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PROLOG | NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | ERRORS | EXAMPLES | APPLICATION USAGE | RATIONALE | FUTURE DIRECTIONS | SEE ALSO | COPYRIGHT |
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STRCPY(3P) POSIX Programmer's Manual STRCPY(3P)
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.
stpcpy, strcpy — copy a string and return a pointer to the end of the
result
#include <string.h>
char *stpcpy(char *restrict s1, const char *restrict s2);
char *strcpy(char *restrict s1, const char *restrict s2);
For strcpy(): 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.1‐2008 defers to the ISO C standard.
The stpcpy() and strcpy() functions shall copy the string pointed to
by s2 (including the terminating NUL character) into the array
pointed to by s1.
If copying takes place between objects that overlap, the behavior is
undefined.
The stpcpy() function shall return a pointer to the terminating NUL
character copied into the s1 buffer.
The strcpy() function shall return s1.
No return values are reserved to indicate an error.
No errors are defined.
The following sections are informative.
Construction of a Multi-Part Message in a Single Buffer
#include <string.h>
#include <stdio.h>
int
main (void)
{
char buffer [10];
char *name = buffer;
name = stpcpy (stpcpy (stpcpy (name, "ice"),"-"), "cream");
puts (buffer);
return 0;
}
Initializing a String
The following example copies the string "----------" into the
permstring variable.
#include <string.h>
...
static char permstring[11];
...
strcpy(permstring, "----------");
...
Storing a Key and Data
The following example allocates space for a key using malloc() then
uses strcpy() to place the key there. Then it allocates space for
data using malloc(), and uses strcpy() to place data there. (The
user-defined function dbfree() frees memory previously allocated to
an array of type struct element *.)
#include <string.h>
#include <stdlib.h>
#include <stdio.h>
...
/* Structure used to read data and store it. */
struct element {
char *key;
char *data;
};
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);
if ((curtbl->data = malloc(strlen(data) + 1)) == NULL) {
perror("malloc"); free(curtbl->key); dbfree(tbl, count); return NULL;
}
strcpy(curtbl->data, data);
...
Character movement is performed differently in different
implementations. Thus, overlapping moves may yield surprises.
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.
None.
None.
strncpy(3p), wcscpy(3p)
The Base Definitions volume of POSIX.1‐2008, string.h(0p)
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 .
IEEE/The Open Group 2013 STRCPY(3P)
Pages that refer to this page: string.h(0p), localeconv(3p), stpcpy(3p), strncpy(3p), wcscpy(3p)
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