diff options
Diffstat (limited to 'man3/strcpy.3')
| -rw-r--r-- | man3/strcpy.3 | 76 |
1 files changed, 76 insertions, 0 deletions
diff --git a/man3/strcpy.3 b/man3/strcpy.3 new file mode 100644 index 000000000..7e6a54438 --- /dev/null +++ b/man3/strcpy.3 @@ -0,0 +1,76 @@ +.\" Copyright (C) 1993 David Metcalfe (david@prism.demon.co.uk) +.\" +.\" Permission is granted to make and distribute verbatim copies of this +.\" manual provided the copyright notice and this permission notice are +.\" preserved on all copies. +.\" +.\" Permission is granted to copy and distribute modified versions of this +.\" manual under the conditions for verbatim copying, provided that the +.\" entire resulting derived work is distributed under the terms of a +.\" permission notice identical to this one. +.\" +.\" Since the Linux kernel and libraries are constantly changing, this +.\" manual page may be incorrect or out-of-date. The author(s) assume no +.\" responsibility for errors or omissions, or for damages resulting from +.\" the use of the information contained herein. The author(s) may not +.\" have taken the same level of care in the production of this manual, +.\" which is licensed free of charge, as they might when working +.\" professionally. +.\" +.\" Formatted or processed versions of this manual, if unaccompanied by +.\" the source, must acknowledge the copyright and authors of this work. +.\" +.\" References consulted: +.\" Linux libc source code +.\" Lewine's _POSIX Programmer's Guide_ (O'Reilly & Associates, 1991) +.\" 386BSD man pages +.\" Modified Sat Jul 24 18:06:49 1993 by Rik Faith (faith@cs.unc.edu) +.\" Modified Fri Aug 25 23:17:51 1995 by Andries Brouwer (aeb@cwi.nl) +.\" Modified Wed Dec 18 00:47:18 1996 by Andries Brouwer (aeb@cwi.nl) +.\" +.TH STRCPY 3 1993-04-11 "GNU" "Linux Programmer's Manual" +.SH NAME +strcpy, strncpy \- copy a string +.SH SYNOPSIS +.nf +.B #include <string.h> +.sp +.BI "char *strcpy(char *" dest ", const char *" src ); +.sp +.BI "char *strncpy(char *" dest ", const char *" src ", size_t " n ); +.fi +.SH DESCRIPTION +The \fBstrcpy()\fP function copies the string pointed to by \fIsrc\fP +(including the terminating `\\0' character) to the array pointed to by +\fIdest\fP. The strings may not overlap, and the destination string +\fIdest\fP must be large enough to receive the copy. +.PP +The \fBstrncpy()\fP function is similar, except that not more than +\fIn\fP bytes of \fIsrc\fP are copied. Thus, if there is no null byte +among the first \fIn\fP bytes of \fIsrc\fP, the result will not be +null-terminated. +.PP +In the case where the length of +.I src +is less than that of +.IR n , +the remainder of +.I dest +will be padded with nulls. +.SH "RETURN VALUE" +The \fBstrcpy()\fP and \fBstrncpy()\fP functions return a pointer to +the destination string \fIdest\fP. +.SH BUGS +If the destination string of a \fBstrcpy()\fP is not large enough +(that is, if the programmer was stupid/lazy, and failed to check +the size before copying) then anything might happen. +Overflowing fixed length strings is a favourite cracker technique. +.SH "CONFORMING TO" +SVID 3, POSIX, BSD 4.3, ISO 9899 +.SH "SEE ALSO" +.BR bcopy (3), +.BR memccpy (3), +.BR memcpy (3), +.BR memmove (3), +.BR wcscpy (3), +.BR wcsncpy (3) |