X-Git-Url: http://git.liburcu.org/?a=blobdiff_plain;f=liblttng-ust%2Flttng-context-vsgid.c;fp=liblttng-ust%2Flttng-context-vsgid.c;h=0000000000000000000000000000000000000000;hb=9d4c8b2d907edb9ebc9bfde55602598e7ba0832e;hp=92785420e9d5c1cd30c545603d4db89deb99d21e;hpb=6ba6fd60507f8e045bdc4f1be14e9d99c6a15f7f;p=lttng-ust.git

diff --git a/liblttng-ust/lttng-context-vsgid.c b/liblttng-ust/lttng-context-vsgid.c
deleted file mode 100644
index 92785420..00000000
--- a/liblttng-ust/lttng-context-vsgid.c
+++ /dev/null
@@ -1,124 +0,0 @@
-/*
- * SPDX-License-Identifier: LGPL-2.1-only
- *
- * Copyright (C) 2009-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
- * Copyright (C) 2019 Michael Jeanson <mjeanson@efficios.com>
- *
- * LTTng UST namespaced saved set-group ID context.
- */
-
-#define _LGPL_SOURCE
-#include <limits.h>
-#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-context.h>
-
-#include "context-internal.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(void *priv __attribute__((unused)),
-		size_t offset)
-{
-	size_t size = 0;
-
-	size += lttng_ust_lib_ring_buffer_align(offset, lttng_ust_rb_alignof(gid_t));
-	size += sizeof(gid_t);
-	return size;
-}
-
-static
-void vsgid_record(void *priv __attribute__((unused)),
-		 struct lttng_ust_lib_ring_buffer_ctx *ctx,
-		 struct lttng_ust_channel_buffer *chan)
-{
-	gid_t vsgid;
-
-	vsgid = get_vsgid();
-	chan->ops->event_write(ctx, &vsgid, sizeof(vsgid), lttng_ust_rb_alignof(vsgid));
-}
-
-static
-void vsgid_get_value(void *priv __attribute__((unused)),
-		struct lttng_ust_ctx_value *value)
-{
-	value->u.s64 = get_vsgid();
-}
-
-static const struct lttng_ust_ctx_field *ctx_field = lttng_ust_static_ctx_field(
-	lttng_ust_static_event_field("vsgid",
-		lttng_ust_static_type_integer(sizeof(gid_t) * CHAR_BIT,
-				lttng_ust_rb_alignof(gid_t) * CHAR_BIT,
-				lttng_ust_is_signed_type(gid_t),
-				BYTE_ORDER, 10),
-		false, false),
-	vsgid_get_size,
-	vsgid_record,
-	vsgid_get_value,
-	NULL, NULL);
-
-int lttng_add_vsgid_to_ctx(struct lttng_ust_ctx **ctx)
-{
-	int ret;
-
-	if (lttng_find_context(*ctx, ctx_field->event_field->name)) {
-		ret = -EEXIST;
-		goto error_find_context;
-	}
-	ret = lttng_ust_context_append(ctx, ctx_field);
-	if (ret)
-		return ret;
-	return 0;
-
-error_find_context:
-	return ret;
-}