#ifndef lint
#if 0
static const char sccsid[] = "@(#)cache.c 8.1 (Berkeley) 5/31/93";
#else
static const char rcsid[] = "$OpenBSD: cache.c,v 1.17 2004/03/16 03:28:34 tedu Exp $";
#endif
#endif
#include <sys/types.h>
#include <sys/time.h>
#include <sys/stat.h>
#include <sys/param.h>
#include <string.h>
#include <stdio.h>
#include <pwd.h>
#include <grp.h>
#include <unistd.h>
#include <stdlib.h>
#include "pax.h"
#include "cache.h"
#include "extern.h"
static int pwopn = 0;
static int gropn = 0;
static UIDC **uidtb = NULL;
static GIDC **gidtb = NULL;
static UIDC **usrtb = NULL;
static GIDC **grptb = NULL;
int
uidtb_start(void)
{
static int fail = 0;
if (uidtb != NULL)
return(0);
if (fail)
return(-1);
if ((uidtb = (UIDC **)calloc(UID_SZ, sizeof(UIDC *))) == NULL) {
++fail;
paxwarn(1, "Unable to allocate memory for user id cache table");
return(-1);
}
return(0);
}
int
gidtb_start(void)
{
static int fail = 0;
if (gidtb != NULL)
return(0);
if (fail)
return(-1);
if ((gidtb = (GIDC **)calloc(GID_SZ, sizeof(GIDC *))) == NULL) {
++fail;
paxwarn(1, "Unable to allocate memory for group id cache table");
return(-1);
}
return(0);
}
int
usrtb_start(void)
{
static int fail = 0;
if (usrtb != NULL)
return(0);
if (fail)
return(-1);
if ((usrtb = (UIDC **)calloc(UNM_SZ, sizeof(UIDC *))) == NULL) {
++fail;
paxwarn(1, "Unable to allocate memory for user name cache table");
return(-1);
}
return(0);
}
int
grptb_start(void)
{
static int fail = 0;
if (grptb != NULL)
return(0);
if (fail)
return(-1);
if ((grptb = (GIDC **)calloc(GNM_SZ, sizeof(GIDC *))) == NULL) {
++fail;
paxwarn(1,"Unable to allocate memory for group name cache table");
return(-1);
}
return(0);
}
char *
name_uid(uid_t uid, int frc)
{
struct passwd *pw;
UIDC *ptr;
if ((uidtb == NULL) && (uidtb_start() < 0))
return("");
ptr = uidtb[uid % UID_SZ];
if ((ptr != NULL) && (ptr->valid > 0) && (ptr->uid == uid)) {
if (frc || (ptr->valid == VALID))
return(ptr->name);
return("");
}
if (!pwopn) {
setpassent(1);
++pwopn;
}
if (ptr == NULL)
ptr = uidtb[uid % UID_SZ] = malloc(sizeof(UIDC));
if ((pw = getpwuid(uid)) == NULL) {
if (ptr == NULL)
return("");
ptr->uid = uid;
ptr->valid = INVALID;
(void)snprintf(ptr->name, sizeof(ptr->name), "%lu",
(unsigned long)uid);
if (frc == 0)
return("");
} else {
if (ptr == NULL)
return(pw->pw_name);
ptr->uid = uid;
(void)strlcpy(ptr->name, pw->pw_name, sizeof(ptr->name));
ptr->valid = VALID;
}
return(ptr->name);
}
char *
name_gid(gid_t gid, int frc)
{
struct group *gr;
GIDC *ptr;
if ((gidtb == NULL) && (gidtb_start() < 0))
return("");
ptr = gidtb[gid % GID_SZ];
if ((ptr != NULL) && (ptr->valid > 0) && (ptr->gid == gid)) {
if (frc || (ptr->valid == VALID))
return(ptr->name);
return("");
}
if (!gropn) {
setgroupent(1);
++gropn;
}
if (ptr == NULL)
ptr = gidtb[gid % GID_SZ] = malloc(sizeof(GIDC));
if ((gr = getgrgid(gid)) == NULL) {
if (ptr == NULL)
return("");
ptr->gid = gid;
ptr->valid = INVALID;
(void)snprintf(ptr->name, sizeof(ptr->name), "%lu",
(unsigned long)gid);
if (frc == 0)
return("");
} else {
if (ptr == NULL)
return(gr->gr_name);
ptr->gid = gid;
(void)strlcpy(ptr->name, gr->gr_name, sizeof(ptr->name));
ptr->valid = VALID;
}
return(ptr->name);
}
int
uid_name(char *name, uid_t *uid)
{
struct passwd *pw;
UIDC *ptr;
int namelen;
if (((namelen = strlen(name)) == 0) || (name[0] == '\0'))
return(-1);
if ((usrtb == NULL) && (usrtb_start() < 0))
return(-1);
ptr = usrtb[st_hash(name, namelen, UNM_SZ)];
if ((ptr != NULL) && (ptr->valid > 0) && !strcmp(name, ptr->name)) {
if (ptr->valid == INVALID)
return(-1);
*uid = ptr->uid;
return(0);
}
if (!pwopn) {
setpassent(1);
++pwopn;
}
if (ptr == NULL)
ptr = usrtb[st_hash(name, namelen, UNM_SZ)] =
(UIDC *)malloc(sizeof(UIDC));
if (ptr == NULL) {
if ((pw = getpwnam(name)) == NULL)
return(-1);
*uid = pw->pw_uid;
return(0);
}
(void)strlcpy(ptr->name, name, sizeof(ptr->name));
if ((pw = getpwnam(name)) == NULL) {
ptr->valid = INVALID;
return(-1);
}
ptr->valid = VALID;
*uid = ptr->uid = pw->pw_uid;
return(0);
}
int
gid_name(char *name, gid_t *gid)
{
struct group *gr;
GIDC *ptr;
int namelen;
if (((namelen = strlen(name)) == 0) || (name[0] == '\0'))
return(-1);
if ((grptb == NULL) && (grptb_start() < 0))
return(-1);
ptr = grptb[st_hash(name, namelen, GID_SZ)];
if ((ptr != NULL) && (ptr->valid > 0) && !strcmp(name, ptr->name)) {
if (ptr->valid == INVALID)
return(-1);
*gid = ptr->gid;
return(0);
}
if (!gropn) {
setgroupent(1);
++gropn;
}
if (ptr == NULL)
ptr = grptb[st_hash(name, namelen, GID_SZ)] =
(GIDC *)malloc(sizeof(GIDC));
if (ptr == NULL) {
if ((gr = getgrnam(name)) == NULL)
return(-1);
*gid = gr->gr_gid;
return(0);
}
(void)strlcpy(ptr->name, name, sizeof(ptr->name));
if ((gr = getgrnam(name)) == NULL) {
ptr->valid = INVALID;
return(-1);
}
ptr->valid = VALID;
*gid = ptr->gid = gr->gr_gid;
return(0);
}