| 1 | /* Copyright (C) 2009 Pierre-Marc Fournier |
| 2 | * |
| 3 | * This library is free software; you can redistribute it and/or |
| 4 | * modify it under the terms of the GNU Lesser General Public |
| 5 | * License as published by the Free Software Foundation; either |
| 6 | * version 2.1 of the License, or (at your option) any later version. |
| 7 | * |
| 8 | * This library 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 GNU |
| 11 | * Lesser General Public License for more details. |
| 12 | * |
| 13 | * You should have received a copy of the GNU Lesser General Public |
| 14 | * License along with this library; if not, write to the Free Software |
| 15 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| 16 | */ |
| 17 | |
| 18 | #define _GNU_SOURCE |
| 19 | #include <stdio.h> |
| 20 | #include <unistd.h> |
| 21 | #include <getopt.h> |
| 22 | #include <stdlib.h> |
| 23 | #include <fcntl.h> |
| 24 | |
| 25 | #include "ustcomm.h" |
| 26 | |
| 27 | struct ust_opts { |
| 28 | char *cmd; |
| 29 | pid_t *pids; |
| 30 | int take_reply; |
| 31 | }; |
| 32 | |
| 33 | char *progname = NULL; |
| 34 | |
| 35 | void usage(void) |
| 36 | { |
| 37 | fprintf(stderr, "usage: %s [OPTIONS] COMMAND PID...\n", progname); |
| 38 | fprintf(stderr, "\nControl the tracing of a process that supports LTTng Userspace Tracing.\n\ |
| 39 | \n\ |
| 40 | Commands:\n\ |
| 41 | --start-trace\t\t\tStart tracing\n\ |
| 42 | --stop-trace\t\t\tStop tracing\n\ |
| 43 | --destroy-trace\t\t\tDestroy the trace\n\ |
| 44 | --enable-marker CHANNEL/MARKER\tEnable a marker\n\ |
| 45 | --disable-marker CHANNEL/MARKER\tDisable a marker\n\ |
| 46 | --list-markers\tList the markers of the process and their state\n\ |
| 47 | \n\ |
| 48 | "); |
| 49 | } |
| 50 | |
| 51 | int parse_opts_long(int argc, char **argv, struct ust_opts *opts) |
| 52 | { |
| 53 | int c; |
| 54 | |
| 55 | opts->cmd = NULL; |
| 56 | opts->pids = NULL; |
| 57 | opts->take_reply = 0; |
| 58 | |
| 59 | while (1) { |
| 60 | int option_index = 0; |
| 61 | static struct option long_options[] = { |
| 62 | {"start-trace", 0, 0, 1000}, |
| 63 | {"stop-trace", 0, 0, 1001}, |
| 64 | {"destroy-trace", 0, 0, 1002}, |
| 65 | {"list-markers", 0, 0, 1004}, |
| 66 | {"print-markers", 0, 0, 1005}, |
| 67 | {"pid", 1, 0, 1006}, |
| 68 | {"enable-marker", 1, 0, 1007}, |
| 69 | {"disable-marker", 1, 0, 1008}, |
| 70 | {"start", 0, 0, 1009}, |
| 71 | {"help", 0, 0, 'h'}, |
| 72 | {"version", 0, 0, 1010}, |
| 73 | {0, 0, 0, 0} |
| 74 | }; |
| 75 | |
| 76 | c = getopt_long(argc, argv, "h", long_options, &option_index); |
| 77 | if (c == -1) |
| 78 | break; |
| 79 | |
| 80 | switch (c) { |
| 81 | case 0: |
| 82 | printf("option %s", long_options[option_index].name); |
| 83 | if (optarg) |
| 84 | printf(" with arg %s", optarg); |
| 85 | printf("\n"); |
| 86 | break; |
| 87 | |
| 88 | case 1000: |
| 89 | opts->cmd = strdup("trace_start"); |
| 90 | break; |
| 91 | case 1001: |
| 92 | opts->cmd = strdup("trace_stop"); |
| 93 | break; |
| 94 | case 1009: |
| 95 | opts->cmd = strdup("start"); |
| 96 | break; |
| 97 | case 1002: |
| 98 | opts->cmd = strdup("trace_destroy"); |
| 99 | break; |
| 100 | case 1004: |
| 101 | opts->cmd = strdup("list_markers"); |
| 102 | opts->take_reply = 1; |
| 103 | break; |
| 104 | case 1007: |
| 105 | asprintf(&opts->cmd, "enable_marker %s", optarg); |
| 106 | break; |
| 107 | case 1008: |
| 108 | asprintf(&opts->cmd, "disable_marker %s", optarg); |
| 109 | break; |
| 110 | case 'h': |
| 111 | usage(); |
| 112 | exit(0); |
| 113 | case 1010: |
| 114 | printf("Version 0\n"); |
| 115 | |
| 116 | default: |
| 117 | /* unknown option or other error; error is printed by getopt, just return */ |
| 118 | return 1; |
| 119 | } |
| 120 | } |
| 121 | |
| 122 | if(argc - optind > 0) { |
| 123 | int i; |
| 124 | int pididx=0; |
| 125 | opts->pids = malloc((argc-optind+1) * sizeof(pid_t)); |
| 126 | |
| 127 | for(i=optind; i<argc; i++) { |
| 128 | opts->pids[pididx++] = atoi(argv[i]); |
| 129 | } |
| 130 | opts->pids[pididx] = -1; |
| 131 | } |
| 132 | |
| 133 | return 0; |
| 134 | } |
| 135 | |
| 136 | int main(int argc, char *argv[]) |
| 137 | { |
| 138 | pid_t *pidit; |
| 139 | //char *msg = argv[2]; |
| 140 | struct ustcomm_connection conn; |
| 141 | int result; |
| 142 | struct ust_opts opts; |
| 143 | |
| 144 | progname = argv[0]; |
| 145 | |
| 146 | if(argc <= 1) { |
| 147 | fprintf(stderr, "No operation specified.\n"); |
| 148 | usage(); |
| 149 | exit(EXIT_FAILURE); |
| 150 | } |
| 151 | |
| 152 | result = parse_opts_long(argc, argv, &opts); |
| 153 | if(result) { |
| 154 | usage(); |
| 155 | exit(EXIT_FAILURE); |
| 156 | } |
| 157 | |
| 158 | if(opts.pids == NULL) { |
| 159 | fprintf(stderr, "No pid specified.\n"); |
| 160 | usage(); |
| 161 | exit(EXIT_FAILURE); |
| 162 | } |
| 163 | if(opts.cmd == NULL) { |
| 164 | fprintf(stderr, "No command specified.\n"); |
| 165 | usage(); |
| 166 | exit(EXIT_FAILURE); |
| 167 | } |
| 168 | |
| 169 | pidit = opts.pids; |
| 170 | |
| 171 | while(*pidit != -1) { |
| 172 | char *reply; |
| 173 | char **preply; |
| 174 | |
| 175 | if(opts.take_reply) |
| 176 | preply = &reply; |
| 177 | else |
| 178 | preply = NULL; |
| 179 | |
| 180 | result = ustcomm_connect_app(*pidit, &conn); |
| 181 | if(result) { |
| 182 | fprintf(stderr, "error connecting to process\n"); |
| 183 | exit(EXIT_FAILURE); |
| 184 | } |
| 185 | ustcomm_send_request(&conn, opts.cmd, preply); |
| 186 | |
| 187 | if(opts.take_reply) |
| 188 | printf("%s", reply); |
| 189 | pidit++; |
| 190 | } |
| 191 | |
| 192 | free(opts.pids); |
| 193 | free(opts.cmd); |
| 194 | |
| 195 | return 0; |
| 196 | } |