68 lines
1.7 KiB
C
68 lines
1.7 KiB
C
/* getusershell.c: minimal implementation of the getusershell() and
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endusershell() library routines for systems that don't have them.
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%%% portions-copyright-cmetz
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Portions of this software are Copyright 1996 by Craig Metz, All Rights
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Reserved. The Inner Net License Version 2 applies to these portions of
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the 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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Portions of this software are Copyright 1995 by Randall Atkinson and Dan
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McDonald, All Rights Reserved. All Rights under this copyright are assigned
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to the U.S. Naval Research Laboratory (NRL). The NRL Copyright Notice and
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License Agreement applies to this software.
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History:
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Modified by cmetz for OPIE 2.2. Use FUNCTION declaration et al.
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Modified at NRL for OPIE 2.1. Remove trailing newlines from
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/etc/shells entries. Fixed infinite loop. Fixed a bug
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where second invocation on would fail.
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Written at NRL for OPIE 2.0.
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*/
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#include "opie_cfg.h"
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#include <stdio.h>
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#if HAVE_STRING_H
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#include <string.h>
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#endif /* HAVE_STRING_H */
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#include "opie.h"
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static FILE *fh = NULL;
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static char *internal[] = {"/bin/sh", "/bin/csh", NULL};
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static int i = 0;
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static char buffer[1024];
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char *getusershell FUNCTION_NOARGS
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{
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char *c;
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if (!fh)
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fh = fopen("/etc/shells", "r");
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if (fh) {
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if (fgets(buffer, sizeof(buffer), fh)) {
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if (c = strchr(buffer, '\n'))
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*c = 0;
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return buffer;
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} else {
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fclose(fh);
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return NULL;
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}
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} else {
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if (internal[i])
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return internal[i++];
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else
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return NULL;
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}
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}
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VOIDRET endusershell FUNCTION_NOARGS
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{
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if (fh) {
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fclose(fh);
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fh = NULL;
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}
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i = 0;
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}
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