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/*
* Copyright (C) 2014, The Android Open Source Project
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * 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 COPYRIGHT HOLDERS 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
* COPYRIGHT OWNER 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.
*/
#include <grp.h>
#include <pwd.h>
#include <stdio.h>
#include <sys/types.h>
int uid_from_user(const char* name, uid_t* uid) {
struct passwd* pw = getpwnam(name);
if (pw == NULL) {
return -1;
}
*uid = pw->pw_uid;
return 0;
}
char* group_from_gid(gid_t gid, int noname) {
struct group* g = getgrgid(gid);
if (g == NULL) {
static char buf[32];
snprintf(buf, sizeof(buf), "%lu", (long) gid);
return noname ? NULL : buf;
}
return g->gr_name;
}
char* user_from_uid(uid_t uid, int noname) {
struct passwd* pw = getpwuid(uid);
if (pw == NULL) {
static char buf[32];
snprintf(buf, sizeof(buf), "%lu", (long) uid);
return noname ? NULL : buf;
}
return pw->pw_name;
}
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