WRITE(2) WRITE(2)
NAME
write - write on a file
SYNOPSIS
write(fildes, buffer, nbytes)
char *buffer;
DESCRIPTION
A file descriptor is a word returned from a successful open,
creat, dup, or pipe(2) call.
Buffer is the address of nbytes contiguous bytes which are
written on the output file. The number of characters actu-
ally written is returned. It should be regarded as an error
if this is not the same as requested.
Writes which are multiples of 512 characters long and begin
on a 512-byte boundary in the file are more efficient than
any others.
SEE ALSO
creat(2), open(2), pipe(2)
DIAGNOSTICS
Returns -1 on error: bad descriptor, buffer address, or
count; physical I/O errors.
ASSEMBLER
(write = 4.)
(file descriptor in r0)
sys write; buffer; nbytes
(byte count in r0)