1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * Copyright (C) 2009, 2010 Red Hat Inc, Steven Rostedt <srostedt@redhat.com>
4 *
5 */
6 #define _LARGEFILE64_SOURCE
7 #include <dirent.h>
8 #include <stdio.h>
9 #include <stdlib.h>
10 #include <string.h>
11 #include <getopt.h>
12 #include <stdarg.h>
13 #include <sys/types.h>
14 #include <sys/stat.h>
15 #include <sys/wait.h>
16 #include <sys/mman.h>
17 #include <fcntl.h>
18 #include <signal.h>
19 #include <unistd.h>
20 #include <ctype.h>
21 #include <errno.h>
22
23 #include "trace-local.h"
24
create_output(const char * file,const char * tracing_dir,const char * kallsyms)25 static struct tracecmd_output *create_output(const char *file,
26 const char *tracing_dir, const char *kallsyms)
27 {
28 struct tracecmd_output *out;
29
30 out = tracecmd_output_create(file);
31 if (!out)
32 goto error;
33
34 if (tracing_dir && tracecmd_output_set_trace_dir(out, tracing_dir))
35 goto error;
36 if (kallsyms && tracecmd_output_set_kallsyms(out, kallsyms))
37 goto error;
38 if (tracecmd_output_write_headers(out, NULL))
39 goto error;
40 return out;
41 error:
42 if (out)
43 tracecmd_output_close(out);
44 unlink(file);
45 return NULL;
46 }
47
trace_restore(int argc,char ** argv)48 void trace_restore (int argc, char **argv)
49 {
50 struct tracecmd_output *handle;
51 const char *output_file = DEFAULT_INPUT_FILE;
52 const char *output = NULL;
53 const char *input = NULL;
54 const char *tracing_dir = NULL;
55 const char *kallsyms = NULL;
56 struct stat st1;
57 struct stat st2;
58 int first_arg;
59 int create_only = 0;
60 int args;
61 int c;
62
63 if (argc < 2)
64 usage(argv);
65
66 if (strcmp(argv[1], "restore") != 0)
67 usage(argv);
68
69 while ((c = getopt(argc-1, argv+1, "+hco:i:t:k:")) >= 0) {
70 switch (c) {
71 case 'h':
72 usage(argv);
73 break;
74 case 'c':
75 if (input)
76 die("-c and -i are incompatible");
77 create_only = 1;
78 /* make output default to partial */
79 output_file = "trace-partial.dat";
80 break;
81
82 case 't':
83 tracing_dir = optarg;
84 break;
85 case 'k':
86 kallsyms = optarg;
87 break;
88 case 'o':
89 if (output)
90 die("only one output file allowed");
91 output = optarg;
92 break;
93
94 case 'i':
95 if (input)
96 die("only one input file allowed");
97 if (create_only)
98 die("-c and -i are incompatible");
99 input = optarg;
100 break;
101
102 default:
103 usage(argv);
104 }
105 }
106
107 if (!output)
108 output = output_file;
109
110 if ((argc - optind) <= 1) {
111 if (!create_only) {
112 warning("No data files found");
113 usage(argv);
114 }
115
116 handle = create_output(output, tracing_dir, kallsyms);
117 if (!handle)
118 die("Unabled to create output file %s", output);
119 if (tracecmd_write_cmdlines(handle) < 0)
120 die("Failed to write command lines");
121 tracecmd_output_close(handle);
122 exit(0);
123 }
124 first_arg = optind + 1;
125 args = argc - first_arg;
126 printf("first = %d %s args=%d\n", first_arg, argv[first_arg], args);
127
128 /* Make sure input and output are not the same file */
129 if (input && output) {
130 if (stat(input, &st1) < 0)
131 die("%s:", input);
132 /* output exists? otherwise we don't care */
133 if (stat(output, &st2) == 0) {
134 if (st1.st_ino == st2.st_ino &&
135 st1.st_dev == st2.st_dev)
136 die("input and output file are the same");
137 }
138 }
139
140 if (input) {
141 struct tracecmd_input *ihandle;
142
143 ihandle = tracecmd_alloc(input, 0);
144 if (!ihandle)
145 die("error reading file %s", input);
146 /* make sure headers are ok */
147 if (tracecmd_read_headers(ihandle, TRACECMD_FILE_CMD_LINES) < 0)
148 die("error reading file %s headers", input);
149
150 handle = tracecmd_copy(ihandle, output, TRACECMD_FILE_CMD_LINES, 0, NULL);
151 tracecmd_close(ihandle);
152 } else {
153 handle = tracecmd_output_create(output);
154 tracecmd_output_write_headers(handle, NULL);
155 }
156
157 if (!handle)
158 die("error writing to %s", output);
159
160 if (tracecmd_append_cpu_data(handle, args, &argv[first_arg]) < 0)
161 die("failed to append data");
162
163 return;
164 }
165