#ifndef lint
#if 0
static char sccsid[] = "@(#)cache.c 8.1 (Berkeley) 5/31/93";
#else
static char rcsid[] __attribute__((__unused__)) = "$OpenBSD: cache.c,v 1.6 1997/07/25 18:58:27 mickey 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;
#ifdef __STDC__
int
uidtb_start(void)
#else
int
uidtb_start()
#endif
{
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);
}
#ifdef __STDC__
int
gidtb_start(void)
#else
int
gidtb_start()
#endif
{
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);
}
#ifdef __STDC__
int
usrtb_start(void)
#else
int
usrtb_start()
#endif
{
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);
}
#ifdef __STDC__
int
grptb_start(void)
#else
int
grptb_start()
#endif
{
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);
}
#ifdef __STDC__
char *
name_uid(uid_t uid, int frc)
#else
char *
name_uid(uid, frc)
uid_t uid;
int frc;
#endif
{
register struct passwd *pw;
register UIDC *ptr;
register int hash;
if ((uidtb == NULL) && (uidtb_start() < 0))
return("");
hash = uid % UID_SZ;
ptr = uidtb[hash];
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 = (UIDC *)malloc(sizeof(UIDC));
if ((pw = getpwuid(uid)) == NULL) {
if (ptr == NULL)
return("");
ptr->uid = uid;
ptr->valid = INVALID;
# ifdef NET2_STAT
(void)snprintf(ptr->name, sizeof(ptr->name), "%u", uid);
# else
(void)snprintf(ptr->name, sizeof(ptr->name), "%lu",
(unsigned long)uid);
# endif
uidtb[hash] = ptr;
if (frc == 0)
return("");
} else {
if (ptr == NULL)
return(pw->pw_name);
ptr->uid = uid;
(void)strncpy(ptr->name, pw->pw_name, UNMLEN-1);
ptr->name[UNMLEN-1] = '\0';
ptr->valid = VALID;
uidtb[hash] = ptr;
}
return(ptr->name);
}
#ifdef __STDC__
char *
name_gid(gid_t gid, int frc)
#else
char *
name_gid(gid, frc)
gid_t gid;
int frc;
#endif
{
register struct group *gr;
register GIDC *ptr;
register int hash;
if ((gidtb == NULL) && (gidtb_start() < 0))
return("");
hash = gid % GID_SZ;
ptr = gidtb[hash];
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 = (GIDC *)malloc(sizeof(GIDC));
if ((gr = getgrgid(gid)) == NULL) {
if (ptr == NULL)
return("");
ptr->gid = gid;
ptr->valid = INVALID;
# ifdef NET2_STAT
(void)snprintf(ptr->name, sizeof(ptr->name), "%u", gid);
# else
(void)snprintf(ptr->name, sizeof(ptr->name), "%lu",
(unsigned long)gid);
# endif
gidtb[hash] = ptr;
if (frc == 0)
return("");
} else {
if (ptr == NULL)
return(gr->gr_name);
ptr->gid = gid;
(void)strncpy(ptr->name, gr->gr_name, GNMLEN-1);
ptr->name[GNMLEN-1] = '\0';
ptr->valid = VALID;
gidtb[hash] = ptr;
}
return(ptr->name);
}
#ifdef __STDC__
int
uid_name(char *name, uid_t *uid)
#else
int
uid_name(name, uid)
char *name;
uid_t *uid;
#endif
{
register struct passwd *pw;
register UIDC *ptr;
register int namelen;
register int hash;
if (((namelen = strlen(name)) == 0) || (name[0] == '\0'))
return(-1);
if ((usrtb == NULL) && (usrtb_start() < 0))
return(-1);
hash = st_hash(name, namelen, UNM_SZ);
ptr = usrtb[hash];
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 = (UIDC *)malloc(sizeof(UIDC));
if (ptr == NULL) {
if ((pw = getpwnam(name)) == NULL)
return(-1);
*uid = pw->pw_uid;
return(0);
}
usrtb[hash] = ptr;
(void)strncpy(ptr->name, name, UNMLEN-1);
ptr->name[UNMLEN-1] = '\0';
if ((pw = getpwnam(name)) == NULL) {
ptr->valid = INVALID;
return(-1);
}
ptr->valid = VALID;
*uid = ptr->uid = pw->pw_uid;
return(0);
}
#ifdef __STDC__
int
gid_name(char *name, gid_t *gid)
#else
int
gid_name(name, gid)
char *name;
gid_t *gid;
#endif
{
register struct group *gr;
register GIDC *ptr;
register int namelen;
register int hash;
if (((namelen = strlen(name)) == 0) || (name[0] == '\0'))
return(-1);
if ((grptb == NULL) && (grptb_start() < 0))
return(-1);
hash = st_hash(name, namelen, GID_SZ);
ptr = grptb[hash];
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 = (GIDC *)malloc(sizeof(GIDC));
if (ptr == NULL) {
if ((gr = getgrnam(name)) == NULL)
return(-1);
*gid = gr->gr_gid;
return(0);
}
grptb[hash] = ptr;
(void)strncpy(ptr->name, name, GNMLEN-1);
ptr->name[GNMLEN-1] = '\0';
if ((gr = getgrnam(name)) == NULL) {
ptr->valid = INVALID;
return(-1);
}
ptr->valid = VALID;
*gid = ptr->gid = gr->gr_gid;
return(0);
}