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creat (3)
  • creat (2) ( Solaris man: Системные вызовы )
  • creat (2) ( FreeBSD man: Системные вызовы )
  • creat (2) ( Русские man: Системные вызовы )
  • creat (2) ( Linux man: Системные вызовы )
  • >> creat (3) ( POSIX man: Библиотечные вызовы )
  •  

    NAME

    creat - create a new file or rewrite an existing one
     
    

    SYNOPSIS

    #include <sys/stat.h>
    #include <fcntl.h>

    int creat(const char *path, mode_t mode);
     

    DESCRIPTION

    The function call:

    
    creat(path, mode)
    
    

    shall be equivalent to:

    
    open(path, O_WRONLY|O_CREAT|O_TRUNC, mode)
    
    
     

    RETURN VALUE

    Refer to open() .  

    ERRORS

    Refer to open() .

    The following sections are informative.  

    EXAMPLES

     

    Creating a File

    The following example creates the file /tmp/file with read and write permissions for the file owner and read permission for group and others. The resulting file descriptor is assigned to the fd variable.

    
    #include <fcntl.h>
    ...
    int fd;
    mode_t mode = S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH;
    char *filename = "/tmp/file";
    ...
    fd = creat(filename, mode);
    ...
    
    
     

    APPLICATION USAGE

    None.  

    RATIONALE

    The creat() function is redundant. Its services are also provided by the open() function. It has been included primarily for historical purposes since many existing applications depend on it. It is best considered a part of the C binding rather than a function that should be provided in other languages.  

    FUTURE DIRECTIONS

    None.  

    SEE ALSO

    open() , the Base Definitions volume of IEEE Std 1003.1-2001, <fcntl.h>, <sys/stat.h>, <sys/types.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
    Creating a File
    APPLICATION USAGE
    RATIONALE
    FUTURE DIRECTIONS
    SEE ALSO
    COPYRIGHT


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