64 lines
1.4 KiB
C
64 lines
1.4 KiB
C
/* getutline.c: A replacement for the getutline() function
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%%% copyright-cmetz-96
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This software is Copyright 1996-2001 by Craig Metz, All Rights Reserved.
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The Inner Net License Version 3 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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Modified by cmetz for OPIE 2.32. Fixed check for fread() return
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value.
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Modified by cmetz for OPIE 2.31. If the OS won't tell us where
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_PATH_UTMP is, play the SVID game, then use
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Autoconf-discovered values.
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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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#ifndef _PATH_UTMP
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#ifdef UTMP_FILE
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#define _PATH_UTMP UTMP_FILE
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#else /* UTMP_FILE */
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#define _PATH_UTMP PATH_UTMP_AC
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#endif /* UTMP_FILE */
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#endif /* _PATH_UTMP */
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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) != 1)
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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) == 1) {
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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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