1 | /* An example program that demonstrates libtrace's output functionalities. |
---|
2 | * |
---|
3 | * This libtrace skeleton has the bare minimum required to write a useful |
---|
4 | * libtrace output program, including error handling. |
---|
5 | * |
---|
6 | */ |
---|
7 | #include "libtrace.h" |
---|
8 | #include <stdio.h> |
---|
9 | |
---|
10 | void per_packet(libtrace_packet_t *packet) |
---|
11 | { |
---|
12 | /* Your code goes here */ |
---|
13 | } |
---|
14 | |
---|
15 | int main(int argc, char *argv[]) |
---|
16 | { |
---|
17 | libtrace_t *trace; |
---|
18 | libtrace_out_t *output; |
---|
19 | libtrace_packet_t *packet; |
---|
20 | int compress_level = 6; |
---|
21 | |
---|
22 | if (argc<3) { |
---|
23 | fprintf(stderr,"usage: %s <input uri> <outputuri>\n",argv[0]); |
---|
24 | return 1; |
---|
25 | } |
---|
26 | |
---|
27 | trace = trace_create(argv[1]); |
---|
28 | |
---|
29 | if (trace_is_err(trace)) { |
---|
30 | trace_perror(trace,"Opening input trace"); |
---|
31 | return 1; |
---|
32 | } |
---|
33 | |
---|
34 | if (trace_start(trace)) { |
---|
35 | trace_perror(trace,"Starting input trace"); |
---|
36 | trace_destroy(trace); |
---|
37 | return 1; |
---|
38 | } |
---|
39 | |
---|
40 | /* Creating output trace */ |
---|
41 | output = trace_create_output(argv[2]); |
---|
42 | |
---|
43 | if (trace_is_err_output(output)) { |
---|
44 | trace_perror_output(output, "Opening output trace"); |
---|
45 | return 1; |
---|
46 | } |
---|
47 | |
---|
48 | /* Setting compression level */ |
---|
49 | if (trace_config_output(output, TRACE_OPTION_OUTPUT_COMPRESS, |
---|
50 | &compress_level) == -1) { |
---|
51 | trace_perror_output(output, "Setting compression level"); |
---|
52 | trace_destroy(trace); |
---|
53 | trace_destroy_output(output); |
---|
54 | return 1; |
---|
55 | } |
---|
56 | |
---|
57 | if (trace_start_output(output)) { |
---|
58 | trace_perror_output(output, "Starting output trace"); |
---|
59 | trace_destroy_output(output); |
---|
60 | trace_destroy(trace); |
---|
61 | return 1; |
---|
62 | } |
---|
63 | |
---|
64 | packet = trace_create_packet(); |
---|
65 | |
---|
66 | while (trace_read_packet(trace,packet)>0) { |
---|
67 | /* Perhaps we want to do something to the packet first */ |
---|
68 | per_packet(packet); |
---|
69 | |
---|
70 | /* Write out the packet */ |
---|
71 | if (trace_write_packet(output, packet) < 0) { |
---|
72 | trace_perror_output(output, "Writing packet"); |
---|
73 | trace_destroy(trace); |
---|
74 | trace_destroy_output(output); |
---|
75 | trace_destroy_packet(packet); |
---|
76 | return 1; |
---|
77 | } |
---|
78 | |
---|
79 | } |
---|
80 | |
---|
81 | |
---|
82 | if (trace_is_err(trace)) { |
---|
83 | trace_perror(trace,"Reading packets"); |
---|
84 | trace_destroy(trace); |
---|
85 | trace_destroy_output(output); |
---|
86 | trace_destroy_packet(packet); |
---|
87 | return 1; |
---|
88 | } |
---|
89 | |
---|
90 | trace_destroy(trace); |
---|
91 | trace_destroy_output(output); |
---|
92 | trace_destroy_packet(packet); |
---|
93 | |
---|
94 | return 0; |
---|
95 | } |
---|