12 static bool check_pipe(struct perf_data_file *file)  in check_pipe()  argument
16 	int fd = perf_data_file__is_read(file) ?  in check_pipe()
19 	if (!file->path) {  in check_pipe()
23 		if (!strcmp(file->path, "-"))  in check_pipe()
28 		file->fd = fd;  in check_pipe()
30 	return file->is_pipe = is_pipe;  in check_pipe()
33 static int check_backup(struct perf_data_file *file)  in check_backup()  argument
37 	if (!stat(file->path, &st) && st.st_size) {  in check_backup()
41 			 file->path);  in check_backup()
43 		rename(file->path, oldname);  in check_backup()
49 static int open_file_read(struct perf_data_file *file)  in open_file_read()  argument
55 	fd = open(file->path, O_RDONLY);  in open_file_read()
59 		pr_err("failed to open %s: %s", file->path,  in open_file_read()
61 		if (err == ENOENT && !strcmp(file->path, "perf.data"))  in open_file_read()
70 	if (!file->force && st.st_uid && (st.st_uid != geteuid())) {  in open_file_read()
72 		       file->path);  in open_file_read()
78 			file->path);  in open_file_read()
82 	file->size = st.st_size;  in open_file_read()
90 static int open_file_write(struct perf_data_file *file)  in open_file_write()  argument
95 	if (check_backup(file))  in open_file_write()
98 	fd = open(file->path, O_CREAT|O_RDWR|O_TRUNC, S_IRUSR|S_IWUSR);  in open_file_write()
101 		pr_err("failed to open %s : %s\n", file->path,  in open_file_write()
107 static int open_file(struct perf_data_file *file)  in open_file()  argument
111 	fd = perf_data_file__is_read(file) ?  in open_file()
112 	     open_file_read(file) : open_file_write(file);  in open_file()
114 	file->fd = fd;  in open_file()
118 int perf_data_file__open(struct perf_data_file *file)  in perf_data_file__open()  argument
120 	if (check_pipe(file))  in perf_data_file__open()
123 	if (!file->path)  in perf_data_file__open()
124 		file->path = "perf.data";  in perf_data_file__open()
126 	return open_file(file);  in perf_data_file__open()
129 void perf_data_file__close(struct perf_data_file *file)  in perf_data_file__close()  argument
131 	close(file->fd);  in perf_data_file__close()
134 ssize_t perf_data_file__write(struct perf_data_file *file,  in perf_data_file__write()  argument
137 	return writen(file->fd, buf, size);  in perf_data_file__write()