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pwgr.c
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t_groups.sh
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t_id.sh
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t_whoami.sh
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Editing: pwgr.c
/* $NetBSD: pwgr.c,v 1.1 2012/03/17 16:33:14 jruoho Exp $ */ /* * Copyright (c) 2007 The NetBSD Foundation, Inc. * 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. * * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. 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 FOUNDATION 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. */ /* * This file implements replacements for all user/group-related functions * called by id(1). It provides fake but deterministic user and group * information. The details are as such: * User root, uid 0, primary group 0 (wheel). * User test, uid 100, primary group 100 (users), secondary group 0 (wheel). */ #include <sys/types.h> #include <errno.h> #include <grp.h> #include <pwd.h> #include <stdlib.h> #include <unistd.h> #include <string.h> char Login[16]; struct group GrEntry; struct passwd PwEntry; gid_t getgid(void) { return 100; } gid_t getegid(void) { if (getenv("LIBFAKE_EGID_ROOT") != NULL) return 0; else return 100; } uid_t getuid(void) { return 100; } uid_t geteuid(void) { if (getenv("LIBFAKE_EUID_ROOT") != NULL) return 0; else return 100; } char * getlogin(void) { strcpy(Login, "test"); return Login; } struct group * getgrgid(gid_t gid) { struct group *g = &GrEntry; memset(g, 0, sizeof(*g)); if (gid == 0) { g->gr_name = __UNCONST("wheel"); g->gr_gid = 0; } else if (gid == 100) { g->gr_name = __UNCONST("users"); g->gr_gid = 100; } else g = NULL; return g; } int getgrouplist(const char *name, gid_t basegid, gid_t *groups, int *ngroups) { int cnt, ret; if (strcmp(name, "root") == 0) { if (*ngroups >= 1) { groups[0] = basegid; cnt = 1; } ret = (*ngroups >= cnt) ? 0 : -1; *ngroups = cnt; } else if (strcmp(name, "test") == 0) { if (*ngroups >= 1) { groups[0] = basegid; cnt = 1; } if (*ngroups >= 2) { groups[1] = 0; cnt = 2; } ret = (*ngroups >= cnt) ? 0 : -1; *ngroups = cnt; } else ret = -1; return ret; } int getgroups(int gidsetlen, gid_t *gidset) { if (gidsetlen < 2) { errno = EINVAL; return -1; } gidset[0] = 100; gidset[1] = 0; return 2; } struct passwd * getpwnam(const char *login) { struct passwd *p = &PwEntry; memset(p, 0, sizeof(*p)); if (strcmp(login, "root") == 0) { p->pw_name = __UNCONST("root"); p->pw_uid = 0; p->pw_gid = 0; } else if (strcmp(login, "test") == 0) { p->pw_name = __UNCONST("test"); p->pw_uid = 100; p->pw_gid = 100; } else p = NULL; return p; } struct passwd * getpwuid(uid_t uid) { struct passwd *p = &PwEntry; memset(p, 0, sizeof(*p)); if (uid == 0) { p->pw_name = __UNCONST("root"); p->pw_uid = 0; p->pw_gid = 0; } else if (uid == 100) { p->pw_name = __UNCONST("test"); p->pw_uid = 100; p->pw_gid = 100; } else p = NULL; return p; }
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