1 /* This file is the counterpart of "read.c". It contains the code for writing 2 * insofar as this is not contained in read_write(). 3 * 4 * The entry points into this file are 5 * do_write: call read_write to perform the WRITE system call 6 */ 7 8 #include "fs.h" 9 #include "file.h" 10 #include <minix/callnr.h> 11 12 /*===========================================================================* 13 * do_write * 14 *===========================================================================*/ 15 int do_write(void) 16 { 17 /* Perform the write(fd, buffer, nbytes) system call. */ 18 19 /* See the comment in do_read(). */ 20 if (job_m_in.m_lc_vfs_readwrite.cum_io != 0) 21 return(EINVAL); 22 23 return(do_read_write_peek(WRITING, job_m_in.m_lc_vfs_readwrite.fd, 24 job_m_in.m_lc_vfs_readwrite.buf, job_m_in.m_lc_vfs_readwrite.len)); 25 } 26