2b22a6909d
Closes #325 Add a new subid_init() function which can be used to specify the stream on which error messages should be printed. (If you want to get fancy you can redirect that to memory :) If subid_init() is not called, use stderr. If NULL is passed, then /dev/null will be used. This patch also fixes up the 'Prog', which previously had to be defined by any program linking against libsubid. Now, by default in libsubid it will show (subid). Once subid_init() is called, it will use the first variable passed to subid_init(). Signed-off-by: Serge Hallyn <serge@hallyn.com>
137 lines
3.9 KiB
C
137 lines
3.9 KiB
C
/*
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* Copyright (c) 2020 Serge Hallyn
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the copyright holders or contributors may not be used to
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* endorse or promote products derived from this software without
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* specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
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* PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <config.h>
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#include <fcntl.h>
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#include <stdio.h>
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#include <errno.h>
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#include <stdlib.h>
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#include <string.h>
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#include <pwd.h>
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#include <stdbool.h>
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#include "subordinateio.h"
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#include "idmapping.h"
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#include "subid.h"
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const char *Prog = "(libsubid)";
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extern FILE * shadow_logfd;
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bool libsubid_init(const char *progname, FILE * logfd)
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{
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if (progname) {
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progname = strdup(progname);
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if (progname)
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Prog = progname;
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else
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fprintf(stderr, "Out of memory");
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}
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if (logfd) {
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shadow_logfd = logfd;
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return true;
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}
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shadow_logfd = fopen("/dev/null", "w");
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if (!shadow_logfd) {
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fprintf(stderr, "ERROR opening /dev/null for error messages. Using stderr.");
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shadow_logfd = stderr;
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return false;
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}
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return true;
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}
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static
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int get_subid_ranges(const char *owner, enum subid_type id_type, struct subordinate_range ***ranges)
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{
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return list_owner_ranges(owner, id_type, ranges);
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}
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int get_subuid_ranges(const char *owner, struct subordinate_range ***ranges)
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{
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return get_subid_ranges(owner, ID_TYPE_UID, ranges);
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}
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int get_subgid_ranges(const char *owner, struct subordinate_range ***ranges)
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{
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return get_subid_ranges(owner, ID_TYPE_GID, ranges);
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}
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void subid_free_ranges(struct subordinate_range **ranges, int count)
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{
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return free_subordinate_ranges(ranges, count);
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}
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static
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int get_subid_owner(unsigned long id, enum subid_type id_type, uid_t **owner)
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{
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return find_subid_owners(id, id_type, owner);
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}
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int get_subuid_owners(uid_t uid, uid_t **owner)
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{
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return get_subid_owner((unsigned long)uid, ID_TYPE_UID, owner);
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}
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int get_subgid_owners(gid_t gid, uid_t **owner)
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{
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return get_subid_owner((unsigned long)gid, ID_TYPE_GID, owner);
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}
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static
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bool grant_subid_range(struct subordinate_range *range, bool reuse,
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enum subid_type id_type)
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{
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return new_subid_range(range, id_type, reuse);
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}
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bool grant_subuid_range(struct subordinate_range *range, bool reuse)
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{
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return grant_subid_range(range, reuse, ID_TYPE_UID);
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}
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bool grant_subgid_range(struct subordinate_range *range, bool reuse)
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{
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return grant_subid_range(range, reuse, ID_TYPE_GID);
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}
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static
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bool ungrant_subid_range(struct subordinate_range *range, enum subid_type id_type)
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{
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return release_subid_range(range, id_type);
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}
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bool ungrant_subuid_range(struct subordinate_range *range)
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{
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return ungrant_subid_range(range, ID_TYPE_UID);
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}
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bool ungrant_subgid_range(struct subordinate_range *range)
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{
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return ungrant_subid_range(range, ID_TYPE_GID);
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}
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