1STRCPY(P)                  POSIX Programmer's Manual                 STRCPY(P)
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NAME

6       strcpy - copy a string
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SYNOPSIS

9       #include <string.h>
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11       char *strcpy(char *restrict s1, const char *restrict s2);
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13

DESCRIPTION

15       The strcpy() function shall copy the string pointed to by s2 (including
16       the terminating null byte) into the array pointed to by s1. If  copying
17       takes place between objects that overlap, the behavior is undefined.
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RETURN VALUE

20       The  strcpy()  function shall return s1; no return value is reserved to
21       indicate an error.
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ERRORS

24       No errors are defined.
25
26       The following sections are informative.
27

EXAMPLES

29   Initializing a String
30       The  following  example  copies  the  string  "----------"   into   the
31       permstring variable.
32
33
34              #include <string.h>
35              ...
36              static char permstring[11];
37              ...
38              strcpy(permstring, "----------");
39              ...
40
41   Storing a Key and Data
42       The  following  example  allocates  space for a key using malloc() then
43       uses strcpy() to place the key there. Then it allocates space for  data
44       using  malloc(),  and  uses  strcpy()  to place data there.  (The user-
45       defined function dbfree() frees memory previously allocated to an array
46       of type struct element *.)
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48
49              #include <string.h>
50              #include <stdlib.h>
51              #include <stdio.h>
52              ...
53              /* Structure used to read data and store it. */
54              struct element {
55                  char *key;
56                  char *data;
57              };
58
59
60              struct element *tbl, *curtbl;
61              char *key, *data;
62              int count;
63              ...
64              void dbfree(struct element *, int);
65              ...
66              if ((curtbl->key = malloc(strlen(key) + 1)) == NULL) {
67                  perror("malloc"); dbfree(tbl, count); return NULL;
68              }
69              strcpy(curtbl->key, key);
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71
72              if ((curtbl->data = malloc(strlen(data) + 1)) == NULL) {
73                  perror("malloc"); free(curtbl->key); dbfree(tbl, count); return NULL;
74              }
75              strcpy(curtbl->data, data);
76              ...
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APPLICATION USAGE

79       Character  movement  is  performed differently in different implementa‐
80       tions.  Thus, overlapping moves may yield surprises.
81
82       This issue is aligned with the ISO C standard;  this  does  not  affect
83       compatibility  with XPG3 applications. Reliable error detection by this
84       function was never guaranteed.
85

RATIONALE

87       None.
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FUTURE DIRECTIONS

90       None.
91

SEE ALSO

93       strncpy()  ,  the  Base  Definitions  volume  of  IEEE Std 1003.1-2001,
94       <string.h>
95

97       Portions  of  this text are reprinted and reproduced in electronic form
98       from IEEE Std 1003.1, 2003 Edition, Standard for Information Technology
99       --  Portable  Operating  System  Interface (POSIX), The Open Group Base
100       Specifications Issue 6, Copyright (C) 2001-2003  by  the  Institute  of
101       Electrical  and  Electronics  Engineers, Inc and The Open Group. In the
102       event of any discrepancy between this version and the original IEEE and
103       The  Open Group Standard, the original IEEE and The Open Group Standard
104       is the referee document. The original Standard can be  obtained  online
105       at http://www.opengroup.org/unix/online.html .
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109IEEE/The Open Group                  2003                            STRCPY(P)
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