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/* getutline.c: A replacement for the getutline() function
%%% copyright-cmetz-96
This software is Copyright 1996-2001 by Craig Metz, All Rights Reserved.
The Inner Net License Version 3 applies to this software.
You should have received a copy of the license with this software. If
you didn't get a copy, you may request one from <license@inner.net>.
History:
Modified by cmetz for OPIE 2.32. Fixed check for fread() return
value.
Modified by cmetz for OPIE 2.31. If the OS won't tell us where
_PATH_UTMP is, play the SVID game, then use
Autoconf-discovered values.
Created by cmetz for OPIE 2.3.
*/
#include "opie_cfg.h"
#include <stdio.h>
#include <utmp.h>
#include "opie.h"
static struct utmp u;
#ifndef _PATH_UTMP
#ifdef UTMP_FILE
#define _PATH_UTMP UTMP_FILE
#else /* UTMP_FILE */
#define _PATH_UTMP PATH_UTMP_AC
#endif /* UTMP_FILE */
#endif /* _PATH_UTMP */
struct utmp *getutline FUNCTION((utmp), struct utmp *utmp)
{
FILE *f;
int i;
if (!(f = __opieopen(_PATH_UTMP, 0, 0644)))
return 0;
#if HAVE_TTYSLOT
if (i = ttyslot()) {
if (fseek(f, i * sizeof(struct utmp), SEEK_SET) < 0)
goto ret;
if (fread(&u, sizeof(struct utmp), 1, f) != 1)
goto ret;
fclose(f);
return &u;
}
#endif /* HAVE_TTYSLOT */
while(fread(&u, sizeof(struct utmp), 1, f) == 1) {
if (!strncmp(utmp->ut_line, u.ut_line, sizeof(u.ut_line) - 1)) {
fclose(f);
return &u;
}
}
ret:
fclose(f);
return NULL;
}
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