github.com/afumu/libc@v0.0.6/musl/src/unistd/setgid.c (about)

     1  #include <unistd.h>
     2  #include "syscall.h"
     3  #include "libc.h"
     4  
     5  int setgid(gid_t gid)
     6  {
     7  	return __setxid(SYS_setgid, gid, 0, 0);
     8  }