eSJohn Marino {
10251b1ba8eSJohn Marino struct lmc *p;
10351b1ba8eSJohn Marino struct stat st;
10451b1ba8eSJohn Marino int fd;
10551b1ba8eSJohn Marino char *rpath;
10651b1ba8eSJohn Marino char *lm_map;
10751b1ba8eSJohn Marino
10896a1a5d8SJohn Marino rpath = realpath(path, NULL);
10951b1ba8eSJohn Marino if (rpath == NULL)
11051b1ba8eSJohn Marino return;
11151b1ba8eSJohn Marino
11251b1ba8eSJohn Marino TAILQ_FOREACH(p, &lmc_head, next) {
11351b1ba8eSJohn Marino if (strcmp(p->path, rpath) == 0) {
11451b1ba8eSJohn Marino free(rpath);
11551b1ba8eSJohn Marino return;
11651b1ba8eSJohn Marino }
11751b1ba8eSJohn Marino }
11851b1ba8eSJohn Marino
119042953d8SJohn Marino fd = open(rpath, O_RDONLY | O_CLOEXEC);
12051b1ba8eSJohn Marino if (fd == -1) {
12151b1ba8eSJohn Marino dbg("lm_parse_file: open(\"%s\") failed, %s", rpath,
12251b1ba8eSJohn Marino rtld_strerror(errno));
12351b1ba8eSJohn Marino free(rpath);
12451b1ba8eSJohn Marino return;
12551b1ba8eSJohn Marino }
12651b1ba8eSJohn Marino if (fstat(fd, &st) == -1) {
12751b1ba8eSJohn Marino close(fd);
12851b1ba8eSJohn Marino dbg("lm_parse_file: fstat(\"%s\") failed, %s", rpath,
12951b1ba8eSJohn Marino rtld_strerror(errno));
13051b1ba8eSJohn Marino free(rpath);
13151b1ba8eSJohn Marino return;
13251b1ba8eSJohn Marino }
13351b1ba8eSJohn Marino lm_map = mmap(NULL, st.st_size, PROT_READ, MAP_PRIVATE, fd, 0);
13451b1ba8eSJohn Marino if (lm_map == (const char *)MAP_FAILED) {
13551b1ba8eSJohn Marino close(fd);
13651b1ba8eSJohn Marino dbg("lm_parse_file: mmap(\"%s\") failed, %s", rpath,
13751b1ba8eSJohn Marino rtld_strerror(errno));
13851b1ba8eSJohn Marino free(rpath);
13951b1ba8eSJohn Marino return;
14051b1ba8eSJohn Marino }
14151b1ba8eSJohn Marino close(fd);
14251b1ba8eSJohn Marino p = xmalloc(sizeof(struct lmc));
14396a1a5d8SJohn Marino p->path = rpath;
14451b1ba8eSJohn Marino TAILQ_INSERT_HEAD(&lmc_head, p, next);
14551b1ba8eSJohn Marino lmc_parse(lm_map, st.st_size);
14651b1ba8eSJohn Marino munmap(lm_map, st.st_size);
14751b1ba8eSJohn Marino }
14851b1ba8eSJohn Marino
14951b1ba8eSJohn Marino static void
lmc_parse_dir(char * idir)15051b1ba8eSJohn Marino lmc_parse_dir(char *idir)
15151b1ba8eSJohn Marino {
15251b1ba8eSJohn Marino DIR *d;
15351b1ba8eSJohn Marino struct dirent *dp;
15451b1ba8eSJohn Marino struct lmc *p;
15551b1ba8eSJohn Marino char conffile[MAXPATHLEN];
15651b1ba8eSJohn Marino char *ext;
15751b1ba8eSJohn Marino char *rpath;
15851b1ba8eSJohn Marino
15996a1a5d8SJohn Marino rpath = realpath(idir, NULL);
16051b1ba8eSJohn Marino if (rpath == NULL)
16151b1ba8eSJohn Marino return;
16251b1ba8eSJohn Marino
16351b1ba8eSJohn Marino TAILQ_FOREACH(p, &lmc_head, next) {
16451b1ba8eSJohn Marino if (strcmp(p->path, rpath) == 0) {
16551b1ba8eSJohn Marino free(rpath);
16651b1ba8eSJohn Marino return;
16751b1ba8eSJohn Marino }
16851b1ba8eSJohn Marino }
16951b1ba8eSJohn Marino d = opendir(idir);
17051b1ba8eSJohn Marino if (d == NULL) {
17151b1ba8eSJohn Marino free(rpath);
17251b1ba8eSJohn Marino return;
17351b1ba8eSJohn Marino }
17451b1ba8eSJohn Marino
17551b1ba8eSJohn Marino p = xmalloc(sizeof(struct lmc));
17651b1ba8eSJohn Marino p->path = rpath;
17751b1ba8eSJohn Marino TAILQ_INSERT_HEAD(&lmc_head, p, next);
17851b1ba8eSJohn Marino
17951b1ba8eSJohn Marino while ((dp = readdir(d)) != NULL) {
18051b1ba8eSJohn Marino if (dp->d_ino == 0)
18151b1ba8eSJohn Marino continue;
18251b1ba8eSJohn Marino if (dp->d_type != DT_REG)
18351b1ba8eSJohn Marino continue;
18451b1ba8eSJohn Marino ext = strrchr(dp->d_name, '.');
18551b1ba8eSJohn Marino if (ext == NULL)
18651b1ba8eSJohn Marino continue;
18751b1ba8eSJohn Marino if (strcmp(ext, ".conf") != 0)
18851b1ba8eSJohn Marino continue;
18951b1ba8eSJohn Marino if (strlcpy(conffile, idir, MAXPATHLEN) >= MAXPATHLEN)
19051b1ba8eSJohn Marino continue; /* too long */
19151b1ba8eSJohn Marino if (strlcat(conffile, "/", MAXPATHLEN) >= MAXPATHLEN)
19251b1ba8eSJohn Marino continue; /* too long */
19351b1ba8eSJohn Marino if (strlcat(conffile, dp->d_name, MAXPATHLEN) >= MAXPATHLEN)
19451b1ba8eSJohn Marino continue; /* too long */
19551b1ba8eSJohn Marino lmc_parse_file(conffile);
19651b1ba8eSJohn Marino }
19751b1ba8eSJohn Marino closedir(d);
19851b1ba8eSJohn Marino }
19951b1ba8eSJohn Marino
20051b1ba8eSJohn Marino static void
lmc_parse(char * lm_p,size_t lm_len)201b2cf2649SJohn Marino lmc_parse(char *lm_p, size_t lm_len)
202fcf53d9bSJohn Marino {
203b2cf2649SJohn Marino char *cp, *f, *t, *c, *p;
204fcf53d9bSJohn Marino char prog[MAXPATHLEN];
20551b1ba8eSJohn Marino /* allow includedir + full length path */
20651b1ba8eSJohn Marino char line[MAXPATHLEN + 13];
207b2cf2649SJohn Marino size_t cnt;
208b2cf2649SJohn Marino int i;
209fcf53d9bSJohn Marino
210b2cf2649SJohn Marino cnt = 0;
211fcf53d9bSJohn Marino p = NULL;
212b2cf2649SJohn Marino while (cnt < lm_len) {
213b2cf2649SJohn Marino i = 0;
214e0b1d537SSascha Wildner while (cnt < lm_len && lm_p[cnt] != '\n' &&
215b2cf2649SJohn Marino i < sizeof(line) - 1) {
216b2cf2649SJohn Marino line[i] = lm_p[cnt];
217b2cf2649SJohn Marino cnt++;
218b2cf2649SJohn Marino i++;
219b2cf2649SJohn Marino }
220b2cf2649SJohn Marino line[i] = '\0';
221e0b1d537SSascha Wildner while (cnt < lm_len && lm_p[cnt] != '\n')
222b2cf2649SJohn Marino cnt++;
223b2cf2649SJohn Marino /* skip over nl */
224b2cf2649SJohn Marino cnt++;
225b2cf2649SJohn Marino
226b2cf2649SJohn Marino cp = &line[0];
227fcf53d9bSJohn Marino t = f = c = NULL;
228fcf53d9bSJohn Marino
229fcf53d9bSJohn Marino /* Skip over leading space */
230b2cf2649SJohn Marino while (rtld_isspace(*cp)) cp++;
231fcf53d9bSJohn Marino
232fcf53d9bSJohn Marino /* Found a comment or EOL */
233fcf53d9bSJohn Marino if (iseol(*cp)) continue;
234fcf53d9bSJohn Marino
235fcf53d9bSJohn Marino /* Found a constraint selector */
236fcf53d9bSJohn Marino if (*cp == '[') {
237fcf53d9bSJohn Marino cp++;
238fcf53d9bSJohn Marino
239fcf53d9bSJohn Marino /* Skip leading space */
240b2cf2649SJohn Marino while (rtld_isspace(*cp)) cp++;
241fcf53d9bSJohn Marino
242fcf53d9bSJohn Marino /* Found comment, EOL or end of selector */
243fcf53d9bSJohn Marino if (iseol(*cp) || *cp == ']')
244fcf53d9bSJohn Marino continue;
245fcf53d9bSJohn Marino
246fcf53d9bSJohn Marino c = cp++;
247fcf53d9bSJohn Marino /* Skip to end of word */
248b2cf2649SJohn Marino while (!rtld_isspace(*cp) && !iseol(*cp) && *cp != ']')
249fcf53d9bSJohn Marino cp++;
250fcf53d9bSJohn Marino
251fcf53d9bSJohn Marino /* Skip and zero out trailing space */
252b2cf2649SJohn Marino while (rtld_isspace(*cp)) *cp++ = '\0';
253fcf53d9bSJohn Marino
254fcf53d9bSJohn Marino /* Check if there is a closing brace */
255fcf53d9bSJohn Marino if (*cp != ']') continue;
256fcf53d9bSJohn Marino
257fcf53d9bSJohn Marino /* Terminate string if there was no trailing space */
258fcf53d9bSJohn Marino *cp++ = '\0';
259fcf53d9bSJohn Marino
260fcf53d9bSJohn Marino /*
261fcf53d9bSJohn Marino * There should be nothing except whitespace or comment
262fcf53d9bSJohn Marino from this point to the end of the line.
263fcf53d9bSJohn Marino */
264b2cf2649SJohn Marino while(rtld_isspace(*cp)) cp++;
265fcf53d9bSJohn Marino if (!iseol(*cp)) continue;
266fcf53d9bSJohn Marino
26751b1ba8eSJohn Marino if (strlcpy(prog, c, sizeof prog) >= sizeof prog)
26851b1ba8eSJohn Marino continue;
269fcf53d9bSJohn Marino p = prog;
270fcf53d9bSJohn Marino continue;
271fcf53d9bSJohn Marino }
272fcf53d9bSJohn Marino
273fcf53d9bSJohn Marino /* Parse the 'from' candidate. */
274fcf53d9bSJohn Marino f = cp++;
275b2cf2649SJohn Marino while (!rtld_isspace(*cp) && !iseol(*cp)) cp++;
276fcf53d9bSJohn Marino
277fcf53d9bSJohn Marino /* Skip and zero out the trailing whitespace */
278b2cf2649SJohn Marino while (rtld_isspace(*cp)) *cp++ = '\0';
279fcf53d9bSJohn Marino
280fcf53d9bSJohn Marino /* Found a comment or EOL */
281fcf53d9bSJohn Marino if (iseol(*cp)) continue;
282fcf53d9bSJohn Marino
283fcf53d9bSJohn Marino /* Parse 'to' mapping */
284fcf53d9bSJohn Marino t = cp++;
285b2cf2649SJohn Marino while (!rtld_isspace(*cp) && !iseol(*cp)) cp++;
286fcf53d9bSJohn Marino
287fcf53d9bSJohn Marino /* Skip and zero out the trailing whitespace */
288b2cf2649SJohn Marino while (rtld_isspace(*cp)) *cp++ = '\0';
289fcf53d9bSJohn Marino
290fcf53d9bSJohn Marino /* Should be no extra tokens at this point */
291fcf53d9bSJohn Marino if (!iseol(*cp)) continue;
292fcf53d9bSJohn Marino
293fcf53d9bSJohn Marino *cp = '\0';
29451b1ba8eSJohn Marino if (strcmp(f, "includedir") == 0)
29551b1ba8eSJohn Marino lmc_parse_dir(t);
29651b1ba8eSJohn Marino else if (strcmp(f, "include") == 0)
29751b1ba8eSJohn Marino lmc_parse_file(t);
29851b1ba8eSJohn Marino else
299fcf53d9bSJohn Marino lm_add(p, f, t);
300fcf53d9bSJohn Marino }
301fcf53d9bSJohn Marino }
302fcf53d9bSJohn Marino
303fcf53d9bSJohn Marino static void
lm_free(struct lm_list * lml)304fcf53d9bSJohn Marino lm_free (struct lm_list *lml)
305fcf53d9bSJohn Marino {
306fcf53d9bSJohn Marino struct lm *lm;
307fcf53d9bSJohn Marino
308fcf53d9bSJohn Marino dbg("%s(%p)", __func__, lml);
309fcf53d9bSJohn Marino
310fcf53d9bSJohn Marino while (!TAILQ_EMPTY(lml)) {
311fcf53d9bSJohn Marino lm = TAILQ_FIRST(lml);
312fcf53d9bSJohn Marino TAILQ_REMOVE(lml, lm, lm_link);
313fcf53d9bSJohn Marino free(lm->f);
314fcf53d9bSJohn Marino free(lm->t);
315fcf53d9bSJohn Marino free(lm);
316fcf53d9bSJohn Marino }
317fcf53d9bSJohn Marino return;
318fcf53d9bSJohn Marino }
319fcf53d9bSJohn Marino
320fcf53d9bSJohn Marino void
lm_fini(void)321fcf53d9bSJohn Marino lm_fini (void)
322fcf53d9bSJohn Marino {
323fcf53d9bSJohn Marino struct lmp *lmp;
32451b1ba8eSJohn Marino struct lmc *p;
325fcf53d9bSJohn Marino
326fcf53d9bSJohn Marino dbg("%s()", __func__);
327fcf53d9bSJohn Marino
32851b1ba8eSJohn Marino while (!TAILQ_EMPTY(&lmc_head)) {
32951b1ba8eSJohn Marino p = TAILQ_FIRST(&lmc_head);
33051b1ba8eSJohn Marino TAILQ_REMOVE(&lmc_head, p, next);
33151b1ba8eSJohn Marino free(p->path);
33251b1ba8eSJohn Marino free(p);
33351b1ba8eSJohn Marino }
33451b1ba8eSJohn Marino
335fcf53d9bSJohn Marino while (!TAILQ_EMPTY(&lmp_head)) {
336fcf53d9bSJohn Marino lmp = TAILQ_FIRST(&lmp_head);
337fcf53d9bSJohn Marino TAILQ_REMOVE(&lmp_head, lmp, lmp_link);
338fcf53d9bSJohn Marino free(lmp->p);
339fcf53d9bSJohn Marino lm_free(&lmp->lml);
340fcf53d9bSJohn Marino free(lmp);
341fcf53d9bSJohn Marino }
342fcf53d9bSJohn Marino return;
343fcf53d9bSJohn Marino }
344fcf53d9bSJohn Marino
345fcf53d9bSJohn Marino static void
lm_add(const char * p,const char * f,const char * t)346fcf53d9bSJohn Marino lm_add (const char *p, const char *f, const char *t)
347fcf53d9bSJohn Marino {
348fcf53d9bSJohn Marino struct lm_list *lml;
349fcf53d9bSJohn Marino struct lm *lm;
350fcf53d9bSJohn Marino
351fcf53d9bSJohn Marino if (p == NULL)
352fcf53d9bSJohn Marino p = "$DEFAULT$";
353fcf53d9bSJohn Marino
354fcf53d9bSJohn Marino dbg("%s(\"%s\", \"%s\", \"%s\")", __func__, p, f, t);
355fcf53d9bSJohn Marino
356fcf53d9bSJohn Marino if ((lml = lmp_find(p)) == NULL)
357fcf53d9bSJohn Marino lml = lmp_init(xstrdup(p));
358fcf53d9bSJohn Marino
359fcf53d9bSJohn Marino lm = xmalloc(sizeof(struct lm));
360fcf53d9bSJohn Marino lm->f = xstrdup(f);
361fcf53d9bSJohn Marino lm->t = xstrdup(t);
362fcf53d9bSJohn Marino TAILQ_INSERT_HEAD(lml, lm, lm_link);
363fcf53d9bSJohn Marino lm_count++;
364fcf53d9bSJohn Marino }
365fcf53d9bSJohn Marino
366fcf53d9bSJohn Marino char *
lm_find(const char * p,const char * f)367fcf53d9bSJohn Marino lm_find (const char *p, const char *f)
368fcf53d9bSJohn Marino {
369fcf53d9bSJohn Marino struct lm_list *lml;
370fcf53d9bSJohn Marino char *t;
371fcf53d9bSJohn Marino
372fcf53d9bSJohn Marino dbg("%s(\"%s\", \"%s\")", __func__, p, f);
373fcf53d9bSJohn Marino
374fcf53d9bSJohn Marino if (p != NULL && (lml = lmp_find(p)) != NULL) {
375fcf53d9bSJohn Marino t = lml_find(lml, f);
376fcf53d9bSJohn Marino if (t != NULL) {
377fcf53d9bSJohn Marino /*
378fcf53d9bSJohn Marino * Add a global mapping if we have
379fcf53d9bSJohn Marino * a successful constrained match.
380fcf53d9bSJohn Marino */
381fcf53d9bSJohn Marino lm_add(NULL, f, t);
382fcf53d9bSJohn Marino return (t);
383fcf53d9bSJohn Marino }
384fcf53d9bSJohn Marino }
385fcf53d9bSJohn Marino lml = lmp_find("$DEFAULT$");
386fcf53d9bSJohn Marino if (lml != NULL)
387fcf53d9bSJohn Marino return (lml_find(lml, f));
388fcf53d9bSJohn Marino else
389fcf53d9bSJohn Marino return (NULL);
39073ff5bd2SJohn Marino }
39173ff5bd2SJohn Marino
39273ff5bd2SJohn Marino /* Given a libmap translation list and a library name, return the
39373ff5bd2SJohn Marino replacement library, or NULL */
39473ff5bd2SJohn Marino char *
lm_findn(const char * p,const char * f,const int n)39573ff5bd2SJohn Marino lm_findn (const char *p, const char *f, const int n)
39673ff5bd2SJohn Marino {
39773ff5bd2SJohn Marino char pathbuf[64], *s, *t;
39873ff5bd2SJohn Marino
39973ff5bd2SJohn Marino if (n < sizeof(pathbuf) - 1)
40073ff5bd2SJohn Marino s = pathbuf;
40173ff5bd2SJohn Marino else
40273ff5bd2SJohn Marino s = xmalloc(n + 1);
40373ff5bd2SJohn Marino memcpy(s, f, n);
40473ff5bd2SJohn Marino s[n] = '\0';
40573ff5bd2SJohn Marino t = lm_find(p, s);
40673ff5bd2SJohn Marino if (s != pathbuf)
40773ff5bd2SJohn Marino free(s);
40873ff5bd2SJohn Marino return (t);
409fcf53d9bSJohn Marino }
410fcf53d9bSJohn Marino
411fcf53d9bSJohn Marino static char *
lml_find(struct lm_list * lmh,const char * f)412fcf53d9bSJohn Marino lml_find (struct lm_list *lmh, const char *f)
413fcf53d9bSJohn Marino {
414fcf53d9bSJohn Marino struct lm *lm;
415fcf53d9bSJohn Marino
416fcf53d9bSJohn Marino dbg("%s(%p, \"%s\")", __func__, lmh, f);
417fcf53d9bSJohn Marino
418fcf53d9bSJohn Marino TAILQ_FOREACH(lm, lmh, lm_link)
419fcf53d9bSJohn Marino if (strcmp(f, lm->f) == 0)
420fcf53d9bSJohn Marino return (lm->t);
421fcf53d9bSJohn Marino return (NULL);
422fcf53d9bSJohn Marino }
423fcf53d9bSJohn Marino
424fcf53d9bSJohn Marino /* Given an executable name, return a pointer to the translation list or
425fcf53d9bSJohn Marino NULL if no matches */
426fcf53d9bSJohn Marino static struct lm_list *
lmp_find(const char * n)427fcf53d9bSJohn Marino lmp_find (const char *n)
428fcf53d9bSJohn Marino {
429fcf53d9bSJohn Marino struct lmp *lmp;
430fcf53d9bSJohn Marino
431fcf53d9bSJohn Marino dbg("%s(\"%s\")", __func__, n);
432fcf53d9bSJohn Marino
433fcf53d9bSJohn Marino TAILQ_FOREACH(lmp, &lmp_head, lmp_link)
434fcf53d9bSJohn Marino if ((lmp->type == T_EXACT && strcmp(n, lmp->p) == 0) ||
435fcf53d9bSJohn Marino (lmp->type == T_DIRECTORY && strncmp(n, lmp->p, strlen(lmp->p)) == 0) ||
436fcf53d9bSJohn Marino (lmp->type == T_BASENAME && strcmp(quickbasename(n), lmp->p) == 0))
437fcf53d9bSJohn Marino return (&lmp->lml);
438fcf53d9bSJohn Marino return (NULL);
439fcf53d9bSJohn Marino }
440fcf53d9bSJohn Marino
441fcf53d9bSJohn Marino static struct lm_list *
lmp_init(char * n)442fcf53d9bSJohn Marino lmp_init (char *n)
443fcf53d9bSJohn Marino {
444fcf53d9bSJohn Marino struct lmp *lmp;
445fcf53d9bSJohn Marino
446fcf53d9bSJohn Marino dbg("%s(\"%s\")", __func__, n);
447fcf53d9bSJohn Marino
448fcf53d9bSJohn Marino lmp = xmalloc(sizeof(struct lmp));
449fcf53d9bSJohn Marino lmp->p = n;
450fcf53d9bSJohn Marino if (n[strlen(n)-1] == '/')
451fcf53d9bSJohn Marino lmp->type = T_DIRECTORY;
452fcf53d9bSJohn Marino else if (strchr(n,'/') == NULL)
453fcf53d9bSJohn Marino lmp->type = T_BASENAME;
454fcf53d9bSJohn Marino else
455fcf53d9bSJohn Marino lmp->type = T_EXACT;
456fcf53d9bSJohn Marino TAILQ_INIT(&lmp->lml);
457fcf53d9bSJohn Marino TAILQ_INSERT_HEAD(&lmp_head, lmp, lmp_link);
458fcf53d9bSJohn Marino
459fcf53d9bSJohn Marino return (&lmp->lml);
460fcf53d9bSJohn Marino }
461fcf53d9bSJohn Marino
462fcf53d9bSJohn Marino /* libc basename is overkill. Return a pointer to the character after the
463fcf53d9bSJohn Marino last /, or the original string if there are no slashes. */
464fcf53d9bSJohn Marino static const char *
quickbasename(const char * path)465fcf53d9bSJohn Marino quickbasename (const char *path)
466fcf53d9bSJohn Marino {
467fcf53d9bSJohn Marino const char *p = path;
468fcf53d9bSJohn Marino for (; *path; path++) {
469fcf53d9bSJohn Marino if (*path == '/')
470fcf53d9bSJohn Marino p = path+1;
471fcf53d9bSJohn Marino }
472fcf53d9bSJohn Marino return (p);
473fcf53d9bSJohn Marino }
474