read.c File Reference

#include <xinu.h>

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Functions
syscall	read (did32 descrp, char *buffer, uint32 count)

Function Documentation

read()

syscall read	(	did32	descrp,
		char *	buffer,
		uint32	count
	)

Definition at line 9 of file read.c.

References devtab, disable(), dentry::dvread, isbaddev, restore(), and SYSERR.

Referenced by lfdballoc(), lfibget(), lfibput(), lfsckfmt(), lfsetup(), lfsopen(), netin(), shell(), xsh_ls(), and xsh_rdstest().

{
    intmask     mask;       /* Saved interrupt mask     */
    struct dentry   *devptr;    /* Entry in device switch table */
    int32       retval;     /* Value to return to caller    */

    mask = disable();
    if (isbaddev(descrp)) {
        restore(mask);
        return SYSERR;
    }
    devptr = (struct dentry *) &devtab[descrp];
    retval = (*devptr->dvread) (devptr, buffer, count);
    restore(mask);
    return retval;
}

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