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294 lines
8.0 KiB
294 lines
8.0 KiB
/*
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This file is part of the KDE libraries
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Copyright (c) 2000 Waldo Bastian <bastian@kde.org>
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public
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License version 2 as published by the Free Software Foundation.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public License
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along with this library; see the file COPYING.LIB. If not, write to
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the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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Boston, MA 02110-1301, USA.
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <sys/types.h>
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#include <sys/param.h>
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#include <sys/socket.h>
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#include <sys/stat.h>
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#include <sys/un.h>
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#include <errno.h>
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#include <string.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <pwd.h>
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#ifdef HAVE_LIMITS_H
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#include <limits.h>
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#endif
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int check_tmp_dir(const char *tmp_dir);
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int create_link(const char *file, const char *tmp_dir);
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int build_link(const char *tmp_prefix, const char *kde_prefix, int kdehostname);
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int check_tmp_dir(const char *tmp_dir)
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{
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int result;
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struct stat stat_buf;
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result = lstat(tmp_dir, &stat_buf);
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if ((result == -1) && (errno == ENOENT))
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{
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result = mkdir(tmp_dir, 0700);
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if (result == -1)
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{
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fprintf(stderr, "[lnusertemp] Error: Can not create directory \"%s\".\n", tmp_dir);
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return 1;
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}
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result = stat(tmp_dir, &stat_buf);
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}
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if ((result == -1) || (!S_ISDIR(stat_buf.st_mode)))
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{
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fprintf(stderr, "[lnusertemp] Error: \"%s\" is not a directory.\n", tmp_dir);
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return 1;
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}
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if (stat_buf.st_uid != getuid())
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{
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fprintf(stderr, "[lnusertemp] Error: \"%s\" is owned by uid %d instead of uid %d.\n", tmp_dir, stat_buf.st_uid, getuid());
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return 1;
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}
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return 0;
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}
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int create_link(const char *file, const char *tmp_dir)
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{
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int result;
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result = check_tmp_dir(tmp_dir);
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if (result)
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{
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return result;
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}
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result = symlink(tmp_dir, file);
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if (result == -1)
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{
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fprintf(stderr, "[lnusertemp] Error: Can not create link from \"%s\" to \"%s\"\n", file, tmp_dir);
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return 1;
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}
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/*printf("[lnusertemp] Created link from \"%s\" to \"%s\"\n", file, tmp_dir);*/
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return 0;
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}
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#ifndef PATH_MAX
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#define PATH_MAX 4096
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#endif
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int build_link(const char *tmp_prefix, const char *kde_prefix, int kdehostname)
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{
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struct passwd *pw_ent;
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char kde_tmp_dir[PATH_MAX+1];
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char user_tmp_dir[PATH_MAX+1];
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char tmp_buf[PATH_MAX+1];
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int uid = getuid();
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const char *home_dir = getenv("HOME");
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const char *kde_home = uid ? getenv("KDEHOME") : getenv("KDEROOTHOME");
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int result;
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struct stat stat_buf;
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kde_tmp_dir[0] = 0;
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pw_ent = getpwuid(uid);
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if (!pw_ent)
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{
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fprintf(stderr, "[lnusertemp] Error: Can not find password entry for uid %d.\n", getuid());
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return 1;
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}
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strncpy(user_tmp_dir, tmp_prefix, PATH_MAX);
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user_tmp_dir[ PATH_MAX ] = '\0';
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strncat(user_tmp_dir, pw_ent->pw_name, PATH_MAX - strlen(tmp_prefix));
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if (!kde_home || !kde_home[0])
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{
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kde_home = "~/.trinity/";
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}
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if (kde_home[0] == '~')
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{
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if (uid == 0)
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{
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home_dir = pw_ent->pw_dir ? pw_ent->pw_dir : "/root";
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}
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if (!home_dir || !home_dir[0])
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{
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fprintf(stderr, "[lnusertemp] Aborting. $HOME not set!\n");
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return 1;
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}
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if (strlen(home_dir) > (PATH_MAX-100))
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{
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fprintf(stderr, "[lnusertemp] Aborting. Home directory path too long!\n");
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return 1;
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}
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kde_home++;
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strncpy(kde_tmp_dir, home_dir, PATH_MAX);
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kde_tmp_dir[ PATH_MAX ] = '\0';
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}
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strncat(kde_tmp_dir, kde_home, PATH_MAX - strlen(kde_tmp_dir));
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/** Strip trailing '/' **/
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if ( kde_tmp_dir[strlen(kde_tmp_dir)-1] == '/')
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kde_tmp_dir[strlen(kde_tmp_dir)-1] = 0;
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result = stat(kde_tmp_dir, &stat_buf);
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if ((result == -1) && (errno == ENOENT))
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{
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result = mkdir(kde_tmp_dir, 0700);
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}
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if (result == -1)
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{
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perror("[lnusertemp] mkdir failed: ");
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return 1;
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}
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strncat(kde_tmp_dir, kde_prefix, PATH_MAX - strlen(kde_tmp_dir));
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if( kdehostname )
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{
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if( getenv("XAUTHLOCALHOSTNAME"))
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strncat(kde_tmp_dir+strlen(kde_tmp_dir), getenv("XAUTHLOCALHOSTNAME"), PATH_MAX - strlen(kde_tmp_dir) - 1);
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else
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return 0;
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}
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else
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{
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if (gethostname(kde_tmp_dir+strlen(kde_tmp_dir), PATH_MAX - strlen(kde_tmp_dir) - 1) != 0)
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{
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perror("[lnusertemp] Could not determine hostname: ");
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return 1;
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}
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}
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kde_tmp_dir[sizeof(kde_tmp_dir)-1] = '\0';
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result = lstat(kde_tmp_dir, &stat_buf);
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if ((result == 0) && (S_ISDIR(stat_buf.st_mode)))
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{
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/* $KDEHOME/tmp is a normal directory. Do nothing. */
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/*printf("[lnusertemp] Directory \"%s\" already exists.\n", kde_tmp_dir);*/
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return 0;
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}
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if ((result == -1) && (errno == ENOENT))
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{
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/*printf("[lnusertemp] Creating link %s.\n", kde_tmp_dir);*/
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result = create_link(kde_tmp_dir, user_tmp_dir);
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if (result == 0) return 0; /* Success */
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unlink(kde_tmp_dir);
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strncat(user_tmp_dir, "XXXXXX", PATH_MAX - strlen(user_tmp_dir));
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if (mkdtemp(user_tmp_dir) == NULL)
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return 1;
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return create_link(kde_tmp_dir, user_tmp_dir);
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}
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if ((result == -1) || (!S_ISLNK(stat_buf.st_mode)))
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{
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fprintf(stderr, "[lnusertemp] Error: \"%s\" is not a link or a directory.\n", kde_tmp_dir);
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return 1;
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}
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/* kde_tmp_dir is a link. Check whether it points to a valid directory. */
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result = readlink(kde_tmp_dir, tmp_buf, PATH_MAX);
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if (result == -1)
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{
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fprintf(stderr, "[lnusertemp] Error: \"%s\" could not be read.\n", kde_tmp_dir);
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return 1;
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}
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tmp_buf[result] = '\0';
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/*printf("[lnusertemp] Link \"%s\" points to \"%s\"\n", kde_tmp_dir, tmp_buf);*/
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if (strncmp(tmp_buf, user_tmp_dir, strlen(user_tmp_dir)) != 0)
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{
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fprintf(stderr, "[lnusertemp] Error: \"%s\" points to \"%s\" instead of \"%s\".\n", kde_tmp_dir, tmp_buf, user_tmp_dir);
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unlink(kde_tmp_dir);
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/*printf("[lnusertemp] Creating link %s.\n", kde_tmp_dir);*/
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result = create_link(kde_tmp_dir, user_tmp_dir);
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if (result == 0) return 0; /* Success */
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unlink(kde_tmp_dir);
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strncat(user_tmp_dir, "XXXXXX", PATH_MAX - strlen(user_tmp_dir));
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if (mkdtemp(user_tmp_dir) == NULL)
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return 1;
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return create_link(kde_tmp_dir, user_tmp_dir);
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}
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result = check_tmp_dir(tmp_buf);
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if (result == 0) return 0; /* Success */
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unlink(kde_tmp_dir);
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strncat(user_tmp_dir, "XXXXXX", PATH_MAX - strlen(user_tmp_dir));
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if (mkdtemp(user_tmp_dir) == NULL)
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return 1;
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return create_link(kde_tmp_dir, user_tmp_dir);
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}
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int main(int argc, char **argv)
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{
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const char *tmp = 0;
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char *tmp_prefix = 0;
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const char *kde_prefix = 0;
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int res = 0;
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if ((argc != 2) ||
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((strcmp(argv[1], "tmp")!=0) &&
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(strcmp(argv[1], "socket")!=0) &&
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(strcmp(argv[1], "cache")!=0)))
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{
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fprintf(stderr, "[lnusertemp] Usage: lnusertemp tmp|socket|cache\n");
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return 1;
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}
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tmp = getenv("KDETMP");
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if (!tmp || !tmp[0])
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tmp = getenv("TMPDIR");
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if (!tmp || !tmp[0])
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tmp = "/tmp";
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if (strcmp(argv[1], "tmp") == 0)
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{
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tmp_prefix = (char *)malloc(strlen(tmp)+strlen("/kde-")+1);
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strcpy(tmp_prefix, tmp);
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strcat(tmp_prefix, "/kde-");
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kde_prefix = "/tmp-";
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}
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else if (strcmp(argv[1], "socket") == 0)
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{
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tmp_prefix = (char *)malloc(strlen(tmp)+strlen("/ksocket-")+1);
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strcpy(tmp_prefix, tmp );
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strcat(tmp_prefix, "/ksocket-" );
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kde_prefix = "/socket-";
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}
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else if (strcmp(argv[1], "cache") == 0)
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{
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tmp = getenv("KDEVARTMP");
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if (!tmp || !tmp[0])
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tmp = "/var/tmp";
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tmp_prefix = (char *)malloc(strlen(tmp)+strlen("/kdecache-")+1);
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strcpy(tmp_prefix, tmp );
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strcat(tmp_prefix, "/kdecache-" );
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kde_prefix = "/cache-";
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}
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res = build_link(tmp_prefix, kde_prefix, 1);
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if( build_link(tmp_prefix, kde_prefix, 0))
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res = 1;
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free(tmp_prefix);
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return res;
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}
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