From b2cfc4e2e71d0f0a5113ddfbd93c8285cc4d74e4 Mon Sep 17 00:00:00 2001 From: rsc Date: Tue, 30 Sep 2003 17:47:41 +0000 Subject: Initial revision --- src/lib9/ffork-Linux.c | 39 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 39 insertions(+) create mode 100644 src/lib9/ffork-Linux.c (limited to 'src/lib9/ffork-Linux.c') diff --git a/src/lib9/ffork-Linux.c b/src/lib9/ffork-Linux.c new file mode 100644 index 00000000..aad80041 --- /dev/null +++ b/src/lib9/ffork-Linux.c @@ -0,0 +1,39 @@ +#include +#include +#include + +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; +} + -- cgit v1.2.3