mirror of
https://gogs.blitter.com/RLabs/goutmp
synced 2024-08-14 19:26:41 +00:00
132 lines
3.2 KiB
Go
132 lines
3.2 KiB
Go
// +build linux
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// Golang bindings for basic login/utmp accounting
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package goutmp
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//#include <stdio.h>
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//#include <stdlib.h>
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//#include <sys/file.h>
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//#include <string.h>
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//#include <unistd.h>
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//#include <stdint.h>
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//#include <time.h>
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//#include <pwd.h>
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//
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//#include <utmp.h>
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//#include <lastlog.h>
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//
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//typedef char char_t;
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//
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//
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//void pututmp(struct utmp* entry, char* uname, char* ptsname, char* host) {
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// entry->ut_type = USER_PROCESS;
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// entry->ut_pid = getpid();
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// strcpy(entry->ut_line, ptsname + strlen("/dev/"));
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//
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// strcpy(entry->ut_id, ptsname + strlen("/dev/pts/"));
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//
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// entry->ut_time = time(NULL);
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// strcpy(entry->ut_user, uname);
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// strcpy(entry->ut_host, host);
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// entry->ut_addr = 0;
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// setutent();
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// pututline(entry);
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//}
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//
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//void unpututmp(struct utmp* entry) {
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// entry->ut_type = DEAD_PROCESS;
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// memset(entry->ut_line, 0, UT_LINESIZE);
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// entry->ut_time = 0;
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// memset(entry->ut_user, 0, UT_NAMESIZE);
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// setutent();
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// pututline(entry);
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//
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// endutent();
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//}
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//
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//int putlastlogentry(int64_t t, int uid, char* line, char* host) {
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// int retval = 0;
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// FILE *f;
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// struct lastlog l;
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//
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// strncpy(l.ll_line, line, UT_LINESIZE);
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// l.ll_line[UT_LINESIZE-1] = '\0';
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// strncpy(l.ll_host, host, UT_HOSTSIZE);
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// l.ll_host[UT_HOSTSIZE-1] = '\0';
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//
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// l.ll_time = (time_t)t;
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// //printf("l: ll_line '%s', ll_host '%s', ll_time %d\n", l.ll_line, l.ll_host, l.ll_time);
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//
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// /* Write lastlog entry at fixed offset (uid * sizeof(struct lastlog) */
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// if( NULL != (f = fopen("/var/log/lastlog", "rw+")) ) {
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// if( !fseek(f, (uid * sizeof(struct lastlog)), SEEK_SET) ) {
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// int fd = fileno(f);
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// if( write(fd, &l, sizeof(l)) == sizeof(l) ) {
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// retval = 1;
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// //int32_t stat = system("echo ---- lastlog ----; lastlog");
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// }
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// }
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// fclose(f);
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// }
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// return retval;
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//}
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import "C"
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import (
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"fmt"
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"net"
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"os/user"
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"strings"
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"time"
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)
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// UtmpEntry wraps the C struct utmp
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type UtmpEntry struct {
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entry C.struct_utmp
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}
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// return remote client hostname or IP if host lookup fails
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// addr is expected to be of the format given by net.Addr.String()
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// eg., "127.0.0.1:80" or "[::1]:80"
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func GetHost(addr string) (h string) {
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if !strings.Contains(addr, "[") {
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h = strings.Split(addr, ":")[0]
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} else {
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h = strings.Split(strings.Split(addr, "[")[1], "]")[0]
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}
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hList, e := net.LookupAddr(h)
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//fmt.Printf("lookupAddr:%v\n", hList)
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if e == nil {
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h = hList[0]
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}
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return
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}
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// Put a username and the originating host/IP to utmp
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func Put_utmp(user, ptsName, host string) UtmpEntry {
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var entry UtmpEntry
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//log.Println("Put_utmp:host ", host, " user ", user)
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C.pututmp(&entry.entry, C.CString(user), C.CString(ptsName), C.CString(host))
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return entry
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}
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// Remove a username/host entry from utmp
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func Unput_utmp(entry UtmpEntry) {
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C.unpututmp(&entry.entry)
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}
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// Put the login app, username and originating host/IP to lastlog
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func Put_lastlog_entry(app, usr, ptsname, host string) {
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u, e := user.Lookup(usr)
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if e != nil {
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return
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}
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var uid uint32
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fmt.Sscanf(u.Uid, "%d", &uid)
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t := time.Now().Unix()
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_ = C.putlastlogentry(C.int64_t(t), C.int(uid), C.CString(app), C.CString(host))
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//stat := C.putlastlogentry(C.int64_t(t), C.int(uid), C.CString(app), C.CString(host))
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//fmt.Println("stat was:",stat)
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}
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