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f3ed775e DG |
1 | /* |
2 | * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca> | |
3 | * | |
d14d33bf AM |
4 | * This program is free software; you can redistribute it and/or modify |
5 | * it under the terms of the GNU General Public License, version 2 only, | |
6 | * as published by the Free Software Foundation. | |
f3ed775e DG |
7 | * |
8 | * This program is distributed in the hope that it will be useful, | |
9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
11 | * GNU General Public License for more details. | |
12 | * | |
d14d33bf AM |
13 | * You should have received a copy of the GNU General Public License along |
14 | * with this program; if not, write to the Free Software Foundation, Inc., | |
15 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. | |
f3ed775e DG |
16 | */ |
17 | ||
18 | #define _GNU_SOURCE | |
19 | #include <popt.h> | |
20 | #include <stdio.h> | |
21 | #include <stdlib.h> | |
22 | #include <string.h> | |
23 | #include <sys/stat.h> | |
24 | #include <sys/types.h> | |
25 | #include <unistd.h> | |
26 | ||
c399183f | 27 | #include "../command.h" |
f3ed775e | 28 | |
42224349 DG |
29 | #include <common/sessiond-comm/sessiond-comm.h> |
30 | ||
f3ed775e DG |
31 | static char *opt_session_name; |
32 | ||
33 | enum { | |
34 | OPT_HELP = 1, | |
679b4943 | 35 | OPT_LIST_OPTIONS, |
f3ed775e DG |
36 | }; |
37 | ||
38 | static struct poptOption long_options[] = { | |
39 | /* longName, shortName, argInfo, argPtr, value, descrip, argDesc */ | |
40 | {"help", 'h', POPT_ARG_NONE, 0, OPT_HELP, 0, 0}, | |
679b4943 | 41 | {"list-options", 0, POPT_ARG_NONE, NULL, OPT_LIST_OPTIONS, NULL, NULL}, |
f3ed775e DG |
42 | {0, 0, 0, 0, 0, 0, 0} |
43 | }; | |
44 | ||
45 | /* | |
46 | * usage | |
47 | */ | |
48 | static void usage(FILE *ofp) | |
49 | { | |
50 | fprintf(ofp, "usage: lttng start [options] [NAME]\n"); | |
51 | fprintf(ofp, "\n"); | |
52 | fprintf(ofp, "Where NAME is an optional session name. If not specified, lttng will\n"); | |
53 | fprintf(ofp, "get it from the configuration directory (.lttng).\n"); | |
54 | fprintf(ofp, "\n"); | |
55 | fprintf(ofp, " -h, --help Show this help\n"); | |
679b4943 | 56 | fprintf(ofp, " --list-options Simple listing of options\n"); |
f3ed775e DG |
57 | fprintf(ofp, "\n"); |
58 | } | |
59 | ||
60 | /* | |
61 | * start_tracing | |
62 | * | |
63 | * Start tracing for all trace of the session. | |
64 | */ | |
65 | static int start_tracing(void) | |
66 | { | |
ae856491 | 67 | int ret; |
f3ed775e DG |
68 | char *session_name; |
69 | ||
70 | if (opt_session_name == NULL) { | |
71 | session_name = get_session_name(); | |
72 | if (session_name == NULL) { | |
73 | ret = CMD_ERROR; | |
74 | goto error; | |
75 | } | |
76 | } else { | |
77 | session_name = opt_session_name; | |
78 | } | |
79 | ||
80 | DBG("Starting tracing for session %s", session_name); | |
81 | ||
6a4f824d | 82 | ret = lttng_start_tracing(session_name); |
f3ed775e | 83 | if (ret < 0) { |
42224349 DG |
84 | switch (-ret) { |
85 | case LTTCOMM_TRACE_ALREADY_STARTED: | |
86 | WARN("Tracing already started for session %s", session_name); | |
87 | break; | |
88 | default: | |
89 | ERR("%s", lttng_strerror(ret)); | |
90 | break; | |
91 | } | |
f3ed775e DG |
92 | goto free_name; |
93 | } | |
94 | ||
ae856491 DG |
95 | ret = CMD_SUCCESS; |
96 | ||
f3ed775e DG |
97 | MSG("Tracing started for session %s", session_name); |
98 | ||
99 | free_name: | |
b73d0b29 MD |
100 | if (opt_session_name == NULL) { |
101 | free(session_name); | |
102 | } | |
f3ed775e DG |
103 | error: |
104 | return ret; | |
105 | } | |
106 | ||
107 | /* | |
108 | * cmd_start | |
109 | * | |
110 | * The 'start <options>' first level command | |
111 | */ | |
112 | int cmd_start(int argc, const char **argv) | |
113 | { | |
ca1c3607 | 114 | int opt, ret = CMD_SUCCESS; |
f3ed775e DG |
115 | static poptContext pc; |
116 | ||
117 | pc = poptGetContext(NULL, argc, argv, long_options, 0); | |
118 | poptReadDefaultConfig(pc, 0); | |
119 | ||
120 | while ((opt = poptGetNextOpt(pc)) != -1) { | |
121 | switch (opt) { | |
122 | case OPT_HELP: | |
ca1c3607 | 123 | usage(stdout); |
f3ed775e | 124 | goto end; |
679b4943 SM |
125 | case OPT_LIST_OPTIONS: |
126 | list_cmd_options(stdout, long_options); | |
679b4943 | 127 | goto end; |
f3ed775e DG |
128 | default: |
129 | usage(stderr); | |
130 | ret = CMD_UNDEFINED; | |
131 | goto end; | |
132 | } | |
133 | } | |
134 | ||
135 | opt_session_name = (char*) poptGetArg(pc); | |
136 | ||
137 | ret = start_tracing(); | |
138 | ||
139 | end: | |
ca1c3607 | 140 | poptFreeContext(pc); |
f3ed775e DG |
141 | return ret; |
142 | } |