projects / thirdparty / man-pages.git / blame
| Commit | Line | Data |
|---|---|---|
| a1eaacb1 | 1 | '\" t |
| fea681da MK |
2 | .\" Copyright 1993 David Metcalfe (david@prism.demon.co.uk) |
| 3 | .\" | |
| 5fbde956 | 4 | .\" SPDX-License-Identifier: Linux-man-pages-copyleft |
| fea681da MK |
5 | .\" |
| 6 | .\" References consulted: | |
| 7 | .\" Linux libc source code | |
| 8 | .\" Lewine's _POSIX Programmer's Guide_ (O'Reilly & Associates, 1991) | |
| 9 | .\" 386BSD man pages | |
| 10 | .\" Modified Sat Jul 24 19:48:17 1993 by Rik Faith (faith@cs.unc.edu) | |
| 4c1c5274 | 11 | .TH difftime 3 (date) "Linux man-pages (unreleased)" |
| fea681da MK |
12 | .SH NAME |
| 13 | difftime \- calculate time difference | |
| b813014f AC |
14 | .SH LIBRARY |
| 15 | Standard C library | |
| 16 | .RI ( libc ", " \-lc ) | |
| fea681da MK |
17 | .SH SYNOPSIS |
| 18 | .nf | |
| 19 | .B #include <time.h> | |
| c6d039a3 | 20 | .P |
| fea681da MK |
21 | .BI "double difftime(time_t " time1 ", time_t " time0 ); |
| 22 | .fi | |
| 23 | .SH DESCRIPTION | |
| 60a90ecd MK |
24 | The |
| 25 | .BR difftime () | |
| 26 | function returns the number of seconds elapsed | |
| 6d275e3c MK |
27 | between time \fItime1\fP and time \fItime0\fP, represented as a |
| 28 | .IR double . | |
| 7f652f51 PE |
29 | Each time is a count of seconds. |
| 30 | .P | |
| 31 | .I difftime(b,\~a) | |
| 32 | acts like | |
| 33 | .I (b\-a) | |
| 34 | except that the result does not overflow and is rounded to | |
| 35 | .IR double . | |
| 51f37626 | 36 | .SH ATTRIBUTES |
| 22c9b12c MK |
37 | For an explanation of the terms used in this section, see |
| 38 | .BR attributes (7). | |
| 39 | .TS | |
| 40 | allbox; | |
| c466875e | 41 | lbx lb lb |
| 22c9b12c MK |
42 | l l l. |
| 43 | Interface Attribute Value | |
| 44 | T{ | |
| 9e54434e BR |
45 | .na |
| 46 | .nh | |
| 51f37626 | 47 | .BR difftime () |
| 22c9b12c MK |
48 | T} Thread safety MT-Safe |
| 49 | .TE | |
| 3113c7f3 | 50 | .SH STANDARDS |
| 4131356c AC |
51 | C11, POSIX.1-2008. |
| 52 | .SH HISTORY | |
| 53 | POSIX.1-2001, C89, SVr4, 4.3BSD. | |
| 47297adb | 54 | .SH SEE ALSO |
| fea681da MK |
55 | .BR date (1), |
| 56 | .BR gettimeofday (2), | |
| 57 | .BR time (2), | |
| 58 | .BR ctime (3), | |
| 59 | .BR gmtime (3), | |
| 60 | .BR localtime (3) |