51 lines
1.1 KiB
C
51 lines
1.1 KiB
C
/* getutline.c: A replacement for the getutline() function
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%%% copyright-cmetz
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This software is Copyright 1996 by Craig Metz, All Rights Reserved.
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The Inner Net License Version 2 applies to this software.
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You should have received a copy of the license with this software. If
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you didn't get a copy, you may request one from <license@inner.net>.
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History:
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Created by cmetz for OPIE 2.3.
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*/
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#include "opie_cfg.h"
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#include <stdio.h>
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#include <utmp.h>
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#include "opie.h"
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static struct utmp u;
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struct utmp *getutline FUNCTION((utmp), struct utmp *utmp)
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{
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FILE *f;
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int i;
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if (!(f = __opieopen(_PATH_UTMP, 0, 0644)))
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return 0;
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#if HAVE_TTYSLOT
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if (i = ttyslot()) {
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if (fseek(f, i * sizeof(struct utmp), SEEK_SET) < 0)
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goto ret;
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if (fread(&u, sizeof(struct utmp), 1, f) != sizeof(struct utmp))
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goto ret;
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fclose(f);
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return &u;
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}
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#endif /* HAVE_TTYSLOT */
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while(fread(&u, sizeof(struct utmp), 1, f) == sizeof(struct utmp)) {
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if (!strncmp(utmp->ut_line, u.ut_line, sizeof(u.ut_line) - 1)) {
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fclose(f);
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return &u;
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}
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}
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ret:
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fclose(f);
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return NULL;
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}
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