114 lines
2.8 KiB
C
114 lines
2.8 KiB
C
/*
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*
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* Copyright (c) International Business Machines Corp., 2001
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program 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
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* the GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/*
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* NAME
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* hugetlb.c
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*
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* DESCRIPTION
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* common routines for the hugepage tests.
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*
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* The library contains the following routines:
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*
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* getipckey()
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* getuserid()
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* rm_shm()
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*/
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#define TST_NO_DEFAULT_MAIN
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#include <sys/types.h>
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#include <sys/ipc.h>
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#include <sys/shm.h>
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#include <sys/time.h>
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#include <pwd.h>
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#include "hugetlb.h"
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key_t shmkey;
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/*
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* getipckey() - generates and returns a message key used by the "get"
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* calls to create an IPC resource.
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*/
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int getipckey(void)
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{
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const char a = 'a';
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int ascii_a = (int)a;
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char *curdir = NULL;
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size_t size = 0;
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key_t ipc_key;
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struct timeval time_info;
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curdir = getcwd(curdir, size);
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if (curdir == NULL)
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tst_brk(TBROK | TERRNO, "getcwd(curdir)");
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/*
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* Get a Sys V IPC key
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*
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* ftok() requires a character as a second argument. This is
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* refered to as a "project identifier" in the man page. In
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* order to maximize the chance of getting a unique key, the
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* project identifier is a "random character" produced by
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* generating a random number between 0 and 25 and then adding
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* that to the ascii value of 'a'. The "seed" for the random
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* number is the microseconds value that is set in the timeval
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* structure after calling gettimeofday().
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*/
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gettimeofday(&time_info, NULL);
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srandom((unsigned int)time_info.tv_usec);
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ipc_key = ftok(curdir, ascii_a + random() % 26);
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if (ipc_key == -1)
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tst_brk(TBROK | TERRNO, __func__);
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return ipc_key;
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}
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/*
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* getuserid() - return the integer value for the "user" id
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*/
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int getuserid(char *user)
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{
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struct passwd *ent;
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ent = getpwnam(user);
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if (ent == NULL)
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tst_brk(TBROK | TERRNO, "getpwnam");
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return ent->pw_uid;
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}
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/*
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* rm_shm() - removes a shared memory segment.
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*/
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void rm_shm(int shm_id)
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{
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if (shm_id == -1)
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return;
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/*
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* check for # of attaches ?
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*/
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if (shmctl(shm_id, IPC_RMID, NULL) == -1) {
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tst_res(TINFO, "WARNING: shared memory deletion failed.");
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tst_res(TINFO, "This could lead to IPC resource problems.");
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tst_res(TINFO, "id = %d", shm_id);
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}
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}
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