/* $Id$ */ #include #include #include #include #include #include #include #include #include #include #include #include "config.h" #ifdef Solaris #include #define U_FILE UTMPX_FILE #else #include #define U_FILE UTMP_FILE #endif #ifdef FreeBSD #define UTMP_FILE _PATH_UTMP #endif #ifndef Solaris #if MAXHOSTNAMELEN < UT_HOSTSIZE #define MAX_HOMENAME_LEN MAXHOSTNAMELEN #else #define MAX_HOMENAME_LEN UT_HOSTSIZE #endif #else /* according to /usr/include/utmpx.h ... */ #define MAX_HOMENAME_LEN 256 #endif /* fill the hid with from hostname */ void gethid(char *hid, char *tty) { char frombuf[100]; if (getenv("SSH_CLIENT")) sscanf(getenv("SSH_CLIENT"), "%s", frombuf); else strcpy(frombuf, "127.0.0.1"); if (strrchr(frombuf, ':')) strncpy(hid, strrchr(frombuf, ':') + 1, MAX_HOMENAME_LEN); else strncpy(hid, frombuf, MAX_HOMENAME_LEN); } /* show ban file if filename exist, print it out, sleep 1 second, and return 0; otherwise, return -1. */ int showbanfile(char *filename) { FILE *fp; char buf[256]; fp = fopen(filename, "r"); if (fp) { while (fgets(buf, sizeof(buf), fp)) fputs(buf, stdout); printf("\n=============================" "=============================\n"); fclose(fp); sleep(1); } return fp ? 0 : -1; } int main(void) { int uid, rtv = 0; char *tty, ttybuf[32], hid[MAX_HOMENAME_LEN + 1]; #ifndef Solaris openlog("bbsrf", LOG_PID | LOG_PERROR, LOG_USER); #else openlog("bbsrf", LOG_PID, LOG_USER); #endif chdir(BBSHOME); uid = getuid(); while (1) { if (!showbanfile(BAN_FILE)) { rtv = 1; break; } else if (uid != BBSUID) { syslog(LOG_ERR, "UID DOES NOT MATCH"); rtv = -1; break; } else if (!getpwuid(uid)) { syslog(LOG_ERR, "YOU DONT EXIST"); rtv = -1; break; } else { tty = ttyname(0); if (tty) { strcpy(ttybuf, tty); gethid(hid, ttybuf); } else { strcpy(ttybuf, "notty"); strcpy(hid, "unknown"); } execl(BBSPROG, "mbbsd", hid, ttybuf, NULL); syslog(LOG_ERR, "execl(): %m"); sleep(3); // prevent flooding rtv = -1; } break; } return rtv; }