INTRO(3F)           UNIX Programmer's Manual            INTRO(3F)

NAME
     intro - introduction to FORTRAN library functions

DESCRIPTION
     This section describes those functions that are in the FOR-
     TRAN run time library.  The functions listed here provide an
     interface from _f_7_7 programs to the system in the same manner
     as the C library does for C programs.  They are automati-
     cally loaded as needed by the Fortran compiler _f_7_7(1).

     Most of these functions are in libU77.a. Some are in
     libF77.a or libI77.a.  A few intrinsic functions are
     described for the sake of completeness.

     For efficiency, the SCCS ID strings are not normally
     included in the _a._o_u_t file. To include them, simply declare

          external f77lid

     in any _f_7_7 module.

              _F_u_n_c_t_i_o_n_s _A_v_a_i_l_a_b_l_e _i_n _t_h_e _F_O_R_T_R_A_N _L_i_b_r_a_r_y

     abort                    terminate abruptly with memory image
     access                   determine accessability of a file
     alarm                    execute a subroutine after a specified time
     bessel functions         of two kinds for integer orders
     bit                      bitwise functions
         and                  bitwise and (see bit.3f)
         or                   bitwise or (see bit.3f)
         xor                  bitwise xor (see bit.3f)
         not                  bitwise not (see bit.3f)
         rshift               right shift (see bit.3f)
         lshift               left shift (see bit.3f)
     chdir                    change default directory
     chmod                    change file modes
     etime                    return elapsed execution time
         dtime                return elapsed execution time (see etime.3f)
     exit                     terminate process with status
     fdate                    return date and time in an ASCII string
     flmin                    return smallest real value
         flmax                return largest real value (see flmin.3f)
         ffrac                return smallest fractional value (see flmin.3f)
         dflmin               return smallest double value (see flmin.3f)
         dflmax               return largest double value (see flmin.3f)
         dffrac               return smallest fractional double (see flmin.3f)
         inmax                return largest integer value (see flmin.3f)
     flush                    flush output to a logical unit
     fork                     create a copy of this process
     fseek                    reposition a file on a logical unit
         ftell                tell file position on logical unit (see fseek.3f)

Printed 7/31/83                                                 1

INTRO(3F)           UNIX Programmer's Manual            INTRO(3F)

     getarg                   command arguments to fortran
         iargc                command arguments to fortran (see getarg.3f)
     getc                     get a character from a logical unit
         fgetc                get a character from a logical unit (see getc.3f)
     getcwd                   get pathname of current working directory
     getenv                   get value of environment variables
     getlog                   get user's login name
     getpid                   get process id
     getuid                   get user ID of the caller
         getgid               get group ID of the caller (see getuid.3f)
     hostnm                   get name of host system
     idate                    return date in numerical form
         itime                return time in numerical form (see idate.3f)
     index                    find substring in character object
         rindex               find substring in character object (see index.3f)
         lnblnk               find end of character object (see index.3f)
         len                  tell length of character object (see index.3f)
     ioinit                   initialize I/O system
     kill                     send a signal to a process
     link                     make a link to an existing file
         symlnk               create a symbolic link to a file (see link.3f)
     loc                      return the address of an object
     long                     convert to long integer
         short                convert to short integer (see long.3f)
     perror                   get system error messages
         gerror               get system error messages (see perror.3f)
         ierrno               get system error number (see perror.3f)
     putc                     write a character to a logical unit
         fputc                write a character to a logical unit (see putc.3f)
     qsort                    quick sort
     rand                     return random values
         drand                return random values (see rand.3f)
         irand                return random values (see rand.3f)
     signal                   change the action for a signal
     sleep                    sleep for awhile
     stat                     get file status
         fstat                get file status (see stat.3f)
         lstat                get file status (see stat.3f)
     system                   execute a unix command
     time                     return system time
         ctime                return system time (see time.3f)
         ltime                return system time (see time.3f)
         gmtime               return system time (see time.3f)
     topen                    open channel to magnetic tape device
         tclose               close tape channel (see topen.3f)
         tread                read tape device (see topen.3f)
         twrite               write tape device (see topen.3f)
         trewin               rewind tape device (see topen.3f)
         tskipf               skip forward on tape device (see topen.3f)
         tstate               get tape device status (see topen.3f)
     traper                   trap arithmetic errors
     trapov                   trap and repair floating point errors (obsolete)

Printed 7/31/83                                                 2

INTRO(3F)           UNIX Programmer's Manual            INTRO(3F)

     trpfpe                   trap and repair floating point errors
         fpecnt               how many faults have there been (see trpfpe.3f)
     ttynam                   find name of a terminal port
         isatty               is logical unit open to a tty port (see ttynam.3f)
     unlink                   remove a directory entry
     wait                     wait for a process to terminate

Printed 7/31/83                                                 3