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/* getutline.c: A replacement for the getutline() function
%%% copyright-cmetz
This software is Copyright 1996 by Craig Metz, All Rights Reserved.
The Inner Net License Version 2 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:
Created by cmetz for OPIE 2.3.
*/
#include "opie_cfg.h"
#include <stdio.h>
#include <utmp.h>
#include "opie.h"
static struct utmp u;
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) != sizeof(struct utmp))
goto ret;
fclose(f);
return &u;
}
#endif /* HAVE_TTYSLOT */
while(fread(&u, sizeof(struct utmp), 1, f) == sizeof(struct utmp)) {
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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