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28 .\" @(#)setpgid.2 8.1 (Berkeley) 6/4/93
43 .Fn setpgid "pid_t pid" "pid_t pgrp"
45 .Fn setpgrp "pid_t pid" "pid_t pgrp"
50 sets the process group of the specified process
56 is zero, then the call applies to the current process.
59 is zero, then the process id of the process specified by
63 If the affected process is not the invoking process, then it must be a
64 child of the invoking process, it must not have performed an
66 operation, and both processes must be in the same session.
67 The requested process group ID must already exist in the session of
68 the caller, or it must be equal to the target process ID.
77 and is retained for calling convention compatibility with historical
84 will fail and the process group will not be altered if:
87 The requested process group ID is not legal.
89 The requested process does not exist.
91 The target process is not the calling process or
92 a child of the calling process.
94 The requested process is a child of the calling process,
95 but it has performed an
99 The target process is a session leader.
101 The requested process group ID is not in the session of the caller,
102 and it is not equal to the process ID of the target process.
109 system call is expected to conform to