1993/0724/port/devroot.c (diff list | history)

1993/0501/sys/src/9/port/devroot.c:6,14 – 1993/0724/sys/src/9/port/devroot.c:6,13 (short | long | prev | next)
1992/0111		#include "../port/error.h"
1990/0227		#include "devtab.h"
1993/0501		enum {
1990/0227		Qdir,
1993/0724		enum{ Qdir= 0,
1990/0227		Qbin, Qdev, Qenv,
1993/0501/sys/src/9/port/devroot.c:15,50 – 1993/0724/sys/src/9/port/devroot.c:14,39
1990/0227		Qproc,
1992/0213		Qnet,
1993/0501		Qrecover,
1993/0724		Qboot, /* readable files */
1991/1206		Qboot, Qcfs,
1992/0902		Qfs,
1993/0724		Nfiles=13, /* max root files */
1990/0227		};
1991/0214		extern long cfslen;
1991/0216		extern ulong cfscode[];
1992/0902		extern long fslen; extern ulong fscode[];
1991/1206		extern ulong bootlen;
1992/0902		extern uchar bootcode[];
1991/0214
1990/0227		Dirtab rootdir[]={
1991/1112		"bin", {Qbin|CHDIR}, 0, 0777, "boot", {Qboot}, 0, 0777, "dev", {Qdev|CHDIR}, 0, 0777, "env", {Qenv|CHDIR}, 0, 0777, "proc", {Qproc|CHDIR}, 0, 0777,
1992/0213		"net", {Qnet|CHDIR}, 0, 0777,
1993/0501		"recover", {Qrecover}, 0, 0777,
1993/0724		Dirtab rootdir[Nfiles]={ "bin", {Qbin|CHDIR}, 0, 0777, "dev", {Qdev|CHDIR}, 0, 0777, "env", {Qenv|CHDIR}, 0, 0777, "proc", {Qproc|CHDIR}, 0, 0777, "net", {Qnet|CHDIR}, 0, 0777, "recover", {Qrecover}, 0, 0777,
1990/0227		}; #define NROOT (sizeof rootdir/sizeof(Dirtab))
1991/0615		Dirtab rootpdir[]={
1991/1112		"cfs", {Qcfs}, 0, 0777,
1992/0902		"fs", {Qfs}, 0, 0777,
1991/0615		}; Dirtab *rootmap[sizeof rootpdir/sizeof(Dirtab)];
1991/0214		int nroot;
1990/0227
1993/0724		static uchar *rootdata[Nfiles]; static int nroot = Qboot - 1;
1993/0501		typedef struct Recover Recover; struct Recover {
1993/0501/sys/src/9/port/devroot.c:61,94 – 1993/0724/sys/src/9/port/devroot.c:50,79
1993/0501		Recover *q; }reclist;
1991/0615		int rootgen(Chan *c, Dirtab *tab, int ntab, int i, Dir *dp)
1993/0724		/* * add a root file */ void addrootfile(char *name, uchar *contents, ulong len)
1991/0615		{
1992/0711		USED(ntab);
1993/0724		Dirtab *d;
1992/0711
1992/0225		if(i >= nroot)
1991/0615		return -1;
1992/0225
1991/0615		if(i < NROOT)
1992/0225		tab = &rootdir[i];
1991/0615		else tab = rootmap[i - NROOT];
1992/0225
1991/1109		devdir(c, tab->qid, tab->name, tab->length, eve, tab->perm, dp);
1991/0615		return 1;
1993/0724		if(nroot >= Nfiles) panic("too many root files"); rootdata[nroot] = contents; d = &rootdir[nroot]; strcpy(d->name, name); d->length = len; d->perm = 0555; d->qid.path = nroot+1; nroot++;
1991/0615		}
1990/0227		void rootreset(void) {
1991/0615		int i;                  i = 0; if(cfslen) rootmap[i++] = &rootpdir[0];
1992/0902		if(fslen)
1991/0913		rootmap[i++] = &rootpdir[1];
1991/0615		nroot = NROOT + i;
1993/0724		addrootfile("boot", bootcode, bootlen); /* always have a boot file */
1990/0227		} void
1993/0501/sys/src/9/port/devroot.c:117,129 – 1993/0724/sys/src/9/port/devroot.c:102,114
1991/1206		}
1992/0225		if((c->qid.path & ~CHDIR) != Qdir)
1992/0226		return 0;
1991/0615		return devwalk(c, name, rootdir, nroot, rootgen);
1993/0724		return devwalk(c, name, rootdir, nroot, devgen);
1990/0227		} void rootstat(Chan *c, char *dp) {
1991/0615		devstat(c, dp, rootdir, nroot, rootgen);
1993/0724		devstat(c, dp, rootdir, nroot, devgen);
1990/0227		} Chan*
1993/0501/sys/src/9/port/devroot.c:138,144 – 1993/0724/sys/src/9/port/devroot.c:123,129
1993/0501		break; }
1991/0615		return devopen(c, omode, rootdir, nroot, rootgen);
1993/0724		return devopen(c, omode, rootdir, nroot, devgen);
1990/0227		} void
1993/0501/sys/src/9/port/devroot.c:167,202 – 1993/0724/sys/src/9/port/devroot.c:152,166
1990/0227		long
1991/0411		rootread(Chan *c, void *buf, long n, ulong offset)
1990/0227		{
1993/0724		ulong t; Dirtab *d; uchar *data;
1993/0501		Recover *r;
1990/0227
1990/11211		switch(c->qid.path & ~CHDIR){
1993/0724		t = c->qid.path & ~CHDIR; switch(t){
1990/0227		case Qdir:
1991/0615		return devdirread(c, buf, n, rootdir, nroot, rootgen);
1990/0227		case Qboot: /* boot */
1991/1206		if(offset >= bootlen)
1990/0227		return 0;
1991/1206		if(offset+n > bootlen) n = bootlen - offset;
1992/0902		memmove(buf, bootcode+offset, n);
1991/0214		return n;
1991/0312		case Qcfs: /* cfs */
1991/0411		if(offset >= cfslen)
1991/0214		return 0;
1991/0411		if(offset+n > cfslen) n = cfslen - offset; memmove(buf, ((char*)cfscode)+offset, n);
1991/0910		return n;
1992/0902		case Qfs: /* fs */ if(offset >= fslen)
1991/0910		return 0;
1992/0902		if(offset+n > fslen) n = fslen - offset; memmove(buf, ((char*)fscode)+offset, n);
1990/0227		return n;
1993/0724		return devdirread(c, buf, n, rootdir, nroot, devgen);
1993/0501		case Qrecover: qlock(&reclist); if(waserror()) {
1993/0501/sys/src/9/port/devroot.c:220,230 – 1993/0724/sys/src/9/port/devroot.c:184,202
1993/0501		free(r->req); free(r); return n;
1993/0724		}
1993/0501
1990/0227		case Qdev:
1993/0724		if(t < Qboot)
1990/0227		return 0; } return 0;
1993/0724		d = &rootdir[t-1]; data = rootdata[t-1]; if(offset >= d->length) return 0; if(offset+n > d->length) n = d->length - offset; memmove(buf, data+offset, n); return n;
1990/0227		} long