Fix: check errors in lttng command argument values
[lttng-tools.git] / src / bin / lttng / commands / enable_channels.c
index f53a941a297358443bda9e18adf68d7de879ba86..52917cdad56e6289e0b99608dacd549b3441386b 100644 (file)
@@ -28,6 +28,7 @@
 #include "../command.h"
 
 #include <src/common/sessiond-comm/sessiond-comm.h>
+#include <src/common/utils.h>
 
 static char *opt_channels;
 static int opt_kernel;
@@ -66,7 +67,7 @@ static struct poptOption long_options[] = {
        {"userspace",      'u', POPT_ARG_NONE, 0, OPT_USERSPACE, 0, 0},
        {"discard",        0,   POPT_ARG_NONE, 0, OPT_DISCARD, 0, 0},
        {"overwrite",      0,   POPT_ARG_NONE, 0, OPT_OVERWRITE, 0, 0},
-       {"subbuf-size",    0,   POPT_ARG_DOUBLE, 0, OPT_SUBBUF_SIZE, 0, 0},
+       {"subbuf-size",    0,   POPT_ARG_STRING, 0, OPT_SUBBUF_SIZE, 0, 0},
        {"num-subbuf",     0,   POPT_ARG_INT, 0, OPT_NUM_SUBBUF, 0, 0},
        {"switch-timer",   0,   POPT_ARG_INT, 0, OPT_SWITCH_TIMER, 0, 0},
        {"read-timer",     0,   POPT_ARG_INT, 0, OPT_READ_TIMER, 0, 0},
@@ -99,7 +100,7 @@ static void usage(FILE *ofp)
                DEFAULT_CHANNEL_OVERWRITE ? "" : " (default)");
        fprintf(ofp, "      --overwrite          Flight recorder mode%s\n",
                DEFAULT_CHANNEL_OVERWRITE ? " (default)" : "");
-       fprintf(ofp, "      --subbuf-size SIZE   Subbuffer size in bytes\n");
+       fprintf(ofp, "      --subbuf-size SIZE   Subbuffer size in bytes {+k,+M,+G}\n");
        fprintf(ofp, "                               (default: %zu, kernel default: %zu)\n",
                default_get_channel_subbuf_size(),
                default_get_kernel_channel_subbuf_size());
@@ -112,15 +113,15 @@ static void usage(FILE *ofp)
         fprintf(ofp, "                               kernel and ust tracers\n");
        fprintf(ofp, "      --switch-timer USEC  Switch timer interval in usec (default: %u)\n",
                DEFAULT_CHANNEL_SWITCH_TIMER);
-       fprintf(ofp, "      --read-timer USEC    Read timer interval in usec (default: %u)\n",
-               DEFAULT_CHANNEL_READ_TIMER);
+       fprintf(ofp, "      --read-timer USEC    Read timer interval in usec (UST default: %u, kernel default: %u)\n",
+               DEFAULT_UST_CHANNEL_READ_TIMER, DEFAULT_KERNEL_CHANNEL_READ_TIMER);
        fprintf(ofp, "      --output TYPE        Channel output type (Values: %s, %s)\n",
                        output_mmap, output_splice);
        fprintf(ofp, "      --buffers-uid        Use per UID buffer (-u only)\n");
        fprintf(ofp, "      --buffers-pid        Use per PID buffer (-u only)\n");
        fprintf(ofp, "      --buffers-global     Use shared buffer for the whole system (-k only)\n");
        fprintf(ofp, "  -C, --tracefile-size SIZE\n");
-       fprintf(ofp, "                           Maximum size of of each tracefile within a stream (in bytes).\n");
+       fprintf(ofp, "                           Maximum size of each tracefile within a stream (in bytes).\n");
        fprintf(ofp, "  -W, --tracefile-count COUNT\n");
        fprintf(ofp, "                           Used in conjunction with -C option, this will limit the number\n");
        fprintf(ofp, "                           of files created to the specified count.\n");
@@ -299,6 +300,7 @@ int cmd_enable_channels(int argc, const char **argv)
        int opt, ret = CMD_SUCCESS;
        static poptContext pc;
        char *session_name = NULL;
+       char *opt_arg = NULL;
 
        init_channel_config();
 
@@ -319,38 +321,108 @@ int cmd_enable_channels(int argc, const char **argv)
                        DBG("Channel set to overwrite");
                        break;
                case OPT_SUBBUF_SIZE:
-                       /* TODO Replace atol with strtol and check for errors */
-                       chan.attr.subbuf_size = atol(poptGetOptArg(pc));
+                       /* Parse the size */
+                       opt_arg = poptGetOptArg(pc);
+                       if (utils_parse_size_suffix(opt_arg, &chan.attr.subbuf_size) < 0) {
+                               ERR("Wrong value the --subbuf-size parameter: %s", opt_arg);
+                               ret = CMD_ERROR;
+                               goto end;
+                       }
+
+                       /* Check if power of 2 */
+                       if ((chan.attr.subbuf_size - 1) & chan.attr.subbuf_size) {
+                               ERR("The subbuf size is not a power of 2: %" PRIu64 " (%s)",
+                                               chan.attr.subbuf_size, opt_arg);
+                               ret = CMD_ERROR;
+                               goto end;
+                       }
+
                        DBG("Channel subbuf size set to %" PRIu64, chan.attr.subbuf_size);
                        break;
                case OPT_NUM_SUBBUF:
-                       /* TODO Replace atoi with strtol and check for errors */
-                       chan.attr.num_subbuf = atoi(poptGetOptArg(pc));
+                       errno = 0;
+                       chan.attr.num_subbuf = strtoull(poptGetOptArg(pc), NULL, 0);
+                       if (errno != 0) {
+                               ERR("Wrong value the --num-subbuf parameter: %s", opt_arg);
+                               ret = CMD_ERROR;
+                               goto end;
+                       }
+
                        DBG("Channel subbuf num set to %" PRIu64, chan.attr.num_subbuf);
                        break;
                case OPT_SWITCH_TIMER:
-                       /* TODO Replace atoi with strtol and check for errors */
-                       chan.attr.switch_timer_interval = atoi(poptGetOptArg(pc));
+               {
+                       unsigned long v;
+
+                       errno = 0;
+                       v = strtoul(poptGetOptArg(pc), NULL, 0);
+                       if (errno != 0) {
+                               ERR("Wrong value the --switch-timer parameter: %s", opt_arg);
+                               ret = CMD_ERROR;
+                               goto end;
+                       }
+                       if (v != (uint32_t) v) {
+                               ERR("32-bit overflow in --switch-timer parameter: %s", opt_arg);
+                               ret = CMD_ERROR;
+                               goto end;
+                       }
+                       chan.attr.switch_timer_interval = (uint32_t) v;
                        DBG("Channel switch timer interval set to %d", chan.attr.switch_timer_interval);
                        break;
+               }
                case OPT_READ_TIMER:
-                       /* TODO Replace atoi with strtol and check for errors */
-                       chan.attr.read_timer_interval = atoi(poptGetOptArg(pc));
+               {
+                       unsigned long v;
+
+                       errno = 0;
+                       v = strtoul(poptGetOptArg(pc), NULL, 0);
+                       if (errno != 0) {
+                               ERR("Wrong value the --read-timer parameter: %s", opt_arg);
+                               ret = CMD_ERROR;
+                               goto end;
+                       }
+                       if (v != (uint32_t) v) {
+                               ERR("32-bit overflow in --read-timer parameter: %s", opt_arg);
+                               ret = CMD_ERROR;
+                               goto end;
+                       }
+                       chan.attr.read_timer_interval = (uint32_t) v;
                        DBG("Channel read timer interval set to %d", chan.attr.read_timer_interval);
                        break;
+               }
                case OPT_USERSPACE:
                        opt_userspace = 1;
                        break;
                case OPT_TRACEFILE_SIZE:
-                       chan.attr.tracefile_size = atoll(poptGetOptArg(pc));
+                       if (utils_parse_size_suffix(opt_arg, &chan.attr.tracefile_size) < 0) {
+                               ERR("Wrong value the --tracefile-size parameter: %s", opt_arg);
+                               ret = CMD_ERROR;
+                               goto end;
+                       }
                        DBG("Maximum tracefile size set to %" PRIu64,
                                        chan.attr.tracefile_size);
                        break;
                case OPT_TRACEFILE_COUNT:
-                       chan.attr.tracefile_count = atoll(poptGetOptArg(pc));
+               {
+                       unsigned long v;
+
+                       errno = 0;
+                       v = strtoul(poptGetOptArg(pc), NULL, 0);
+                       if (errno != 0) {
+                               ERR("Wrong value the --tracefile-count parameter: %s", opt_arg);
+                               ret = CMD_ERROR;
+                               goto end;
+                       }
+                       if (v != (uint32_t) v) {
+                               ERR("32-bit overflow in --tracefile-count parameter: %s", opt_arg);
+                               ret = CMD_ERROR;
+                               goto end;
+                       }
+                       chan.attr.tracefile_count = (uint32_t) v;
                        DBG("Maximum tracefile count set to %" PRIu64,
                                        chan.attr.tracefile_count);
                        break;
+               }
                case OPT_LIST_OPTIONS:
                        list_cmd_options(stdout, long_options);
                        goto end;
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