diff options
Diffstat (limited to 'posix/unistd.h')
| -rw-r--r-- | posix/unistd.h | 26 |
1 files changed, 23 insertions, 3 deletions
diff --git a/posix/unistd.h b/posix/unistd.h index 516f288f64..2ac0b2f172 100644 --- a/posix/unistd.h +++ b/posix/unistd.h @@ -339,10 +339,30 @@ extern __pid_t __getpgid __P ((__pid_t __pid)); extern __pid_t getpgid __P ((__pid_t __pid)); #endif -#ifdef __USE_BSD -/* Another name for `setpgid'. */ +#if defined (__USE_SVID) || defined (__USE_BSD) +/* Both System V and BSD have `setpgrp' functions, but with different + calling conventions. The BSD function is the same as POSIX.1 `setpgid' + (above). The System V function takes no arguments and puts the calling + process in its on group like `setpgid (0, 0)'. + + New programs should always use `setpgid' instead. + + The default in GNU is to provide the System V function. The BSD + function is available under -D_BSD_SOURCE with -lbsd-compat. */ + +#ifndef __FAVOR_BSD + +/* Set the process group ID of the calling process to its own PID. + This is exactly the same as `setpgid (0, 0)'. */ +extern int setpgrp __P ((void)); + +#else + +/* Another name for `setpgid' (above). */ extern int setpgrp __P ((__pid_t __pid, __pid_t __pgrp)); -#endif /* Use BSD. */ + +#endif /* Favor BSD. */ +#endif /* Use SVID or BSD. */ /* Create a new session with the calling process as its leader. The process group IDs of the session and the calling process |