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authorJacob McDonnell <jacob@jacobmcdonnell.com>2026-04-26 16:38:00 -0400
committerJacob McDonnell <jacob@jacobmcdonnell.com>2026-04-26 16:38:00 -0400
commit97d5c458cfa039d857301e1ca7d5af3beb37131d (patch)
treeb460cd850d0537eb71806ba30358840377b27688 /static/v10/man2/wait.2
parentb89dc2331a50c63f8b33272a5c4c61ab98abdaa3 (diff)
build: Better Build System
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-.pa 1
-.he 'WAIT (II)'9/4/72'WAIT (II)'
-.ti 0
-NAME wait -- wait for process to die
-.sp
-.ti 0
-SYNOPSIS sys wait / wait = 7.
-.br
-(process ID in r0)
-.br
-(termination status/user status in r1)
-.sp
-.ti 0
-DESCRIPTION wait____
-causes its caller to delay until one of its child
-processes terminates.
-If any child has died since the last wait____, return is immediate;
-if there are no children, return is immediate with
-the error bit set.
-In the case of several children several wait____s are needed
-to learn of all the deaths.
-.sp
-If the error bit is not set on return,
-the r1 high byte contains the low byte of the
-child process r0 when it terminated.
-The r1 low byte contains the termination status
-of the process from the following list:
-.sp
- 0 exit
- 1 bus error
- 2 illegal instruction
- 3 trace trap
- 4 IOT trap
- 5 power fail trap
- 6 EMT trap
- 7 bad system call
- 8 PIR interrupt
- 9 floating point exception
- 10 memory violation
- 11 quit
- 12 interrupt
- 13 kill (see kill(II))
- 14 User I/O (not currently possible)
- +16 core image produced
-.sp
-.ti 0
-SEE ALSO exit(II), fork(II)
-.sp
-.ti 0
-DIAGNOSTICS error bit
-(c-bit) on if no children not previously waited for.
-.sp
-.ti 0
-BUGS A child
-which dies, but is never
-waited for consumes
-a slot in the process table.
-When this table is full,
-the system is effectively hung.