Return to ex CVS log

Up to [Research Unix] / researchv10no / netfs / serv

researchv10 Norman

/*
 * parse the permission exceptions file
 */

#include <rf.h>
#include <stdio.h>
#include <ctype.h>

extern char *strchr();
extern char *malloc(), *realloc();

extern char rootname[];

Namemap *exulist, *exglist;
static int exuend, exgend;
static int exulim, exglim;

rdexcept(f)
FILE *f;
{
	char line[200];		/* big enough, ignore */
	char *typ, *arg;

	while (fgets(line, sizeof(line), f)) {
		if (crack(line, &typ, &arg) == 0)
			continue;
		if (strcmp(typ, "client") == 0
		&&  matchclient(arg)) {
			exclient(f);
			return (1);
		}
	}
	return (0);
}

/*
 * parse one line from the file
 * return 1 if it looks valid, 0 if not
 * a valid line has
 * at least two blank-separated tokens
 * and does not begin with `#'
 * the first token is a type,
 * the second an argument;
 * pointers to be filled in for each are supplied
 */
crack(line, tp, ap)
register char *line;
char **tp, **ap;
{

	if (line[0] == '#')
		return (0);
	while (isspace(*line))
		line++;
	if (line[0] == 0)
		return (0);
	*tp = line;
	while (!isspace(*line))
		line++;
	if (line[0] == 0)
		return (0);
	*line++ = 0;
	while (isspace(*line))
		line++;
	if (line[0] == 0)
		return (0);
	*ap = line;
	while (*line)
		line++;
	if (line[-1] == '\n')
		line[-1] = 0;
	return (1);
}

/*
 * is this the client section we want?
 * -- take the first match, and no other
 */
matchclient(cp)
char *cp;
{
	if (strcmp(cp, "*") == 0 || strcmp(cp, rfclient) == 0)
		return (1);
	return (0);
}

/*
 * found the right client section;
 * stash the info away
 * we know that only this client section will be examined,
 * so don't worry about the fact that the
 * next `client' line in the file may be swallowed
 */
exclient(f)
FILE *f;
{
	char line[200];		/* again, big enough */
	char *typ, *arg;

	while (fgets(line, sizeof(line), f)) {
		if (crack(line, &typ, &arg) == 0)
			continue;
		if (strcmp(typ, "client") == 0)
			break;		/* end of our section */
		else if (strcmp(typ, "param") == 0)
			exparam(arg);
		else if (strcmp(typ, "uid") == 0)
			exuid(arg, strchr(arg, '='));
		else if (strcmp(typ, "gid") == 0)
			exgid(arg);
		else if (strcmp(typ,  "unknownuser") == 0) {
			exuid(RFUNKNOWNUSER, arg);
			rfotherdeny = 1;
		} else if (strcmp(typ,  "unknowngroup") == 0) {
		} else
			rflog("unexpected except line: %s %s\n", typ, arg);
	}
}

exparam(par)
char *par;
{
	register char *val;

	if (strcmp(par, "root") == 0)
		strcpy(rootname, val);
	else if (strcmp(par, "otherok") == 0)
		rfotherdeny = (*val != '1');	/* 1 means others OK */
	else
		rflog("unexpected except param %s=%s\n", par, val);
}

exuid(arg, val)
char *arg, char *val;
{
	register Namemap *p;

	if (val == 0)
		return;
	if (val[0] == '=')
		*val++ = 0;
	if (exulist == NULL) {
		exulim = 10;
		if ((exulist = (Namemap *)malloc(exulim*sizeof(Namemap))) == NULL)
			rfpanic("no mem for except uids\n");
	}
	if (exuend >= exulim - 1) {
		exulim += 10;
		if ((exulist = (Namemap *)realloc((char *)exulist, exulim*sizeof(Namemap))) == NULL)
			rfpanic("no mem for except uids\n");
	}
	p = &exulist[exuend++];
	strncpy(p->cname, arg, sizeof(p->cname)-1);
	p->cname[sizeof(p->cname)-1] = 0;
	strncpy(p->sname, val, sizeof(p->sname)-1);
	p->sname[sizeof(p->sname)-1] = 0;
	p[1].cname[0] = 0;
}

exgid(arg)
char *arg;
{
	char *val;
	register Namemap *p;

	if ((val = strchr(arg, '=')) == NULL)
		return;		/* may be wrong */
	*val++ = 0;
	if (exglist == NULL) {
		exglim = 10;
		if ((exglist = (Namemap *)malloc(exglim*sizeof(Namemap))) == NULL)
			rfpanic("no mem for except uids\n");
	}
	if (exgend >= exglim-1) {
		exglim += 10;
		if ((exglist = (Namemap *)realloc((char *)exglist, exglim*sizeof(Namemap))) == NULL)
			rfpanic("no mem for except uids\n");
	}
	p = &exglist[exgend++];
	strncpy(p->cname, arg, sizeof(p->cname)-1);
	p->cname[sizeof(p->cname)-1] = 0;
	strncpy(p->sname, val, sizeof(p->sname)-1);
	p->sname[sizeof(p->sname)-1] = 0;
	p[1].cname[0] = 0;
}

This archive runs on limited infrastructure. Preserving old code on modern bandwidth. Automated agents are requested to crawl responsibly.