X-Git-Url: http://git.liburcu.org/?p=lttng-ust.git;a=blobdiff_plain;f=liblttng-ust%2Flttng-context-vsgid.c;h=437b01e49afb04396a5d1ec106b67ecb3beff330;hp=45fd28603aa9060a0f44ecbc0194fdb9a6c57381;hb=HEAD;hpb=218deb69baab57ee2f6728eef18e84697f21197b

diff --git a/liblttng-ust/lttng-context-vsgid.c b/liblttng-ust/lttng-context-vsgid.c
deleted file mode 100644
index 45fd2860..00000000
--- a/liblttng-ust/lttng-context-vsgid.c
+++ /dev/null
@@ -1,133 +0,0 @@
-/*
- * lttng-context-vsgid.c
- *
- * LTTng UST namespaced saved set-group ID context.
- *
- * Copyright (C) 2009-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
- *               2019 Michael Jeanson <mjeanson@efficios.com>
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; only
- * version 2.1 of the License.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
- */
-
-#define _GNU_SOURCE
-#define _LGPL_SOURCE
-#include <stddef.h>
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <unistd.h>
-#include <lttng/ust-events.h>
-#include <lttng/ust-tracer.h>
-#include <lttng/ringbuffer-config.h>
-#include "creds.h"
-
-
-/*
- * At the kernel level, user IDs and group IDs are a per-thread attribute.
- * However, POSIX requires that all threads in a process share the same
- * credentials. The NPTL threading implementation handles the POSIX
- * requirements by providing wrapper functions for the various system calls
- * that change process UIDs and GIDs. These wrapper functions (including those
- * for setreuid() and setregid()) employ a signal-based technique to ensure
- * that when one thread changes credentials, all of the other threads in the
- * process also change their credentials.
- */
-
-/*
- * We cache the result to ensure we don't trigger a system call for
- * each event. User / group IDs are global to the process.
- */
-static gid_t cached_vsgid = INVALID_GID;
-
-static
-gid_t get_vsgid(void)
-{
-	gid_t vsgid;
-
-	vsgid = CMM_LOAD_SHARED(cached_vsgid);
-
-	if (caa_unlikely(vsgid == INVALID_GID)) {
-		gid_t gid, egid, sgid;
-
-		if (getresgid(&gid, &egid, &sgid) == 0) {
-			vsgid = sgid;
-			CMM_STORE_SHARED(cached_vsgid, vsgid);
-		}
-	}
-
-	return vsgid;
-}
-
-/*
- * The vsgid can change on setuid, setreuid and setresuid.
- */
-void lttng_context_vsgid_reset(void)
-{
-	CMM_STORE_SHARED(cached_vsgid, INVALID_GID);
-}
-
-static
-size_t vsgid_get_size(struct lttng_ctx_field *field, size_t offset)
-{
-	size_t size = 0;
-
-	size += lib_ring_buffer_align(offset, lttng_alignof(gid_t));
-	size += sizeof(gid_t);
-	return size;
-}
-
-static
-void vsgid_record(struct lttng_ctx_field *field,
-		 struct lttng_ust_lib_ring_buffer_ctx *ctx,
-		 struct lttng_channel *chan)
-{
-	gid_t vsgid;
-
-	vsgid = get_vsgid();
-	lib_ring_buffer_align_ctx(ctx, lttng_alignof(vsgid));
-	chan->ops->event_write(ctx, &vsgid, sizeof(vsgid));
-}
-
-static
-void vsgid_get_value(struct lttng_ctx_field *field,
-		struct lttng_ctx_value *value)
-{
-	value->u.s64 = get_vsgid();
-}
-
-int lttng_add_vsgid_to_ctx(struct lttng_ctx **ctx)
-{
-	struct lttng_ctx_field *field;
-
-	field = lttng_append_context(ctx);
-	if (!field)
-		return -ENOMEM;
-	if (lttng_find_context(*ctx, "vsgid")) {
-		lttng_remove_context_field(ctx, field);
-		return -EEXIST;
-	}
-	field->event_field.name = "vsgid";
-	field->event_field.type.atype = atype_integer;
-	field->event_field.type.u.integer.size = sizeof(gid_t) * CHAR_BIT;
-	field->event_field.type.u.integer.alignment = lttng_alignof(gid_t) * CHAR_BIT;
-	field->event_field.type.u.integer.signedness = lttng_is_signed_type(gid_t);
-	field->event_field.type.u.integer.reverse_byte_order = 0;
-	field->event_field.type.u.integer.base = 10;
-	field->event_field.type.u.integer.encoding = lttng_encode_none;
-	field->get_size = vsgid_get_size;
-	field->record = vsgid_record;
-	field->get_value = vsgid_get_value;
-	lttng_context_update(*ctx);
-	return 0;
-}