1 #include <sys/cdefs.h> 2 #include <lib.h> 3 #include "namespace.h" 4 5 #include <string.h> 6 7 #include <unistd.h> 8 9 /* 10 * "Smart" stub for now. This requires job control to be properly implemented. 11 */ 12 int setpgid(pid_t pid, pid_t pgid) 13 { 14 pid_t _pid, _pgid, cpid; 15 16 _pid = pid; 17 _pgid = pgid; 18 19 /* Who are we? */ 20 cpid = getpid(); 21 22 /* if zero, means current process. */ 23 if (_pid == 0) { 24 _pid = cpid; 25 } 26 27 /* if zero, means given pid. */ 28 if (_pgid == 0) { 29 _pgid = _pid; 30 } 31 32 /* right now we only support the equivalent of setsid(), which is 33 * setpgid(0,0) */ 34 if ((_pid != cpid) || (_pgid != cpid)) { 35 errno = EINVAL; 36 return -1; 37 } 38 39 if (setsid() == cpid) { 40 return 0; 41 } else { 42 return -1; 43 } 44 } 45