projects / unix-history / blame
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1 | .\" Copyright (c) 1990 The Regents of the University of California. |
| 2 | .\" All rights reserved. | |
| 3 | .\" | |
| 4 | .\" This code is derived from software contributed to Berkeley by | |
| 5 | .\" Chris Torek. | |
| 6 | .\" | |
| 7 | .\" %sccs.include.redist.man% | |
| 8 | .\" | |
| 9 | .\" @(#)strncpy.3 5.1 (Berkeley) %G% | |
| 10 | .\" | |
| 11 | .TH STRNCPY 3 "" | |
| 12 | .UC 4 | |
| 13 | .SH NAME | |
| 14 | strncpy \- copy strings of limited length | |
| 15 | .SH SYNOPSIS | |
| 16 | .nf | |
| 17 | .ft B | |
| 18 | #include <string.h> | |
| 19 | ||
| 20 | char * | |
| 21 | strncpy(char *dst, const char *src, size_t len); | |
| 22 | .ft R | |
| 23 | .fi | |
| 24 | .SH DESCRIPTION | |
| 25 | .B Strncpy | |
| 26 | writes exactly | |
| 27 | .I len | |
| 28 | characters into | |
| 29 | .I dst | |
| 30 | by copying string | |
| 31 | .I src | |
| 32 | to | |
| 33 | .IR dst , | |
| 34 | appending '\e0' characters if | |
| 35 | .I src | |
| 36 | is less than | |
| 37 | .I len | |
| 38 | characters long, and | |
| 39 | .I not | |
| 40 | terminating | |
| 41 | .I dst | |
| 42 | if | |
| 43 | .I src | |
| 44 | is more than | |
| 45 | .I len | |
| 46 | characters long. | |
| 47 | .B Strncpy | |
| 48 | returns | |
| 49 | .IR dst . | |
| 50 | .SH EXAMPLES | |
| 51 | The following sets ``chararray'' to ``abc\e0\e0\e0'': | |
| 52 | .sp | |
| 53 | .ti +0.5i | |
| 54 | (void)strncpy(chararray, "abc", 6). | |
| 55 | .PP | |
| 56 | The following sets ``chararray'' to ``abcdef'': | |
| 57 | .sp | |
| 58 | .RS | |
| 59 | (void)strncpy(chararray, "abcdefgh", 6); | |
| 60 | .RE | |
| 61 | .SH SEE ALSO | |
| 62 | bcopy(3), memccpy(3), memcpy(3), memmove(3), strcpy(3) | |
| 63 | .SH STANDARDS | |
| 64 | .B Strncpy | |
| 65 | conforms to ANSI X3.159-1989 (``ANSI C''). |