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45 lines
706 B
C
45 lines
706 B
C
#include <sched.h>
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#include <signal.h>
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#include <lib9.h>
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int fforkstacksize = 16384;
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int
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ffork(int flags, void (*fn)(void*), void *arg)
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{
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char *p;
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int cloneflag, pid;
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p = malloc(fforkstacksize);
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if(p == nil)
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return -1;
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cloneflag = 0;
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flags &= ~RFPROC;
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if(flags&RFMEM){
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cloneflag |= CLONE_VM;
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flags &= ~RFMEM;
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}
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if(!(flags&RFFDG))
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cloneflag |= CLONE_FILES;
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else
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flags &= ~RFFDG;
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if(!(flags&RFNOWAIT))
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cloneflag |= SIGCHLD;
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else
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flags &= ~RFNOWAIT;
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if(flags){
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fprint(2, "unknown rfork flags %x\n", flags);
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return -1;
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}
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pid = clone((int(*)(void*))fn, p+fforkstacksize-16, cloneflag, arg);
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if(pid < 0)
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free(p);
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return pid;
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}
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int
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getfforkid(void)
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{
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return getpid();
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}
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