56 lines
1.6 KiB
C
56 lines
1.6 KiB
C
/*
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* Copyright (c) 2015 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 <config.h>
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#include <sys/types.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <stddef.h>
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#include <unistd.h>
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#include "sudo_compat.h"
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#include "sudo_util.h"
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/*
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* Return a malloc()ed copy of the system hostname, or NULL if
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* malloc() or gethostname() fails.
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*/
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char *
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sudo_gethostname_v1(void)
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{
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char *hname;
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size_t host_name_max;
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#ifdef _SC_HOST_NAME_MAX
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host_name_max = (size_t)sysconf(_SC_HOST_NAME_MAX);
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if (host_name_max == (size_t)-1)
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#endif
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host_name_max = 255; /* POSIX and historic BSD */
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hname = malloc(host_name_max + 1);
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if (hname != NULL) {
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if (gethostname(hname, host_name_max + 1) == 0) {
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/* Old gethostname() may not NUL-terminate if there is no room. */
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hname[host_name_max] = '\0';
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} else {
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free(hname);
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hname = NULL;
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}
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}
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return hname;
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}
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