155 lines
4.4 KiB
C
155 lines
4.4 KiB
C
/*
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* Copyright (c) 1996, 1997, 1998 Shigio Yamaguchi. All rights reserved.
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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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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Shigio Yamaguchi.
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* 4. Neither the name of the author nor the names of any co-contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR 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, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* getdbpath.c 20-Oct-97
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*
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*/
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#include <sys/param.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <unistd.h>
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#include <stdlib.h>
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#include <string.h>
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#include "die.h"
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#include "getdbpath.h"
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#include "test.h"
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static const char *makeobjdirprefix; /* obj partition */
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static const char *makeobjdir; /* obj directory */
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/*
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* gtagsexist: test whether GTAGS's existence.
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*
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* i) candidate candidate root directory
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* o) dbpath directory which GTAGS exist
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* r) 0: not found, 1: found
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*/
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int
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gtagsexist(candidate, dbpath)
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char *candidate;
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char *dbpath;
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{
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char path[MAXPATHLEN+1];
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sprintf(path, "%s/GTAGS", candidate);
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if (test("fr", path)) {
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strcpy(dbpath, candidate);
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return 1;
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}
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sprintf(path, "%s/%s/GTAGS", candidate, makeobjdir);
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if (test("fr", path)) {
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sprintf(dbpath, "%s/%s", candidate, makeobjdir);
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return 1;
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}
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sprintf(path, "%s%s/GTAGS", makeobjdirprefix, candidate);
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if (test("fr", path)) {
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sprintf(dbpath, "%s%s", makeobjdirprefix, candidate);
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return 1;
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}
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return 0;
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}
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/*
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* getdbpath: get dbpath directory
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*
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* o) cwd current directory
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* o) root root of source tree
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* o) dbpath directory which GTAGS exist
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*
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* root and dbpath assumed as
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* char cwd[MAXPATHLEN+1];
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* char root[MAXPATHLEN+1];
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* char dbpath[MAXPATHLEN+1];
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*/
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void
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getdbpath(cwd, root, dbpath)
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char *cwd;
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char *root;
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char *dbpath;
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{
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struct stat sb;
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char *p;
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if (!getcwd(cwd, MAXPATHLEN))
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die("cannot get current directory.");
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/*
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* GLOBAL never think '/' is the root of source tree.
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*/
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if (!strcmp(cwd, "/"))
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die("It's root directory! What are you doing?");
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if ((p = getenv("MAKEOBJDIRPREFIX")) != NULL)
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makeobjdirprefix = p;
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else
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makeobjdirprefix = "/usr/obj";
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if ((p = getenv("MAKEOBJDIR")) != NULL)
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makeobjdir = p;
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else
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makeobjdir = "obj";
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if ((p = getenv("GTAGSROOT")) != NULL) {
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if (*p != '/')
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die("GTAGSROOT must be an absolute path.");
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if (stat(p, &sb) || !S_ISDIR(sb.st_mode))
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die1("directory '%s' not found.", p);
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if (realpath(p, root) == NULL)
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die1("cannot get real path of '%s'.", p);
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/*
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* GTAGSDBPATH is meaningful only when GTAGSROOT exist.
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*/
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if ((p = getenv("GTAGSDBPATH")) != NULL) {
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if (*p != '/')
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die("GTAGSDBPATH must be an absolute path.");
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if (stat(p, &sb) || !S_ISDIR(sb.st_mode))
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die1("directory '%s' not found.", p);
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strcpy(dbpath, getenv("GTAGSDBPATH"));
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} else {
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if (!gtagsexist(root, dbpath))
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die("GTAGS not found.");
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}
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} else {
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/*
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* start from current directory to '/' directory.
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*/
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strcpy(root, cwd);
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p = root + strlen(root);
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while (!gtagsexist(root, dbpath)) {
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while (*--p != '/')
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;
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*p = 0;
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if (root == p) /* reached root directory */
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break;
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}
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if (*root == 0)
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die("GTAGS not found.");
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}
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}
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