o5r/plan9port
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

Initial revision

Browse source
This commit is contained in:
rsc 2003-09-30 17:47:41 +00:00
parent 5f7d5e8d18
commit b2cfc4e2e7
242 changed files with 18177 additions and 0 deletions
Download patch file Download diff file Expand all files Collapse all files

39
src/lib9/ffork-Linux.c Normal file
View file

@ -0,0 +1,39 @@
#include <sched.h>
#include <signal.h>
#include <lib9.h>
int fforkstacksize = 16384;
int
ffork(int flags, void (*fn)(void*), void *arg)
{
char *p;
int cloneflag, pid;
p = malloc(fforkstacksize);
if(p == nil)
return -1;
cloneflag = 0;
flags &= ~RFPROC;
if(flags&RFMEM){
cloneflag |= CLONE_VM;
flags &= ~RFMEM;
}
if(!(flags&RFFDG))
cloneflag |= CLONE_FILES;
else
flags &= ~RFFDG;
if(!(flags&RFNOWAIT))
cloneflag |= SIGCHLD;
else
flags &= ~RFNOWAIT;
if(flags){
fprint(2, "unknown rfork flags %x\n", flags);
return -1;
}
pid = clone((int(*)(void*))fn, p+fforkstacksize-16, cloneflag, arg);
if(pid < 0)
free(p);
return pid;
}