1993/0501/port/devroot.c (diff list | history)

1992/0902/sys/src/9/port/devroot.c:6,12 – 1993/0501/sys/src/9/port/devroot.c:6,13 (short | long | prev | next)
1992/0111		#include "../port/error.h"
1990/0227		#include "devtab.h" enum{
1993/0501		enum {
1990/0227		Qdir, Qbin, Qdev,
1992/0902/sys/src/9/port/devroot.c:13,18 – 1993/0501/sys/src/9/port/devroot.c:14,20
1990/0227		Qenv, Qproc,
1992/0213		Qnet,
1993/0501		Qrecover,
1991/1206		Qboot, Qcfs,
1992/0902/sys/src/9/port/devroot.c:33,38 – 1993/0501/sys/src/9/port/devroot.c:35,41
1991/1112		"env", {Qenv|CHDIR}, 0, 0777, "proc", {Qproc|CHDIR}, 0, 0777,
1992/0213		"net", {Qnet|CHDIR}, 0, 0777,
1993/0501		"recover", {Qrecover}, 0, 0777,
1990/0227		}; #define NROOT (sizeof rootdir/sizeof(Dirtab))
1991/0615		Dirtab rootpdir[]={
1992/0902/sys/src/9/port/devroot.c:42,47 – 1993/0501/sys/src/9/port/devroot.c:45,66
1991/0615		Dirtab *rootmap[sizeof rootpdir/sizeof(Dirtab)];
1991/0214		int nroot;
1990/0227
1993/0501		typedef struct Recover Recover; struct Recover { int len; char *req; Recover *next; }; struct { Lock; QLock; Rendez; Recover *q; }reclist;
1991/0615		int rootgen(Chan *c, Dirtab *tab, int ntab, int i, Dir *dp) {
1992/0902/sys/src/9/port/devroot.c:110,115 – 1993/0501/sys/src/9/port/devroot.c:129,143
1990/0227		Chan* rootopen(Chan *c, int omode) {
1993/0501		switch(c->qid.path & ~CHDIR) { default: break; case Qrecover: if(strcmp(up->user, eve) != 0) error(Eperm); break; }
1991/0615		return devopen(c, omode, rootdir, nroot, rootgen);
1990/0227		}
1992/0902/sys/src/9/port/devroot.c:129,137 – 1993/0501/sys/src/9/port/devroot.c:157,173
1991/1115		USED(c);
1990/0227		}
1993/0501		int rdrdy(void *a) { USED(a); return reclist.q != 0; }
1990/0227		long
1991/0411		rootread(Chan *c, void *buf, long n, ulong offset)
1990/0227		{
1993/0501		Recover *r;
1990/0227
1990/11211		switch(c->qid.path & ~CHDIR){
1990/0227		case Qdir:
1992/0902/sys/src/9/port/devroot.c:161,166 – 1993/0501/sys/src/9/port/devroot.c:197,226
1992/0902		memmove(buf, ((char*)fscode)+offset, n);
1990/0227		return n;
1993/0501		case Qrecover: qlock(&reclist); if(waserror()) { qunlock(&reclist); nexterror(); } sleep(&reclist, rdrdy, 0); lock(&reclist); r = reclist.q; reclist.q = r->next; unlock(&reclist); qunlock(&reclist); poperror(); if(n < r->len) n = r->len; memmove(buf, r->req, n); free(r->req); free(r); return n;
1990/0227		case Qdev: return 0; }
1992/0902/sys/src/9/port/devroot.c:170,178 – 1993/0501/sys/src/9/port/devroot.c:230,251
1990/0227		long
1991/0411		rootwrite(Chan *c, void *buf, long n, ulong offset)
1990/0227		{
1991/1115		USED(c, buf, n, offset);
1990/11211		error(Egreg);
1992/0520		return 0; /* not reached */
1993/0501		char tmp[256]; USED(offset); switch(c->qid.path & ~CHDIR){ default: error(Egreg); case Qrecover: if(n > sizeof(tmp)-1) error(Etoosmall); /* Nul terminate */ memmove(tmp, buf, n); tmp[n] = '\0'; mntrepl(tmp); return n; } return 0;
1990/0227		} void
1992/0902/sys/src/9/port/devroot.c:187,190 – 1993/0501/sys/src/9/port/devroot.c:260,281
1990/0227		{
1991/1115		USED(c, dp);
1990/11211		error(Eperm);
1993/0501		} void rootrecover(Path *p, char *mntname) { int i; Recover *r; char buf[256]; r = malloc(sizeof(Recover)); i = ptpath(p, buf, sizeof(buf)); r->req = smalloc(i+strlen(mntname)+2); sprint(r->req, "%s %s", buf, mntname); lock(&reclist); r->next = reclist.q; reclist.q = r; unlock(&reclist); wakeup(&reclist);
1990/0227		}