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// SPDX-License-Identifier: GPL-2.0
#include "tracepoint.h"
#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/param.h>
#include <unistd.h>
#include <api/fs/tracing_path.h>
#include "fncache.h"
int tp_event_has_id(const char *dir_path, struct dirent *evt_dir)
{
char evt_path[MAXPATHLEN];
int fd;
snprintf(evt_path, MAXPATHLEN, "%s/%s/id", dir_path, evt_dir->d_name);
fd = open(evt_path, O_RDONLY);
if (fd < 0)
return -EINVAL;
close(fd);
return 0;
}
/*
* Check whether event is in <debugfs_mount_point>/tracing/events
*/
bool is_valid_tracepoint(const char *event_string)
{
char *dst, *path = malloc(strlen(event_string) + 4); /* Space for "/id\0". */
bool have_file = false; /* Conservatively return false if memory allocation failed. */
const char *src;
if (!path)
return false;
/* Copy event_string replacing the ':' with '/'. */
for (src = event_string, dst = path; *src; src++, dst++)
*dst = (*src == ':') ? '/' : *src;
/* Add "/id\0". */
memcpy(dst, "/id", 4);
dst = get_events_file(path);
if (dst)
have_file = file_available(dst);
free(dst);
free(path);
return have_file;
}
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