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36 .\" @(#)sleep.3 8.1 (Berkeley) 6/4/93
47 .Fn nanosleep "const struct timespec *rqtp" "struct timespec *rmtp"
49 .Fd #include <signal.h>
52 .Fn signanosleep "const struct timespec *rqtp" "struct timespec *rmtp" "sigset_t *mask"
55 causes the process to sleep for the specified time. An unmasked signal will
56 cause it to terminate the sleep early, regardless of the
58 value on the interrupting signal.
62 function temporarily (and atomically) sets the signal mask of the process
63 for the duration of the system call so that specific signals can be
64 nominated to cause an early termination of the sleep.
68 function returns because the requested time has elapsed, the value
69 returned will be zero.
73 function returns due to the delivery of a signal, the value returned
74 will be the -1, and the global variable
76 will be set to indicate the interruption.
81 the timespec structure it references is updated to contain the
82 unslept amount (the request time minus the time actually slept).
84 If any of the following conditions occur, the
86 function shall return -1 and set
88 to the corresponding value.
95 points to memory that is not a valid part of the process
99 was interrupted by the delivery of a signal.
102 specified a nanosecond value less than zero
103 or greater than or equal to 1000 million.
106 is not supported by this implementation.
119 function is an extenstion that first appeared in