9f6915631b
Any of the setuid functions now updates /acct/uid/ with its own tid before changing users. This is so we can properly account for cpu time per uid. Change-Id: I34186cf4d5228cac8439e582a9e26c01ef3011e4 Signed-off-by: Mike Chan <mike@android.com>
60 lines
2.1 KiB
C
60 lines
2.1 KiB
C
/*
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* Copyright (C) 2010 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 <unistd.h>
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#include <stdio.h>
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#include <errno.h>
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#include <sys/stat.h>
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//#include <sys/types.h>
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int cpuacct_add(uid_t uid)
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{
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int count;
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FILE *fp;
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char buf[80];
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count = snprintf(buf, sizeof(buf), "/acct/uid/%d/tasks", uid);
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fp = fopen(buf, "w+");
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if (!fp) {
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/* Note: sizeof("tasks") returns 6, which includes the NULL char */
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buf[count - sizeof("tasks")] = 0;
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if (mkdir(buf, 0775) < 0)
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return -errno;
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/* Note: sizeof("tasks") returns 6, which includes the NULL char */
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buf[count - sizeof("tasks")] = '/';
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fp = fopen(buf, "w+");
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}
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if (!fp)
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return -errno;
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fprintf(fp, "0");
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if (fclose(fp))
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return -errno;
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return 0;
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}
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