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Diffstat (limited to 'man3/strdup.3')
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diff --git a/man3/strdup.3 b/man3/strdup.3 new file mode 100644 index 000000000..b15db54f2 --- /dev/null +++ b/man3/strdup.3 @@ -0,0 +1,78 @@ +.\" Copyright 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 +.\" +.\" Since the Linux kernel and libraries are constantly changing, this +.\" manual page may be incorrect or out-of-date.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 Sun Jul 25 10:41:34 1993 by Rik Faith (faith@cs.unc.edu) +.\" Modified Wed Oct 17 01:12:26 2001 by John Levon <moz@compsoc.man.ac.uk> +.TH STRDUP 3 1993-04-12 "GNU" "Linux Programmer's Manual" +.SH NAME +strdup, strndup, strdupa, strndupa \- duplicate a string +.SH SYNOPSIS +.nf +.B #include <string.h> +.sp +.BI "char *strdup(const char *" s ); +.sp +.B #define _GNU_SOURCE +.br +.B #include <string.h> +.sp +.BI "char *strndup(const char *" s ", size_t " n ); +.br +.BI "char *strdupa(const char *" s ); +.br +.BI "char *strndupa(const char *" s ", size_t " n ); +.sp +.fi +.SH DESCRIPTION +The \fBstrdup()\fP function returns a pointer to a new string which +is a duplicate of the string \fIs\fP. Memory for the new string is +obtained with \fBmalloc\fP(3), and can be freed with \fBfree\fP(3). + +The \fBstrndup()\fP function is similar, but only copies at most +\fIn\fP characters. If \fIs\fP is longer than \fIn\fP, only \fIn\fP +characters are copied, and a terminating NUL is added. + +\fBstrdupa\fP and \fBstrndupa\fP are similar, but use \fBalloca(3)\fP +to allocate the buffer. They are only available when using the GNU +GCC suite, and suffer from the same limitations described in \fBalloca(3)\fP. + +.SH "RETURN VALUE" +The \fBstrdup()\fP function returns a pointer to the duplicated +string, or NULL if insufficient memory was available. +.SH ERRORS +.TP +.B ENOMEM +Insufficient memory available to allocate duplicate string. +.SH "CONFORMING TO" +.\" 4.3BSD-Reno, not (first) BSD 4.3. +SVID 3, BSD 4.3. +\fBstrndup()\fP, \fBstrdupa()\fP, and \fBstrndupa()\fP are GNU extensions. +.SH "SEE ALSO" +.BR alloca (3), +.BR calloc (3), +.BR free (3), +.BR malloc (3), +.BR realloc (3) |