48 lines
1.4 KiB
C
48 lines
1.4 KiB
C
/*
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* Copyright (c) 2004 Todd C. Miller <Todd.Miller@courtesan.com>
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#include <sys/types.h>
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#include <unistd.h>
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#include "config.h"
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#ifndef lint
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static const char rcsid[] = "$Sudo$";
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#endif /* lint */
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/*
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* Close all file descriptors greater than or equal to lowfd.
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* We cannot rely on resource limits since it is possible to
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* open a file descriptor and then drop the rlimit such that
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* it is below the open fd.
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*/
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void
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closefrom(lowfd)
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int lowfd;
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{
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int fd, maxfd;
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#ifdef HAVE_SYSCONF
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maxfd = sysconf(_SC_OPEN_MAX);
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#else
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maxfd = getdtablesize();
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#endif /* HAVE_SYSCONF */
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for (fd = lowfd; fd < maxfd; fd++)
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(void) close(fd);
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return;
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}
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