projects / thirdparty / man-pages.git / blame
| Commit | Line | Data |
|---|---|---|
| bf5a7247 | 1 | .\" Copyright (c) 1993 by Thomas Koenig (ig25@rz.uni-karlsruhe.de) |
| fea681da | 2 | .\" |
| 93015253 | 3 | .\" %%%LICENSE_START(VERBATIM) |
| fea681da MK |
4 | .\" Permission is granted to make and distribute verbatim copies of this |
| 5 | .\" manual provided the copyright notice and this permission notice are | |
| 6 | .\" preserved on all copies. | |
| 7 | .\" | |
| 8 | .\" Permission is granted to copy and distribute modified versions of this | |
| 9 | .\" manual under the conditions for verbatim copying, provided that the | |
| 10 | .\" entire resulting derived work is distributed under the terms of a | |
| 11 | .\" permission notice identical to this one. | |
| c13182ef | 12 | .\" |
| fea681da MK |
13 | .\" Since the Linux kernel and libraries are constantly changing, this |
| 14 | .\" manual page may be incorrect or out-of-date. The author(s) assume no | |
| 15 | .\" responsibility for errors or omissions, or for damages resulting from | |
| 16 | .\" the use of the information contained herein. The author(s) may not | |
| 17 | .\" have taken the same level of care in the production of this manual, | |
| 18 | .\" which is licensed free of charge, as they might when working | |
| 19 | .\" professionally. | |
| c13182ef | 20 | .\" |
| fea681da MK |
21 | .\" Formatted or processed versions of this manual, if unaccompanied by |
| 22 | .\" the source, must acknowledge the copyright and authors of this work. | |
| 4b72fb64 | 23 | .\" %%%LICENSE_END |
| c08df37a | 24 | .\" |
| fea681da | 25 | .\" Modified Sat Jul 24 18:16:02 1993 by Rik Faith (faith@cs.unc.edu) |
| 460495ca | 26 | .TH SLEEP 3 2015-08-08 "GNU" "Linux Programmer's Manual" |
| fea681da | 27 | .SH NAME |
| f68512e9 | 28 | sleep \- sleep for the specified number of seconds |
| fea681da MK |
29 | .SH SYNOPSIS |
| 30 | .nf | |
| 31 | .B #include <unistd.h> | |
| 32 | .sp | |
| 33 | .BI "unsigned int sleep(unsigned int " "seconds" ); | |
| 34 | .fi | |
| 35 | .SH DESCRIPTION | |
| 63aa9df0 | 36 | .BR sleep () |
| 1bfdc3cb | 37 | makes the calling thread sleep until |
| fea681da MK |
38 | .I seconds |
| 39 | seconds have elapsed or a signal arrives which is not ignored. | |
| 47297adb | 40 | .SH RETURN VALUE |
| cfd4a9a6 MK |
41 | Zero if the requested time has elapsed, |
| 42 | or the number of seconds left to sleep, | |
| 43 | if the call was interrupted by a signal handler. | |
| 7e548ead ZL |
44 | .SH ATTRIBUTES |
| 45 | For an explanation of the terms used in this section, see | |
| 46 | .BR attributes (7). | |
| 47 | .TS | |
| 48 | allbox; | |
| 49 | lb lb lbw27 | |
| 50 | l l l. | |
| 51 | Interface Attribute Value | |
| 52 | T{ | |
| 53 | .BR sleep () | |
| 54 | T} Thread safety MT-Unsafe sig:SIGCHLD/linux | |
| 55 | .TE | |
| 56 | ||
| 47297adb | 57 | .SH CONFORMING TO |
| a6db971b | 58 | POSIX.1-2001, POSIX.1-2008. |
| fea681da | 59 | .SH BUGS |
| 63aa9df0 | 60 | .BR sleep () |
| fea681da MK |
61 | may be implemented using |
| 62 | .BR SIGALRM ; | |
| 63 | mixing calls to | |
| bfbfd71d | 64 | .BR alarm (2) |
| fea681da | 65 | and |
| 63aa9df0 | 66 | .BR sleep () |
| fea681da MK |
67 | is a bad idea. |
| 68 | .PP | |
| 69 | Using | |
| fb186734 | 70 | .BR longjmp (3) |
| c13182ef | 71 | from a signal handler or modifying the handling of |
| fea681da MK |
72 | .B SIGALRM |
| 73 | while sleeping will cause undefined results. | |
| 47297adb | 74 | .SH SEE ALSO |
| fea681da | 75 | .BR alarm (2), |
| 87209bbe | 76 | .BR nanosleep (2), |
| cfd4a9a6 MK |
77 | .BR signal (2), |
| 78 | .BR signal (7) |