62 lines
2.1 KiB
C
62 lines
2.1 KiB
C
/*
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* Copyright (C) 2014, The Android Open Source Project
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* 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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* * 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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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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* 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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#include <grp.h>
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#include <pwd.h>
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#include <stdio.h>
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#include <sys/types.h>
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int uid_from_user(const char* name, uid_t* uid) {
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struct passwd* pw = getpwnam(name);
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if (pw == NULL) {
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return -1;
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}
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*uid = pw->pw_uid;
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return 0;
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}
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char* group_from_gid(gid_t gid, int noname) {
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struct group* g = getgrgid(gid);
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if (g == NULL) {
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static char buf[32];
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snprintf(buf, sizeof(buf), "%lu", (long) gid);
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return noname ? NULL : buf;
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}
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return g->gr_name;
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}
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char* user_from_uid(uid_t uid, int noname) {
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struct passwd* pw = getpwuid(uid);
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if (pw == NULL) {
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static char buf[32];
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snprintf(buf, sizeof(buf), "%lu", (long) uid);
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return noname ? NULL : buf;
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}
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return pw->pw_name;
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}
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