fcntl(5) — sys5



FCNTL(5)        DOMAIN/IX Reference Manual (SYS5)        FCNTL(5)



NAME
     fcntl - file control options

USAGE
     #include <fcntl.h>

DESCRIPTION
     The fcntl(2) system call provides control over open files.
     The <fcntl.h> include file describes requests and arguments
     to fcntl(2) and to open(2).

     /* Flag values accessible to open(2) and fcntl(2) */
     /*  (The first three can only be set by open) */

     #define   O_RDONLY  0
     #define   O_WRONLY  1
     #define   O_RDWR    2
     #define   O_NDELAY  04   /* Non-blocking I/O */
     #define   O_APPEND  010  /* append (writes guaranteed at the end) */

     /* Flag values accessible only to open(2) */
     #define   O_CREAT   00400     /* open with file create (uses third open arg)*/
     #define   O_TRUNC   01000     /* open with truncation */
     #define   O_EXCL    02000     /* exclusive open */

     /* fcntl(2) requests */
     #define   F_DUPFD   0    /* Duplicate fildes */
     #define   F_GETFD   1    /* Get fildes flags */
     #define   F_SETFD   2    /* Set fildes flags */
     #define   F_GETFL   3    /* Get file flags */
     #define   F_SETFL   4    /* Set file flags */

RELATED INFORMATION
     fcntl(2), open(2).





















Printed 5/10/85                                           FCNTL-1
Museum
