89 lines
2.3 KiB
C
89 lines
2.3 KiB
C
/* Author: Wietse Venema <wietse@wzv.win.tue.nl> */
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#include "bsd_locl.h"
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RCSID("$Id: utmpx_login.c,v 1.21 1999/03/29 17:57:31 joda Exp $");
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/* utmpx_login - update utmp and wtmp after login */
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#ifndef HAVE_UTMPX_H
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int utmpx_login(char *line, char *user, char *host) { return 0; }
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#else
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static void
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utmpx_update(struct utmpx *ut, char *line, char *user, char *host)
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{
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struct timeval tmp;
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char *clean_tty = clean_ttyname(line);
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strncpy(ut->ut_line, clean_tty, sizeof(ut->ut_line));
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#ifdef HAVE_STRUCT_UTMPX_UT_ID
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strncpy(ut->ut_id, make_id(clean_tty), sizeof(ut->ut_id));
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#endif
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strncpy(ut->ut_user, user, sizeof(ut->ut_user));
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strncpy(ut->ut_host, host, sizeof(ut->ut_host));
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#ifdef HAVE_STRUCT_UTMPX_UT_SYSLEN
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ut->ut_syslen = strlen(host) + 1;
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if (ut->ut_syslen > sizeof(ut->ut_host))
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ut->ut_syslen = sizeof(ut->ut_host);
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#endif
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ut->ut_type = USER_PROCESS;
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gettimeofday (&tmp, 0);
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ut->ut_tv.tv_sec = tmp.tv_sec;
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ut->ut_tv.tv_usec = tmp.tv_usec;
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pututxline(ut);
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#ifdef WTMPX_FILE
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updwtmpx(WTMPX_FILE, ut);
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#elif defined(WTMP_FILE)
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{
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struct utmp utmp;
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int fd;
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prepare_utmp (&utmp, line, user, host);
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if ((fd = open(_PATH_WTMP, O_WRONLY|O_APPEND, 0)) >= 0) {
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write(fd, &utmp, sizeof(struct utmp));
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close(fd);
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}
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}
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#endif
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}
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int
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utmpx_login(char *line, char *user, char *host)
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{
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struct utmpx *ut;
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pid_t mypid = getpid();
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int ret = (-1);
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/*
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* SYSV4 ttymon and login use tty port names with the "/dev/" prefix
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* stripped off. Rlogind and telnetd, on the other hand, make utmpx
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* entries with device names like /dev/pts/nnn. We therefore cannot use
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* getutxline(). Return nonzero if no utmp entry was found with our own
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* process ID for a login or user process.
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*/
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while ((ut = getutxent())) {
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/* Try to find a reusable entry */
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if (ut->ut_pid == mypid
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&& ( ut->ut_type == INIT_PROCESS
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|| ut->ut_type == LOGIN_PROCESS
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|| ut->ut_type == USER_PROCESS)) {
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utmpx_update(ut, line, user, host);
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ret = 0;
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break;
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}
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}
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if (ret == -1) {
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/* Grow utmpx file by one record. */
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struct utmpx newut;
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memset(&newut, 0, sizeof(newut));
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newut.ut_pid = mypid;
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utmpx_update(&newut, line, user, host);
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ret = 0;
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}
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endutxent();
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return (ret);
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}
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#endif /* HAVE_UTMPX_H */
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