c454c57163
The current implementation of sysctlbyname() does not support the user sub-tree. This function exits with a return value of 0, but sets the passed string buffer to an empty string. As a result, the whereis program did not use the value of the sysctl variable "user.cs_path", but only the value of the environment variable "PATH". This update makes whereis use the sysctl function with a fixed OID, which already supports the user sub-tree. MFC after: 3 days
692 lines
16 KiB
C
692 lines
16 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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* Copyright © 2002, Jörg Wunsch
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT,
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* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* 4.3BSD UI-compatible whereis(1) utility. Rewritten from scratch
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* since the original 4.3BSD version suffers legal problems that
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* prevent it from being redistributed, and since the 4.4BSD version
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* was pretty inferior in functionality.
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*/
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#include <sys/types.h>
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__FBSDID("$FreeBSD$");
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#include <sys/stat.h>
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#include <sys/sysctl.h>
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#include <dirent.h>
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#include <err.h>
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#include <errno.h>
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#include <locale.h>
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#include <regex.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sysexits.h>
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#include <unistd.h>
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#include "pathnames.h"
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#define NO_BIN_FOUND 1
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#define NO_MAN_FOUND 2
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#define NO_SRC_FOUND 4
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typedef const char *ccharp;
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static int opt_a, opt_b, opt_m, opt_q, opt_s, opt_u, opt_x;
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static ccharp *bindirs, *mandirs, *sourcedirs;
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static char **query;
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static const char *sourcepath = PATH_SOURCES;
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static char *colonify(ccharp *);
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static int contains(ccharp *, const char *);
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static void decolonify(char *, ccharp **, int *);
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static void defaults(void);
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static void scanopts(int, char **);
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static void usage(void);
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/*
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* Throughout this program, a number of strings are dynamically
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* allocated but never freed. Their memory is written to when
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* splitting the strings into string lists which will later be
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* processed. Since it's important that those string lists remain
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* valid even after the functions allocating the memory returned,
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* those functions cannot free them. They could be freed only at end
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* of main(), which is pretty pointless anyway.
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*
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* The overall amount of memory to be allocated for processing the
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* strings is not expected to exceed a few kilobytes. For that
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* reason, allocation can usually always be assumed to succeed (within
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* a virtual memory environment), thus we simply bail out using
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* abort(3) in case of an allocation failure.
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*/
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static void
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usage(void)
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{
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(void)fprintf(stderr,
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"usage: whereis [-abmqsux] [-BMS dir ... -f] program ...\n");
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exit(EX_USAGE);
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}
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/*
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* Scan options passed to program.
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*
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* Note that the -B/-M/-S options expect a list of directory
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* names that must be terminated with -f.
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*/
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static void
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scanopts(int argc, char **argv)
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{
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int c, i;
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ccharp **dirlist;
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while ((c = getopt(argc, argv, "BMSabfmqsux")) != -1)
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switch (c) {
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case 'B':
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dirlist = &bindirs;
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goto dolist;
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case 'M':
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dirlist = &mandirs;
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goto dolist;
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case 'S':
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dirlist = &sourcedirs;
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dolist:
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i = 0;
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*dirlist = realloc(*dirlist, (i + 1) * sizeof(char *));
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(*dirlist)[i] = NULL;
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while (optind < argc &&
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strcmp(argv[optind], "-f") != 0 &&
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strcmp(argv[optind], "-B") != 0 &&
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strcmp(argv[optind], "-M") != 0 &&
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strcmp(argv[optind], "-S") != 0) {
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decolonify(argv[optind], dirlist, &i);
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optind++;
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}
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break;
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case 'a':
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opt_a = 1;
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break;
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case 'b':
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opt_b = 1;
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break;
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case 'f':
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goto breakout;
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case 'm':
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opt_m = 1;
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break;
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case 'q':
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opt_q = 1;
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break;
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case 's':
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opt_s = 1;
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break;
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case 'u':
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opt_u = 1;
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break;
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case 'x':
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opt_x = 1;
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break;
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default:
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usage();
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}
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breakout:
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if (optind == argc)
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usage();
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query = argv + optind;
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}
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/*
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* Find out whether string `s' is contained in list `cpp'.
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*/
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static int
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contains(ccharp *cpp, const char *s)
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{
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ccharp cp;
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if (cpp == NULL)
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return (0);
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while ((cp = *cpp) != NULL) {
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if (strcmp(cp, s) == 0)
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return (1);
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cpp++;
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}
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return (0);
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}
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/*
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* Split string `s' at colons, and pass it to the string list pointed
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* to by `cppp' (which has `*ip' elements). Note that the original
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* string is modified by replacing the colon with a NUL byte. The
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* partial string is only added if it has a length greater than 0, and
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* if it's not already contained in the string list.
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*/
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static void
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decolonify(char *s, ccharp **cppp, int *ip)
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{
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char *cp;
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while ((cp = strchr(s, ':')), *s != '\0') {
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if (cp)
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*cp = '\0';
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if (strlen(s) && !contains(*cppp, s)) {
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*cppp = realloc(*cppp, (*ip + 2) * sizeof(char *));
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if (*cppp == NULL)
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abort();
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(*cppp)[*ip] = s;
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(*cppp)[*ip + 1] = NULL;
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(*ip)++;
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}
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if (cp)
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s = cp + 1;
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else
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break;
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}
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}
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/*
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* Join string list `cpp' into a colon-separated string.
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*/
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static char *
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colonify(ccharp *cpp)
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{
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size_t s;
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char *cp;
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int i;
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if (cpp == NULL)
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return (0);
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for (s = 0, i = 0; cpp[i] != NULL; i++)
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s += strlen(cpp[i]) + 1;
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if ((cp = malloc(s + 1)) == NULL)
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abort();
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for (i = 0, *cp = '\0'; cpp[i] != NULL; i++) {
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strcat(cp, cpp[i]);
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strcat(cp, ":");
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}
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cp[s - 1] = '\0'; /* eliminate last colon */
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return (cp);
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}
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/*
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* Provide defaults for all options and directory lists.
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*/
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static void
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defaults(void)
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{
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size_t s;
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char *b, buf[BUFSIZ], *cp;
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int nele;
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FILE *p;
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DIR *dir;
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struct stat sb;
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struct dirent *dirp;
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const int oid[2] = {CTL_USER, USER_CS_PATH};
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/* default to -bms if none has been specified */
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if (!opt_b && !opt_m && !opt_s)
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opt_b = opt_m = opt_s = 1;
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/* -b defaults to default path + /usr/libexec +
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* user's path */
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if (!bindirs) {
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if (sysctl(oid, 2, NULL, &s, NULL, 0) == -1)
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err(EX_OSERR, "sysctl(\"user.cs_path\")");
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if ((b = malloc(s + 1)) == NULL)
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abort();
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if (sysctl(oid, 2, b, &s, NULL, 0) == -1)
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err(EX_OSERR, "sysctl(\"user.cs_path\")");
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nele = 0;
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decolonify(b, &bindirs, &nele);
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bindirs = realloc(bindirs, (nele + 2) * sizeof(char *));
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if (bindirs == NULL)
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abort();
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bindirs[nele++] = PATH_LIBEXEC;
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bindirs[nele] = NULL;
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if ((cp = getenv("PATH")) != NULL) {
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/* don't destroy the original environment... */
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b = strdup(cp);
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if (b == NULL)
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abort();
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decolonify(b, &bindirs, &nele);
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}
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}
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/* -m defaults to $(manpath) */
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if (!mandirs) {
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if ((p = popen(MANPATHCMD, "r")) == NULL)
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err(EX_OSERR, "cannot execute manpath command");
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if (fgets(buf, BUFSIZ - 1, p) == NULL ||
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pclose(p))
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err(EX_OSERR, "error processing manpath results");
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if ((b = strchr(buf, '\n')) != NULL)
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*b = '\0';
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b = strdup(buf);
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if (b == NULL)
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abort();
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nele = 0;
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decolonify(b, &mandirs, &nele);
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}
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/* -s defaults to precompiled list, plus subdirs of /usr/ports */
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if (!sourcedirs) {
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b = strdup(sourcepath);
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if (b == NULL)
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abort();
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nele = 0;
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decolonify(b, &sourcedirs, &nele);
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if (stat(PATH_PORTS, &sb) == -1) {
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if (errno == ENOENT)
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/* no /usr/ports, we are done */
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return;
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err(EX_OSERR, "stat(" PATH_PORTS ")");
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}
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if ((sb.st_mode & S_IFMT) != S_IFDIR)
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/* /usr/ports is not a directory, ignore */
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return;
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if (access(PATH_PORTS, R_OK | X_OK) != 0)
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return;
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if ((dir = opendir(PATH_PORTS)) == NULL)
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err(EX_OSERR, "opendir" PATH_PORTS ")");
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while ((dirp = readdir(dir)) != NULL) {
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/*
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* Not everything below PATH_PORTS is of
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* interest. First, all dot files and
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* directories (e. g. .snap) can be ignored.
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* Also, all subdirectories starting with a
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* capital letter are not going to be
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* examined, as they are used for internal
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* purposes (Mk, Tools, ...). This also
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* matches a possible CVS subdirectory.
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* Finally, the distfiles subdirectory is also
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* special, and should not be considered to
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* avoid false matches.
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*/
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if (dirp->d_name[0] == '.' ||
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/*
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* isupper() not used on purpose: the
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* check is supposed to default to the C
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* locale instead of the current user's
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* locale.
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*/
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(dirp->d_name[0] >= 'A' && dirp->d_name[0] <= 'Z') ||
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strcmp(dirp->d_name, "distfiles") == 0)
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continue;
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if ((b = malloc(sizeof PATH_PORTS + 1 + dirp->d_namlen))
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== NULL)
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abort();
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strcpy(b, PATH_PORTS);
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strcat(b, "/");
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strcat(b, dirp->d_name);
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if (stat(b, &sb) == -1 ||
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(sb.st_mode & S_IFMT) != S_IFDIR ||
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access(b, R_OK | X_OK) != 0) {
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free(b);
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continue;
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}
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sourcedirs = realloc(sourcedirs,
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(nele + 2) * sizeof(char *));
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if (sourcedirs == NULL)
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abort();
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sourcedirs[nele++] = b;
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sourcedirs[nele] = NULL;
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}
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closedir(dir);
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}
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}
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int
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main(int argc, char **argv)
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{
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int unusual, i, printed;
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char *bin, buf[BUFSIZ], *cp, *cp2, *man, *name, *src;
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ccharp *dp;
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size_t nlen, olen, s;
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struct stat sb;
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regex_t re, re2;
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regmatch_t matches[2];
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regoff_t rlen;
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FILE *p;
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setlocale(LC_ALL, "");
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scanopts(argc, argv);
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defaults();
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if (mandirs == NULL)
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opt_m = 0;
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if (bindirs == NULL)
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opt_b = 0;
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if (sourcedirs == NULL)
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opt_s = 0;
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if (opt_m + opt_b + opt_s == 0)
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errx(EX_DATAERR, "no directories to search");
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if (opt_m) {
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setenv("MANPATH", colonify(mandirs), 1);
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if ((i = regcomp(&re, MANWHEREISMATCH, REG_EXTENDED)) != 0) {
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regerror(i, &re, buf, BUFSIZ - 1);
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errx(EX_UNAVAILABLE, "regcomp(%s) failed: %s",
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MANWHEREISMATCH, buf);
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}
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}
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for (; (name = *query) != NULL; query++) {
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/* strip leading path name component */
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if ((cp = strrchr(name, '/')) != NULL)
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name = cp + 1;
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/* strip SCCS or RCS suffix/prefix */
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if (strlen(name) > 2 && strncmp(name, "s.", 2) == 0)
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name += 2;
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if ((s = strlen(name)) > 2 && strcmp(name + s - 2, ",v") == 0)
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name[s - 2] = '\0';
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/* compression suffix */
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s = strlen(name);
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if (s > 2 &&
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(strcmp(name + s - 2, ".z") == 0 ||
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strcmp(name + s - 2, ".Z") == 0))
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name[s - 2] = '\0';
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else if (s > 3 &&
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strcmp(name + s - 3, ".gz") == 0)
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name[s - 3] = '\0';
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else if (s > 4 &&
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strcmp(name + s - 4, ".bz2") == 0)
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name[s - 4] = '\0';
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unusual = 0;
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bin = man = src = NULL;
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s = strlen(name);
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if (opt_b) {
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/*
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* Binaries have to match exactly, and must be regular
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* executable files.
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*/
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unusual = unusual | NO_BIN_FOUND;
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for (dp = bindirs; *dp != NULL; dp++) {
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cp = malloc(strlen(*dp) + 1 + s + 1);
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if (cp == NULL)
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abort();
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strcpy(cp, *dp);
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strcat(cp, "/");
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strcat(cp, name);
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if (stat(cp, &sb) == 0 &&
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(sb.st_mode & S_IFMT) == S_IFREG &&
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(sb.st_mode & (S_IXUSR | S_IXGRP | S_IXOTH))
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!= 0) {
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unusual = unusual & ~NO_BIN_FOUND;
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if (bin == NULL) {
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bin = strdup(cp);
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} else {
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olen = strlen(bin);
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nlen = strlen(cp);
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bin = realloc(bin,
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olen + nlen + 2);
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if (bin == NULL)
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abort();
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strcat(bin, " ");
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strcat(bin, cp);
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}
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if (!opt_a) {
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free(cp);
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break;
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}
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}
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free(cp);
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}
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}
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if (opt_m) {
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/*
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* Ask the man command to perform the search for us.
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*/
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unusual = unusual | NO_MAN_FOUND;
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if (opt_a)
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cp = malloc(sizeof MANWHEREISALLCMD - 2 + s);
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else
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cp = malloc(sizeof MANWHEREISCMD - 2 + s);
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if (cp == NULL)
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abort();
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if (opt_a)
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sprintf(cp, MANWHEREISALLCMD, name);
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else
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sprintf(cp, MANWHEREISCMD, name);
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if ((p = popen(cp, "r")) != NULL) {
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while (fgets(buf, BUFSIZ - 1, p) != NULL) {
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unusual = unusual & ~NO_MAN_FOUND;
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if ((cp2 = strchr(buf, '\n')) != NULL)
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*cp2 = '\0';
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if (regexec(&re, buf, 2,
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matches, 0) == 0 &&
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(rlen = matches[1].rm_eo -
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matches[1].rm_so) > 0) {
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/*
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* man -w found formatted
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* page, need to pick up
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* source page name.
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*/
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cp2 = malloc(rlen + 1);
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if (cp2 == NULL)
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abort();
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memcpy(cp2,
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buf + matches[1].rm_so,
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rlen);
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cp2[rlen] = '\0';
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} else {
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/*
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* man -w found plain source
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* page, use it.
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*/
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cp2 = strdup(buf);
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if (cp2 == NULL)
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abort();
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}
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if (man == NULL) {
|
|
man = strdup(cp2);
|
|
} else {
|
|
olen = strlen(man);
|
|
nlen = strlen(cp2);
|
|
man = realloc(man,
|
|
olen + nlen + 2);
|
|
if (man == NULL)
|
|
abort();
|
|
strcat(man, " ");
|
|
strcat(man, cp2);
|
|
}
|
|
|
|
free(cp2);
|
|
|
|
if (!opt_a)
|
|
break;
|
|
}
|
|
pclose(p);
|
|
free(cp);
|
|
}
|
|
}
|
|
|
|
if (opt_s) {
|
|
/*
|
|
* Sources match if a subdir with the exact
|
|
* name is found.
|
|
*/
|
|
unusual = unusual | NO_SRC_FOUND;
|
|
for (dp = sourcedirs; *dp != NULL; dp++) {
|
|
cp = malloc(strlen(*dp) + 1 + s + 1);
|
|
if (cp == NULL)
|
|
abort();
|
|
strcpy(cp, *dp);
|
|
strcat(cp, "/");
|
|
strcat(cp, name);
|
|
if (stat(cp, &sb) == 0 &&
|
|
(sb.st_mode & S_IFMT) == S_IFDIR) {
|
|
unusual = unusual & ~NO_SRC_FOUND;
|
|
if (src == NULL) {
|
|
src = strdup(cp);
|
|
} else {
|
|
olen = strlen(src);
|
|
nlen = strlen(cp);
|
|
src = realloc(src,
|
|
olen + nlen + 2);
|
|
if (src == NULL)
|
|
abort();
|
|
strcat(src, " ");
|
|
strcat(src, cp);
|
|
}
|
|
if (!opt_a) {
|
|
free(cp);
|
|
break;
|
|
}
|
|
}
|
|
free(cp);
|
|
}
|
|
/*
|
|
* If still not found, ask locate to search it
|
|
* for us. This will find sources for things
|
|
* like lpr that are well hidden in the
|
|
* /usr/src tree, but takes a lot longer.
|
|
* Thus, option -x (`expensive') prevents this
|
|
* search.
|
|
*
|
|
* Do only match locate output that starts
|
|
* with one of our source directories, and at
|
|
* least one further level of subdirectories.
|
|
*/
|
|
if (opt_x || (src && !opt_a))
|
|
goto done_sources;
|
|
|
|
cp = malloc(sizeof LOCATECMD - 2 + s);
|
|
if (cp == NULL)
|
|
abort();
|
|
sprintf(cp, LOCATECMD, name);
|
|
if ((p = popen(cp, "r")) == NULL)
|
|
goto done_sources;
|
|
while ((src == NULL || opt_a) &&
|
|
(fgets(buf, BUFSIZ - 1, p)) != NULL) {
|
|
if ((cp2 = strchr(buf, '\n')) != NULL)
|
|
*cp2 = '\0';
|
|
for (dp = sourcedirs;
|
|
(src == NULL || opt_a) && *dp != NULL;
|
|
dp++) {
|
|
cp2 = malloc(strlen(*dp) + 9);
|
|
if (cp2 == NULL)
|
|
abort();
|
|
strcpy(cp2, "^");
|
|
strcat(cp2, *dp);
|
|
strcat(cp2, "/[^/]+/");
|
|
if ((i = regcomp(&re2, cp2,
|
|
REG_EXTENDED|REG_NOSUB))
|
|
!= 0) {
|
|
regerror(i, &re, buf,
|
|
BUFSIZ - 1);
|
|
errx(EX_UNAVAILABLE,
|
|
"regcomp(%s) failed: %s",
|
|
cp2, buf);
|
|
}
|
|
free(cp2);
|
|
if (regexec(&re2, buf, 0,
|
|
(regmatch_t *)NULL, 0)
|
|
== 0) {
|
|
unusual = unusual &
|
|
~NO_SRC_FOUND;
|
|
if (src == NULL) {
|
|
src = strdup(buf);
|
|
} else {
|
|
olen = strlen(src);
|
|
nlen = strlen(buf);
|
|
src = realloc(src,
|
|
olen +
|
|
nlen + 2);
|
|
if (src == NULL)
|
|
abort();
|
|
strcat(src, " ");
|
|
strcat(src, buf);
|
|
}
|
|
}
|
|
regfree(&re2);
|
|
}
|
|
}
|
|
pclose(p);
|
|
free(cp);
|
|
}
|
|
done_sources:
|
|
|
|
if (opt_u && !unusual)
|
|
continue;
|
|
|
|
printed = 0;
|
|
if (!opt_q) {
|
|
printf("%s:", name);
|
|
printed++;
|
|
}
|
|
if (bin) {
|
|
if (printed++)
|
|
putchar(' ');
|
|
fputs(bin, stdout);
|
|
}
|
|
if (man) {
|
|
if (printed++)
|
|
putchar(' ');
|
|
fputs(man, stdout);
|
|
}
|
|
if (src) {
|
|
if (printed++)
|
|
putchar(' ');
|
|
fputs(src, stdout);
|
|
}
|
|
if (printed)
|
|
putchar('\n');
|
|
}
|
|
|
|
if (opt_m)
|
|
regfree(&re);
|
|
|
|
return (0);
|
|
}
|