-/* $Id: apropos.c,v 1.17 2011/11/20 21:36:00 kristaps Exp $ */
+/* $Id: apropos.c,v 1.30 2012/03/24 02:18:51 kristaps Exp $ */
/*
- * Copyright (c) 2011 Kristaps Dzonsons <kristaps@bsd.lv>
+ * Copyright (c) 2011, 2012 Kristaps Dzonsons <kristaps@bsd.lv>
* Copyright (c) 2011 Ingo Schwarze <schwarze@openbsd.org>
*
* Permission to use, copy, modify, and distribute this software for any
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
+#include <sys/param.h>
#include <assert.h>
-#include <ctype.h>
#include <getopt.h>
-#include <limits.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
+#include <unistd.h>
#include "apropos_db.h"
#include "mandoc.h"
+#include "manpath.h"
-/*
- * FIXME: add support for manpath(1), which everybody but OpenBSD and
- * NetBSD seem to use.
- */
-#define MAN_CONF_FILE "/etc/man.conf"
-#define MAN_CONF_KEY "_whatdb"
-
-/*
- * List of paths to be searched for manual databases.
- */
-struct manpaths {
- int sz;
- char **paths;
-};
+#define SINGLETON(_res, _sz) \
+ ((_sz) && (_res)[0].matched && \
+ (1 == (_sz) || 0 == (_res)[1].matched))
+#define EMPTYSET(_res, _sz) \
+ ((0 == (_sz)) || 0 == (_res)[0].matched)
static int cmp(const void *, const void *);
static void list(struct res *, size_t, void *);
-static void manpath_add(struct manpaths *, const char *);
-static void manpath_parse(struct manpaths *, char *);
-static void manpath_parseconf(struct manpaths *);
static void usage(void);
static char *progname;
int
main(int argc, char *argv[])
{
- int i, ch, rc;
+ int ch, rc, whatis, usecat;
+ struct res *res;
struct manpaths paths;
- size_t terms;
+ const char *prog;
+ pid_t pid;
+ char path[PATH_MAX];
+ int fds[2];
+ size_t terms, ressz, sz;
struct opts opts;
struct expr *e;
- char *defpaths, *auxpaths;
+ char *defpaths, *auxpaths, *conf_file, *cp;
extern int optind;
extern char *optarg;
else
++progname;
+ whatis = 0 == strncmp(progname, "whatis", 6);
+
memset(&paths, 0, sizeof(struct manpaths));
memset(&opts, 0, sizeof(struct opts));
+ usecat = 0;
+ ressz = 0;
+ res = NULL;
auxpaths = defpaths = NULL;
+ conf_file = NULL;
e = NULL;
- rc = 0;
+ path[0] = '\0';
- while (-1 != (ch = getopt(argc, argv, "M:m:S:s:")))
+ while (-1 != (ch = getopt(argc, argv, "C:M:m:S:s:")))
switch (ch) {
+ case ('C'):
+ conf_file = optarg;
+ break;
case ('M'):
defpaths = optarg;
break;
break;
default:
usage();
- goto out;
+ return(EXIT_FAILURE);
}
argc -= optind;
argv += optind;
- if (0 == argc) {
- rc = 1;
- goto out;
- }
-
- if (NULL != getenv("MANPATH"))
- defpaths = getenv("MANPATH");
+ if (0 == argc)
+ return(EXIT_SUCCESS);
- if (NULL == defpaths)
- manpath_parseconf(&paths);
- else
- manpath_parse(&paths, defpaths);
+ rc = 0;
- manpath_parse(&paths, auxpaths);
+ manpath_parse(&paths, conf_file, defpaths, auxpaths);
- if (NULL == (e = exprcomp(argc, argv, &terms))) {
+ e = whatis ? termcomp(argc, argv, &terms) :
+ exprcomp(argc, argv, &terms);
+
+ if (NULL == e) {
fprintf(stderr, "%s: Bad expression\n", progname);
goto out;
}
rc = apropos_search
- (paths.sz, paths.paths,
- &opts, e, terms, NULL, list);
+ (paths.sz, paths.paths, &opts,
+ e, terms, NULL, &ressz, &res, list);
- if (0 == rc)
- fprintf(stderr, "%s: Error reading "
- "manual database\n", progname);
+ terms = 1;
-out:
- for (i = 0; i < paths.sz; i++)
- free(paths.paths[i]);
+ if (0 == rc) {
+ fprintf(stderr, "%s: Bad database\n", progname);
+ goto out;
+ } else if ( ! isatty(STDOUT_FILENO) || EMPTYSET(res, ressz))
+ goto out;
+
+ if ( ! SINGLETON(res, ressz)) {
+ printf("Which manpage would you like [1]? ");
+ fflush(stdout);
+ if (NULL != (cp = fgetln(stdin, &sz)) &&
+ sz > 1 && '\n' == cp[--sz]) {
+ if ((ch = atoi(cp)) <= 0)
+ goto out;
+ terms = (size_t)ch;
+ }
+ }
- free(paths.paths);
+ if (--terms < ressz && res[terms].matched) {
+ chdir(paths.paths[res[terms].volume]);
+ strlcpy(path, res[terms].file, PATH_MAX);
+ usecat = RESTYPE_CAT == res[terms].type;
+ }
+out:
+ manpath_free(&paths);
+ resfree(res, ressz);
exprfree(e);
- return(rc ? EXIT_SUCCESS : EXIT_FAILURE);
+ if ('\0' == path[0])
+ return(rc ? EXIT_SUCCESS : EXIT_FAILURE);
+
+ if (-1 == pipe(fds)) {
+ perror(NULL);
+ exit(EXIT_FAILURE);
+ }
+
+ if (-1 == (pid = fork())) {
+ perror(NULL);
+ exit(EXIT_FAILURE);
+ } else if (pid > 0) {
+ dup2(fds[0], STDIN_FILENO);
+ close(fds[1]);
+ prog = NULL != getenv("MANPAGER") ?
+ getenv("MANPAGER") :
+ (NULL != getenv("PAGER") ?
+ getenv("PAGER") : "more");
+ execlp(prog, prog, (char *)NULL);
+ perror(prog);
+ return(EXIT_FAILURE);
+ }
+
+ dup2(fds[1], STDOUT_FILENO);
+ close(fds[0]);
+ prog = usecat ? "cat" : "mandoc";
+ execlp(prog, prog, path, (char *)NULL);
+ perror(prog);
+ return(EXIT_FAILURE);
}
/* ARGSUSED */
static void
list(struct res *res, size_t sz, void *arg)
{
- int i;
+ size_t i;
qsort(res, sz, sizeof(struct res), cmp);
- for (i = 0; i < (int)sz; i++)
- printf("%s(%s%s%s) - %s\n", res[i].title,
- res[i].cat,
- *res[i].arch ? "/" : "",
- *res[i].arch ? res[i].arch : "",
- res[i].desc);
+ if (EMPTYSET(res, sz) || SINGLETON(res, sz))
+ return;
+
+ if ( ! isatty(STDOUT_FILENO))
+ for (i = 0; i < sz && res[i].matched; i++)
+ printf("%s(%s%s%s) - %.70s\n",
+ res[i].title, res[i].cat,
+ *res[i].arch ? "/" : "",
+ *res[i].arch ? res[i].arch : "",
+ res[i].desc);
+ else
+ for (i = 0; i < sz && res[i].matched; i++)
+ printf("[%zu] %s(%s%s%s) - %.70s\n", i + 1,
+ res[i].title, res[i].cat,
+ *res[i].arch ? "/" : "",
+ *res[i].arch ? res[i].arch : "",
+ res[i].desc);
}
static int
cmp(const void *p1, const void *p2)
{
+ const struct res *r1 = p1;
+ const struct res *r2 = p2;
+
+ if (0 == r1->matched)
+ return(1);
+ else if (0 == r2->matched)
+ return(1);
- return(strcmp(((const struct res *)p1)->title,
- ((const struct res *)p2)->title));
+ return(strcasecmp(r1->title, r2->title));
}
static void
{
fprintf(stderr, "usage: %s "
- "[-M dirs] "
- "[-m dirs] "
+ "[-C file] "
+ "[-M manpath] "
+ "[-m manpath] "
"[-S arch] "
"[-s section] "
- "expression...\n", progname);
-}
-
-/*
- * Parse a FULL pathname from a colon-separated list of arrays.
- */
-static void
-manpath_parse(struct manpaths *dirs, char *path)
-{
- char *dir;
-
- if (NULL == path)
- return;
-
- for (dir = strtok(path, ":"); dir; dir = strtok(NULL, ":"))
- manpath_add(dirs, dir);
-}
-
-/*
- * Add a directory to the array, ignoring bad directories.
- * Grow the array one-by-one for simplicity's sake.
- */
-static void
-manpath_add(struct manpaths *dirs, const char *dir)
-{
- char buf[PATH_MAX];
- char *cp;
- int i;
-
- if (NULL == (cp = realpath(dir, buf)))
- return;
-
- for (i = 0; i < dirs->sz; i++)
- if (0 == strcmp(dirs->paths[i], dir))
- return;
-
- dirs->paths = mandoc_realloc
- (dirs->paths,
- ((size_t)dirs->sz + 1) * sizeof(char *));
-
- dirs->paths[dirs->sz++] = mandoc_strdup(cp);
-}
-
-static void
-manpath_parseconf(struct manpaths *dirs)
-{
- FILE *stream;
-#ifdef USE_MANPATH
- char *buf;
- size_t sz, bsz;
-
- stream = popen("manpath", "r");
- if (NULL == stream)
- return;
-
- buf = NULL;
- bsz = 0;
-
- do {
- buf = mandoc_realloc(buf, bsz + 1024);
- sz = fread(buf + (int)bsz, 1, 1024, stream);
- bsz += sz;
- } while (sz > 0);
-
- assert(bsz && '\n' == buf[bsz - 1]);
- buf[bsz - 1] = '\0';
-
- manpath_parse(dirs, buf);
- free(buf);
- pclose(stream);
-#else
- char *p, *q;
- size_t len, keysz;
-
- keysz = strlen(MAN_CONF_KEY);
- assert(keysz > 0);
-
- if (NULL == (stream = fopen(MAN_CONF_FILE, "r")))
- return;
-
- while (NULL != (p = fgetln(stream, &len))) {
- if (0 == len || '\n' == p[--len])
- break;
- p[len] = '\0';
- while (isspace((unsigned char)*p))
- p++;
- if (strncmp(MAN_CONF_KEY, p, keysz))
- continue;
- p += keysz;
- while (isspace(*p))
- p++;
- if ('\0' == *p)
- continue;
- if (NULL == (q = strrchr(p, '/')))
- continue;
- *q = '\0';
- manpath_add(dirs, p);
- }
-
- fclose(stream);
-#endif
+ "expression ...\n",
+ progname);
}
git.ckatri.com / mandoc.git / blobdiff