11/3/71 SYS OPEN (II)
NAME open -- open for reading or writing
SYNOPSIS sys open; name; mode / open = 5.
(descriptor in r0)
DESCRIPTION open opens the file name for reading (if mode is
0) or writing (if mode is non-zero). name is the
address of a string of ASCII characters repre-
senting a path name, terminated by a null charac-
ter.
The file descriptor should be saved for subse-
quent calls to read (or write) and close.
In both the read and write case the file pointer
is set to the beginning of the file.
If the last link to an open file is removed, the
file is not destroyed until it is closed.
FILES --
SEE ALSO creat, read, write, close
DIAGNOSTICS The error bit (c-bit) is set if the file does not
exist, if one of the necessary directories does
not exist or is unreadable, or if the file is not
readable.
BUGS --
OWNER ken, dmr