'\" et

.TH STRCPY "3P" 2013 "IEEE/The Open Group" "POSIX Programmer's Manual"

.SH PROLOG

This manual page is part of the POSIX Programmer's Manual.

The Linux implementation of this interface may differ (consult

the corresponding Linux manual page for details of Linux behavior),

or the interface may not be implemented on Linux.

.SH NAME

stpcpy, strcpy

\(em copy a string and return a pointer to the end of the result

.SH SYNOPSIS

.LP

.nf

#include <string.h>

.P

char *stpcpy(char *restrict \fIs1\fP, const char *restrict \fIs2\fP);

char *strcpy(char *restrict \fIs1\fP, const char *restrict \fIs2\fP);

.fi

.SH DESCRIPTION

For

\fIstrcpy\fR():

The functionality described on this reference page is aligned with the

ISO\ C standard. Any conflict between the requirements described here and the

ISO\ C standard is unintentional. This volume of POSIX.1\(hy2008 defers to the ISO\ C standard.

.P

The

\fIstpcpy\fR()

and

\fIstrcpy\fR()

functions shall copy the string pointed to by

.IR s2

(including the terminating NUL character) into the array pointed to by

.IR s1 .

.P

If copying takes place between objects that overlap, the behavior is

undefined.

.SH "RETURN VALUE"

The

\fIstpcpy\fR()

function shall return a pointer to the terminating NUL character copied

into the

.IR s1

buffer.

.P

The

\fIstrcpy\fR()

function shall return

.IR s1 .

.P

No return values are reserved to indicate an error.

.SH ERRORS

No errors are defined.

.LP

.IR "The following sections are informative."

.SH EXAMPLES

.SS "Construction of a Multi-Part Message in a Single Buffer"

.sp

.RS 4

.nf

\fB

#include <string.h>

#include <stdio.h>

.P

int

main (void)

{

    char buffer [10];

    char *name = buffer;

.P

    name = stpcpy (stpcpy (stpcpy (name, "ice"),"-"), "cream");

    puts (buffer);

    return 0;

}

.fi \fR

.P

.RE

.SS "Initializing a String"

.P

The following example copies the string

.BR \(dq----------\(dq 

into the

.IR permstring

variable.

.sp

.RS 4

.nf

\fB

#include <string.h>

\&...

static char permstring[11];

\&...

strcpy(permstring, "----------");

\&...

.fi \fR

.P

.RE

.SS "Storing a Key and Data"

.P

The following example allocates space for a key using

\fImalloc\fR()

then uses

\fIstrcpy\fR()

to place the key there. Then it allocates space for data using

\fImalloc\fR(),

and uses

\fIstrcpy\fR()

to place data there. (The user-defined function

\fIdbfree\fR()

frees memory previously allocated to an array of type

.BR "struct element *" .)

.sp

.RS 4

.nf

\fB

#include <string.h>

#include <stdlib.h>

#include <stdio.h>

\&...

/* Structure used to read data and store it. */

struct element {

    char *key;

    char *data;

};

.P

struct element *tbl, *curtbl;

char *key, *data;

int count;

\&...

void dbfree(struct element *, int);

\&...

if ((curtbl->key = malloc(strlen(key) + 1)) == NULL) {

    perror("malloc"); dbfree(tbl, count); return NULL;

}

strcpy(curtbl->key, key);

.P

if ((curtbl->data = malloc(strlen(data) + 1)) == NULL) {

    perror("malloc"); free(curtbl->key); dbfree(tbl, count); return NULL;

}

strcpy(curtbl->data, data);

\&...

.fi \fR

.P

.RE

.SH "APPLICATION USAGE"

Character movement is performed differently in different

implementations. Thus, overlapping moves may yield surprises.

.P

This version is aligned with the ISO\ C standard; this does not affect

compatibility with XPG3 applications. Reliable error detection by this

function was never guaranteed.

.SH RATIONALE

None.

.SH "FUTURE DIRECTIONS"

None.

.SH "SEE ALSO"

.IR "\fIstrncpy\fR\^(\|)",

.IR "\fIwcscpy\fR\^(\|)"

.P

The Base Definitions volume of POSIX.1\(hy2008,

.IR "\fB<string.h>\fP"

.SH COPYRIGHT

Portions of this text are reprinted and reproduced in electronic form

from IEEE Std 1003.1, 2013 Edition, Standard for Information Technology

-- Portable Operating System Interface (POSIX), The Open Group Base

Specifications Issue 7, Copyright (C) 2013 by the Institute of

Electrical and Electronics Engineers, Inc and The Open Group.

(This is POSIX.1-2008 with the 2013 Technical Corrigendum 1 applied.) In the

event of any discrepancy between this version and the original IEEE and

The Open Group Standard, the original IEEE and The Open Group Standard

is the referee document. The original Standard can be obtained online at

http://www.unix.org/online.html .

Any typographical or formatting errors that appear

in this page are most likely

to have been introduced during the conversion of the source files to

man page format. To report such errors, see

https://www.kernel.org/doc/man-pages/reporting_bugs.html .