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Annotation of coherent/a/usr/man/COHERENT/wait, revision 1.1.1.1

1.1       root        1: 
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                      3: wait()                 COHERENT System Call                wait()
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                      7: 
                      8: Await completion of a child process
                      9: 
                     10: wwaaiitt(_s_t_a_t_p)
                     11: iinntt *_s_t_a_t_p;
                     12: 
                     13: wait  suspends execution  of the invoking  process until  a child
                     14: process (created  with fork) terminates.  It  returns the process
                     15: identifier  of the  terminating child process.   If there  are no
                     16: children or if an interrupt occurs, it returns -1.
                     17: 
                     18: If it  is successful, wait returns the  process identifier of the
                     19: terminated child process.  In addition, wait fills in the integer
                     20: pointed to  by statp with exit-status  information about the com-
                     21: pleted process.  If  statp is NULL, wait discards the exit-status
                     22: information.
                     23: 
                     24: wait fills  in the low  byte of the  status-information word with
                     25: the termination status of the child process.  A child process may
                     26: have terminated because of a  signal, because of an exit call, or
                     27: have  stopped execution  during ptrace.   Termination  with exit,
                     28: which is  normal completion, gives status  0.  Other terminations
                     29: give signal  values as status (as defined in  the article on sig-
                     30: nal).  The 0200 bit of the status code indicates that a core dump
                     31: was produced.   A status  of 0177  indicates that the  process is
                     32: waiting for further action from ptrace.
                     33: 
                     34: The high byte of the returned status is the low byte of the argu-
                     35: ment to the exit system call.
                     36: 
                     37: If a  parent process does not remain in  existence long enough to
                     38: wait on a child process,  the child process is adopted by process
                     39: 1 (the initialization process).
                     40: 
                     41: ***** See Also *****
                     42: 
                     43: _exit(), COHERENT system calls, fork(), ptrace(), signal()
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                     64: COHERENT Lexicon                                           Page 1
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