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30 .\" @(#)wait.1 8.1 (Berkeley) 6/5/93
37 .Nd await process completion
42 If invoked with no arguments, the
45 all existing child processes in the background
53 operand is specified, and it is the process ID of a
54 background child process that still exists, the
57 waits until that process has completed and consumes its
58 status information, without consuming the status information
61 If a pid operand is specified that is not the process ID of
62 a child background process that still exists,
65 without waiting for any processes to complete.
70 utility exits with one of the following values:
75 utility was invoked with no operands and
76 all of the existing background child processes have
77 terminated, or the process specified by the pid
78 operand exited normally with 0 as its exit status.
80 The specified process did not exist and its exit
81 status information was not available, or the specified
82 process existed or its exit status information
83 was available, and it terminated with a non-zero
87 If the specified process terminated abnormally due
88 to the receipt of a signal, the exit status
91 contains that termination status as
96 command is expected to be