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strcpy (3)
  • strcpy (3) ( FreeBSD man: Библиотечные вызовы )
  • strcpy (3) ( Русские man: Библиотечные вызовы )
  • strcpy (3) ( Linux man: Библиотечные вызовы )
  • >> strcpy (3) ( POSIX man: Библиотечные вызовы )
  • strcpy (9) ( Solaris man: Ядро )
  •  

    NAME

    strcpy - copy a string
     
    

    SYNOPSIS

    #include <string.h>

    char *strcpy(char *restrict s1, const char *restrict s2);
     

    DESCRIPTION

    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 IEEE Std 1003.1-2001 defers to the ISO C standard.

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

    RETURN VALUE

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

    ERRORS

    No errors are defined.

    The following sections are informative.  

    EXAMPLES

     

    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);
    ...
    
    
     

    APPLICATION USAGE

    Character movement is performed differently in different implementations. Thus, overlapping moves may yield surprises.

    This issue is aligned with the ISO C standard; this does not affect compatibility with XPG3 applications. Reliable error detection by this function was never guaranteed.  

    RATIONALE

    None.  

    FUTURE DIRECTIONS

    None.  

    SEE ALSO

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

    COPYRIGHT

    Portions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1, 2003 Edition, Standard for Information Technology -- Portable Operating System Interface (POSIX), The Open Group Base Specifications Issue 6, Copyright (C) 2001-2003 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 .


     

    Index

    NAME
    SYNOPSIS
    DESCRIPTION
    RETURN VALUE
    ERRORS
    EXAMPLES
    Initializing a String
    Storing a Key and Data
    APPLICATION USAGE
    RATIONALE
    FUTURE DIRECTIONS
    SEE ALSO
    COPYRIGHT


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