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https://github.com/topjohnwu/ndk-busybox.git
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67 lines
1.6 KiB
C
67 lines
1.6 KiB
C
/* vi: set sw=4 ts=4: */
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/*
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* Mini update implementation for busybox
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*
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*
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* Copyright (C) 1995, 1996 by Bruce Perens <bruce@pixar.com>.
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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 the GNU
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* 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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#include "internal.h"
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#include <linux/unistd.h>
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#if defined(__GLIBC__)
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#include <sys/kdaemon.h>
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#else
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_syscall2(int, bdflush, int, func, int, data);
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#endif /* __GLIBC__ */
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extern int update_main(int argc, char **argv)
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{
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/*
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* Update is actually two daemons, bdflush and update.
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*/
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int pid;
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pid = fork();
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if (pid < 0)
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return pid;
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else if (pid == 0) {
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/*
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* This is no longer necessary since 1.3.5x, but it will harmlessly
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* exit if that is the case.
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*/
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strcpy(argv[0], "bdflush (update)");
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argv[1] = 0;
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argv[2] = 0;
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bdflush(1, 0);
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_exit(0);
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}
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pid = fork();
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if (pid < 0)
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return pid;
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else if (pid == 0) {
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argv[0] = "update";
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for (;;) {
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sync();
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sleep(30);
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}
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}
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return 0;
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}
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