1990/0227/port/devroot.c (diff list | history)

port/devroot.c on 1990/0227
1990/0227		#include "u.h" #include "lib.h" #include "mem.h" #include "dat.h" #include "fns.h" #include "errno.h" #include "devtab.h" enum{ Qdir, Qbin, Qboot, Qdev, Qenv, Qproc, }; Dirtab rootdir[]={ "bin", Qbin|CHDIR, 0, 0700, "boot", Qboot, 0, 0700, "dev", Qdev|CHDIR, 0, 0700, "env", Qenv|CHDIR, 0, 0700, "proc", Qproc|CHDIR, 0, 0700, }; #define NROOT (sizeof rootdir/sizeof(Dirtab)) void rootreset(void) { } void rootinit(void) { } Chan* rootattach(char *spec) { return devattach('/', spec); } Chan* rootclone(Chan *c, Chan *nc) { return devclone(c, nc); } int rootwalk(Chan *c, char *name) { return devwalk(c, name, rootdir, NROOT, devgen); } void rootstat(Chan *c, char *dp) { devstat(c, dp, rootdir, NROOT, devgen); } Chan* rootopen(Chan *c, int omode) { return devopen(c, omode, rootdir, NROOT, devgen); } void rootcreate(Chan *c, char *name, int omode, ulong perm) { error(0, Eperm); } /* * sysremove() knows this is a nop */ void rootclose(Chan *c) { } #include "boot.h" long rootread(Chan *c, void *buf, long n) { switch(c->qid & ~CHDIR){ case Qdir: return devdirread(c, buf, n, rootdir, NROOT, devgen); case Qboot: /* boot */ if(c->offset >= sizeof bootcode) return 0; if(c->offset+n > sizeof bootcode) n = sizeof bootcode - c->offset; memcpy(buf, ((char*)bootcode)+c->offset, n); return n; case Qdev: return 0; } error(0, Egreg); return 0; } long rootwrite(Chan *c, void *buf, long n) { error(0, Egreg); } void rootremove(Chan *c) { error(0, Eperm); } void rootwstat(Chan *c, char *dp) { error(0, Eperm); } void rootuserstr(Error *e, char *buf) { consuserstr(e, buf); } #include "errstr.h" void rooterrstr(Error *e, char *buf) { if(e->code<0 || e->code>=sizeof errstrtab/sizeof(char*)) strcpy(buf, "no such error"); else strcpy(buf, errstrtab[e->code]); }