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/* $Id: util_passwd.c,v 1.3 2002/11/02 11:02:44 in2 Exp $ */
#include <stdio.h>
#include <string.h>
#include <fcntl.h>
#include <errno.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/mman.h>
#include <sys/ipc.h>
#include <sys/sem.h>
#include "config.h"
#include "pttstruct.h"
#include "modes.h"
#include "common.h"
#include "proto.h"
#ifndef SEM_R
#define SEM_R 0400
#endif
#ifndef SEM_A
#define SEM_A 0200
#endif
#ifndef __FreeBSD__
union semun {
int val; /* value for SETVAL */
struct semid_ds *buf; /* buffer for IPC_STAT & IPC_SET */
u_short *array; /* array for GETALL & SETALL */
struct seminfo *__buf; /* buffer for IPC_INFO */
};
#endif
static userec_t *passwd_image = NULL;
static int passwd_image_size;
static int semid = -1;
int passwd_mmap(void) {
int fd;
if(passwd_image!=NULL) return 0;
fd = open(FN_PASSWD, O_RDWR);
if(fd > 0) {
struct stat st;
fstat(fd, &st);
passwd_image_size = st.st_size;
passwd_image = mmap(NULL, passwd_image_size,
PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
if(passwd_image == (userec_t *)-1) {
perror("mmap");
return -1;
}
close(fd);
semid = semget(PASSWDSEM_KEY, 1, SEM_R | SEM_A | IPC_CREAT | IPC_EXCL);
if(semid == -1) {
if(errno == EEXIST) {
semid = semget(PASSWDSEM_KEY, 1, SEM_R | SEM_A);
if(semid == -1) {
perror("semget");
exit(1);
}
} else {
perror("semget");
exit(1);
}
} else {
union semun s;
s.val = 1;
if(semctl(semid, 0, SETVAL, s) == -1) {
perror("semctl");
exit(1);
}
}
} else {
perror(FN_PASSWD);
return -1;
}
return 0;
}
int passwd_update_money(int num) {
int money;
if(num < 1 || num > MAX_USERS)
return -1;
money = moneyof(num);
memcpy(&passwd_image[num - 1].money, &money, sizeof(int));
return 0;
}
int passwd_update(int num, userec_t *buf) {
if(num < 1 || num > MAX_USERS)
return -1;
buf->money = moneyof(num);
memcpy(&passwd_image[num - 1], buf, sizeof(userec_t));
return 0;
}
int passwd_query(int num, userec_t *buf) {
if(num < 1 || num > MAX_USERS)
return -1;
memcpy(buf, &passwd_image[num - 1], sizeof(userec_t));
return 0;
}
int passwd_apply(int (*fptr)(userec_t *)) {
int i;
for(i = 0; i < MAX_USERS; i++)
if((*fptr)(&passwd_image[i]) == QUIT)
return QUIT;
return 0;
}
int passwd_apply2(int (*fptr)(int, userec_t *)) {
int i;
for(i = 0; i < MAX_USERS; i++)
if((*fptr)(i, &passwd_image[i]) == QUIT)
return QUIT;
return 0;
}
void passwd_lock() {
struct sembuf buf = { 0, -1, SEM_UNDO };
if(semop(semid, &buf, 1)) {
perror("semop");
exit(1);
}
}
void passwd_unlock() {
struct sembuf buf = { 0, 1, SEM_UNDO };
if(semop(semid, &buf, 1)) {
perror("semop");
exit(1);
}
}
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