| 1 | /* |
| 2 | * Copyright (C) 2012 - David Goulet <dgoulet@efficios.com> |
| 3 | * |
| 4 | * This program is free software; you can redistribute it and/or modify it |
| 5 | * under the terms of the GNU General Public License, version 2 only, as |
| 6 | * published by the Free Software Foundation. |
| 7 | * |
| 8 | * This program is distributed in the hope that it will be useful, but WITHOUT |
| 9 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 10 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for |
| 11 | * more details. |
| 12 | * |
| 13 | * You should have received a copy of the GNU General Public License along with |
| 14 | * this program; if not, write to the Free Software Foundation, Inc., 51 |
| 15 | * Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. |
| 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 <time.h> |
| 26 | #include <unistd.h> |
| 27 | |
| 28 | #include "../command.h" |
| 29 | #include "../utils.h" |
| 30 | |
| 31 | #include <common/defaults.h> |
| 32 | #include <common/sessiond-comm/sessiond-comm.h> |
| 33 | #include <common/uri.h> |
| 34 | |
| 35 | static int opt_kernel; |
| 36 | static int opt_userspace; |
| 37 | static char *opt_session_name; |
| 38 | |
| 39 | static struct lttng_handle *handle; |
| 40 | |
| 41 | enum { |
| 42 | OPT_HELP = 1, |
| 43 | OPT_LIST_OPTIONS, |
| 44 | }; |
| 45 | |
| 46 | static struct poptOption long_options[] = { |
| 47 | /* longName, shortName, argInfo, argPtr, value, descrip, argDesc */ |
| 48 | {"help", 'h', POPT_ARG_NONE, NULL, OPT_HELP, NULL, NULL}, |
| 49 | {"list-options", 0, POPT_ARG_NONE, NULL, OPT_LIST_OPTIONS, NULL, NULL}, |
| 50 | {"session", 's', POPT_ARG_STRING, &opt_session_name, 0, 0, 0}, |
| 51 | {"kernel", 'k', POPT_ARG_VAL, &opt_kernel, 1, 0, 0}, |
| 52 | {"userspace", 'u', POPT_ARG_VAL, &opt_userspace, 1, 0, 0}, |
| 53 | {0, 0, 0, 0, 0, 0, 0} |
| 54 | }; |
| 55 | |
| 56 | /* |
| 57 | * usage |
| 58 | */ |
| 59 | static void usage(FILE *ofp) |
| 60 | { |
| 61 | fprintf(ofp, "usage: lttng disable-consumer [-u|-k] [OPTIONS]\n"); |
| 62 | fprintf(ofp, "\n"); |
| 63 | fprintf(ofp, "Disable the consumer for a tracing session. This call can\n"); |
| 64 | fprintf(ofp, "be done BEFORE tracing has started.\n"); |
| 65 | fprintf(ofp, "\n"); |
| 66 | fprintf(ofp, "Options:\n"); |
| 67 | fprintf(ofp, " -h, --help Show this help\n"); |
| 68 | fprintf(ofp, " --list-options Simple listing of options\n"); |
| 69 | fprintf(ofp, " -s, --session NAME Apply to session name\n"); |
| 70 | fprintf(ofp, " -k, --kernel Apply to the kernel tracer\n"); |
| 71 | fprintf(ofp, " -u, --userspace Apply to the user-space tracer\n"); |
| 72 | fprintf(ofp, "\n"); |
| 73 | } |
| 74 | |
| 75 | /* |
| 76 | * Disable consumer command. |
| 77 | */ |
| 78 | static int disable_consumer(char *session_name) |
| 79 | { |
| 80 | int ret = CMD_SUCCESS; |
| 81 | struct lttng_domain dom; |
| 82 | |
| 83 | memset(&dom, 0, sizeof(dom)); |
| 84 | |
| 85 | /* Create lttng domain */ |
| 86 | if (opt_kernel) { |
| 87 | dom.type = LTTNG_DOMAIN_KERNEL; |
| 88 | } else if (opt_userspace) { |
| 89 | dom.type = LTTNG_DOMAIN_UST; |
| 90 | } else { |
| 91 | ERR("Please specify a tracer (-k/--kernel or -u/--userspace)"); |
| 92 | ret = CMD_ERROR; |
| 93 | goto error; |
| 94 | } |
| 95 | |
| 96 | handle = lttng_create_handle(session_name, &dom); |
| 97 | if (handle == NULL) { |
| 98 | ret = -1; |
| 99 | goto error; |
| 100 | } |
| 101 | |
| 102 | ret = lttng_disable_consumer(handle); |
| 103 | if (ret < 0) { |
| 104 | ERR("Disabling consumer for session %s: %s", session_name, |
| 105 | lttng_strerror(ret)); |
| 106 | goto error; |
| 107 | } |
| 108 | |
| 109 | MSG("Consumer disabled successfully"); |
| 110 | |
| 111 | error: |
| 112 | lttng_destroy_handle(handle); |
| 113 | return ret; |
| 114 | } |
| 115 | |
| 116 | /* |
| 117 | * The 'disable-consumer <options>' first level command |
| 118 | * |
| 119 | * Returns one of the CMD_* result constants. |
| 120 | */ |
| 121 | int cmd_disable_consumer(int argc, const char **argv) |
| 122 | { |
| 123 | int opt, ret = CMD_SUCCESS; |
| 124 | static poptContext pc; |
| 125 | char *session_name = NULL; |
| 126 | |
| 127 | pc = poptGetContext(NULL, argc, argv, long_options, 0); |
| 128 | poptReadDefaultConfig(pc, 0); |
| 129 | |
| 130 | while ((opt = poptGetNextOpt(pc)) != -1) { |
| 131 | switch (opt) { |
| 132 | case OPT_HELP: |
| 133 | usage(stdout); |
| 134 | goto end; |
| 135 | case OPT_LIST_OPTIONS: |
| 136 | list_cmd_options(stdout, long_options); |
| 137 | goto end; |
| 138 | default: |
| 139 | usage(stderr); |
| 140 | ret = CMD_UNDEFINED; |
| 141 | goto end; |
| 142 | } |
| 143 | } |
| 144 | |
| 145 | /* Get session name */ |
| 146 | if (!opt_session_name) { |
| 147 | session_name = get_session_name(); |
| 148 | if (session_name == NULL) { |
| 149 | ret = CMD_ERROR; |
| 150 | goto end; |
| 151 | } |
| 152 | } else { |
| 153 | session_name = opt_session_name; |
| 154 | } |
| 155 | |
| 156 | ret = disable_consumer(session_name); |
| 157 | |
| 158 | end: |
| 159 | if (opt_session_name == NULL) { |
| 160 | free(session_name); |
| 161 | } |
| 162 | |
| 163 | poptFreeContext(pc); |
| 164 | return ret; |
| 165 | } |