STRCPY(3)                  POSIX Programmer's Manual                 STRCPY(3)



PPRROOLLOOGG
       This manual page is part of the POSIX Programmer's Manual.  The OS
       implementation of this interface may differ (consult the corresponding
       OS manual page for details of OS behavior), or the interface may not be
       implemented on OS.

NNAAMMEE
       stpcpy, strcpy -- copy a string and return a pointer to the end of the
       result

SSYYNNOOPPSSIISS
       #include <string.h>

       char *stpcpy(char *restrict _s_1, const char *restrict _s_2);
       char *strcpy(char *restrict _s_1, const char *restrict _s_2);

DDEESSCCRRIIPPTTIIOONN
       For _s_t_r_c_p_y(): 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.1-2017 defers to the ISO C standard.

       The _s_t_p_c_p_y() and _s_t_r_c_p_y() functions shall copy the string pointed to by
       _s_2 (including the terminating NUL character) into the array pointed to
       by _s_1.

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

RREETTUURRNN VVAALLUUEE
       The _s_t_p_c_p_y() function shall return a pointer to the terminating NUL
       character copied into the _s_1 buffer.

       The _s_t_r_c_p_y() function shall return _s_1.

       No return values are reserved to indicate an error.

EERRRROORRSS
       No errors are defined.

       _T_h_e _f_o_l_l_o_w_i_n_g _s_e_c_t_i_o_n_s _a_r_e _i_n_f_o_r_m_a_t_i_v_e_.

EEXXAAMMPPLLEESS
   CCoonnssttrruuccttiioonn ooff aa MMuullttii--PPaarrtt MMeessssaaggee iinn aa SSiinnggllee BBuuffffeerr
           #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;
           }

   IInniittiiaalliizziinngg aa SSttrriinngg
       The following example copies the string ""--------------------"" into the
       _p_e_r_m_s_t_r_i_n_g variable.


           #include <string.h>
           ...
           static char permstring[11];
           ...
           strcpy(permstring, "----------");
           ...

   SSttoorriinngg aa KKeeyy aanndd DDaattaa
       The following example allocates space for a key using _m_a_l_l_o_c() then
       uses _s_t_r_c_p_y() to place the key there. Then it allocates space for data
       using _m_a_l_l_o_c(), and uses _s_t_r_c_p_y() to place data there. (The user-
       defined function _d_b_f_r_e_e() frees memory previously allocated to an array
       of type ssttrruucctt eelleemmeenntt **.)


           #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);
           ...

AAPPPPLLIICCAATTIIOONN UUSSAAGGEE
       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.

RRAATTIIOONNAALLEE
       None.

FFUUTTUURREE DDIIRREECCTTIIOONNSS
       None.

SSEEEE AALLSSOO
       _s_t_r_n_c_p_y(), _w_c_s_c_p_y()

       The Base Definitions volume of POSIX.1-2017, <<ssttrriinngg..hh>>

CCOOPPYYRRIIGGHHTT
       Portions of this text are reprinted and reproduced in electronic form
       from IEEE Std 1003.1-2017, Standard for Information Technology --
       Portable Operating System Interface (POSIX), The Open Group Base
       Specifications Issue 7, 2018 Edition, Copyright (C) 2018 by the
       Institute of Electrical and Electronics Engineers, Inc and The Open
       Group.  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.opengroup.org/unix/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                  2017                            STRCPY(3)
