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/*
* Copyright (c) 1996, 1997, 1998, 1999
* Shigio Yamaguchi. All rights reserved.
* Copyright (c) 1999
* Tama Communications Corporation. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Tama Communications
* Corporation and its contributors.
* 4. Neither the name of the author nor the names of any co-contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* getdbpath.c 19-Aug-99
*
*/
#include <sys/types.h>
#include <sys/stat.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "gparam.h"
#include "die.h"
#include "getdbpath.h"
#include "makepath.h"
#include "path.h"
#include "test.h"
static const char *makeobjdirprefix; /* obj partition */
static const char *makeobjdir; /* obj directory */
/*
* gtagsexist: test whether GTAGS's existence.
*
* i) candidate candidate root directory
* o) dbpath directory which GTAGS exist
* r) 0: not found, 1: found
*/
int
gtagsexist(candidate, dbpath)
char *candidate;
char *dbpath;
{
char path[MAXPATHLEN+1];
sprintf(path, "%s/GTAGS", candidate);
if (test("fr", path)) {
strcpy(dbpath, candidate);
return 1;
}
sprintf(path, "%s/%s/GTAGS", candidate, makeobjdir);
if (test("fr", path)) {
sprintf(dbpath, "%s/%s", candidate, makeobjdir);
return 1;
}
sprintf(path, "%s%s/GTAGS", makeobjdirprefix, candidate);
if (test("fr", path)) {
sprintf(dbpath, "%s%s", makeobjdirprefix, candidate);
return 1;
}
return 0;
}
/*
* getdbpath: get dbpath directory
*
* o) cwd current directory
* o) root root of source tree
* o) dbpath directory which GTAGS exist
*
* root and dbpath assumed as
* char cwd[MAXPATHLEN+1];
* char root[MAXPATHLEN+1];
* char dbpath[MAXPATHLEN+1];
*/
void
getdbpath(cwd, root, dbpath)
char *cwd;
char *root;
char *dbpath;
{
struct stat sb;
char *p;
if (!getcwd(cwd, MAXPATHLEN))
die("cannot get current directory.");
canonpath(cwd);
#ifndef _WIN32
/*
* GLOBAL never think '/' is the root of source tree.
*/
if (!strcmp(cwd, "/"))
die("It's root directory! What are you doing?");
#endif
if ((p = getenv("MAKEOBJDIRPREFIX")) != NULL)
makeobjdirprefix = p;
else
makeobjdirprefix = "/usr/obj";
if ((p = getenv("MAKEOBJDIR")) != NULL)
makeobjdir = p;
else
makeobjdir = "obj";
if ((p = getenv("GTAGSROOT")) != NULL) {
if (!isabspath(p))
die("GTAGSROOT must be an absolute path.");
if (stat(p, &sb) || !S_ISDIR(sb.st_mode))
die1("directory '%s' not found.", p);
if (realpath(p, root) == NULL)
die1("cannot get real path of '%s'.", p);
/*
* GTAGSDBPATH is meaningful only when GTAGSROOT exist.
*/
if ((p = getenv("GTAGSDBPATH")) != NULL) {
if (!isabspath(p))
die("GTAGSDBPATH must be an absolute path.");
if (stat(p, &sb) || !S_ISDIR(sb.st_mode))
die1("directory '%s' not found.", p);
strcpy(dbpath, getenv("GTAGSDBPATH"));
} else {
if (!gtagsexist(root, dbpath))
die("GTAGS not found.");
}
} else {
/*
* start from current directory to '/' directory.
*/
strcpy(root, cwd);
p = root + strlen(root);
while (!gtagsexist(root, dbpath)) {
while (*--p != '/' && p > root)
;
*p = 0;
if (root == p) /* reached root directory */
break;
}
if (*root == 0)
die("GTAGS not found.");
}
}
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