mirror of https://github.com/sudo-project/sudo.git
92 lines
2.7 KiB
C
92 lines
2.7 KiB
C
/*
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* SPDX-License-Identifier: ISC
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*
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* Copyright (c) 2018-2023 Todd C. Miller <Todd.Miller@sudo.ws>
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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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/*
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* This is an open source non-commercial project. Dear PVS-Studio, please check it.
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* PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
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*/
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#include <config.h>
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#include <errno.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sudoers.h>
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/*
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* Set ctx->user.host. ctx->user.shost, ctx->runas.host and ctx->runas.shost
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* based on the local and remote host names. If host is NULL, the local
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* host name is used. If remhost is NULL, the same value as host is used.
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*/
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bool
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sudoers_sethost(struct sudoers_context *ctx, const char *host,
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const char *remhost)
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{
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char *cp;
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debug_decl(sudoers_sethost, SUDOERS_DEBUG_UTIL);
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if (ctx->user.shost != ctx->user.host)
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free(ctx->user.shost);
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free(ctx->user.host);
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ctx->user.host = NULL;
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ctx->user.shost = NULL;
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if (host == NULL) {
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ctx->user.host = sudo_gethostname();
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if (ctx->user.host == NULL && errno != ENOMEM)
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ctx->user.host = strdup("localhost");
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} else {
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ctx->user.host = strdup(host);
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}
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if (ctx->user.host == NULL)
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goto oom;
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if ((cp = strchr(ctx->user.host, '.')) != NULL) {
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ctx->user.shost = strndup(ctx->user.host,
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(size_t)(cp - ctx->user.host));
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if (ctx->user.shost == NULL)
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goto oom;
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} else {
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ctx->user.shost = ctx->user.host;
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}
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if (ctx->runas.shost != ctx->runas.host)
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free(ctx->runas.shost);
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free(ctx->runas.host);
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ctx->runas.host = NULL;
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ctx->runas.shost = NULL;
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ctx->runas.host = strdup(remhost ? remhost : ctx->user.host);
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if (ctx->runas.host == NULL)
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goto oom;
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if ((cp = strchr(ctx->runas.host, '.')) != NULL) {
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ctx->runas.shost = strndup(ctx->runas.host,
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(size_t)(cp - ctx->runas.host));
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if (ctx->runas.shost == NULL)
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goto oom;
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} else {
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ctx->runas.shost = ctx->runas.host;
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}
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debug_return_bool(true);
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oom:
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sudo_warnx(U_("%s: %s"), __func__, U_("unable to allocate memory"));
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debug_return_bool(false);
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}
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