来自覆盆子pi的Kaa C应用(Kaa C application from raspberry pi)
我正尝试在我的树莓派上构建一个C应用程序，以便将日志发送到kaa服务器，我正在关注官方网站上的C文档。 我已经设法做到这一点之前使用Java，但现在我想做同样的应用程序，但在C.这里是我的代码
#include <stdio.h> #include <stdlib.h> #include <kaa/kaa.h> #include <kaa/platform/kaa_client.h> #include <kaa/kaa_error.h> #include <extensions/logging/kaa_logging.h> #include <kaa/platform-impl/common/ext_log_upload_strategies.h> #define LOG_UPLOAD_THRESHOLD 5 typedef struct { kaa_client_t *kaa_client; kaa_string_t * uuid; kaa_string_t * proximity; int32_t major; int32_t minor; int32_t measured_power; int32_t rssi; double accuracy; } log_context; static void sendLog(void *context) { if (context == NULL) { return; } log_context * log_details_context = context; kaa_logging_beacon_t *log_record = kaa_logging_beacon_create(); if (!log_record) { printf("Failed to create log record\r\n"); kaa_client_stop(log_details_context->kaa_client); return; } log_record->uuid = log_details_context->uuid; log_record->major = log_details_context->major; log_record->minor = log_details_context->minor; log_record->measured_power = log_details_context->measured_power; log_record->rssi = log_details_context->rssi; log_record->accuracy = log_details_context->accuracy; log_record->proximity = log_details_context->proximity; kaa_error_t error = kaa_logging_add_record( kaa_client_get_context(log_details_context->kaa_client)->log_collector, log_record, NULL); if (error) { printf("Failed to add log record, error code %d\r\n"); kaa_client_stop(log_details_context->kaa_client); return; } // log_record->destroy(log_record); kaa_client_stop(log_details_context->kaa_client); } int main(int argc, char **argv) { double accuracy; kaa_string_t * uuid; kaa_string_t * proximity; int32_t major, minor, measured_power, rssi; if (argc != 8) { printf("Number of arguments are not right"); return EXIT_FAILURE; } uuid = argv[1]; if (sscanf (argv[2], "%i", &major) != 1) { printf("Major is not an integer"); return EXIT_FAILURE; } if (sscanf (argv[3], "%i", &minor) != 1) { printf("Minor is not an integer"); return EXIT_FAILURE; } if (sscanf (argv[4], "%i", &measured_power) != 1) { printf("Measured power is not an integer"); return EXIT_FAILURE; } if (sscanf (argv[5], "%i", &rssi) != 1) { printf("RSSI is not an integer"); return EXIT_FAILURE; } if (sscanf (argv[6], "%lf", &accuracy) != 1) { printf("Accuracy is not a double"); return EXIT_FAILURE; } proximity = argv[7]; /* printf("UUID = %s\n", uuid); printf("major = %d\n", major); printf("minor = %d\n", minor); printf("measured power = %d\n", measured_power); printf("RSSI = %d\n", rssi); printf("accuracy = %lf\n", accuracy); printf("proximity = %s\n", proximity); */ /** * Initialize Kaa client. */ kaa_client_t *kaa_client = NULL; kaa_error_t error = kaa_client_create(&kaa_client, NULL); if (error) { printf("Failed to create Kaa client\r\n", error); return EXIT_FAILURE; } log_context log_details_context; log_details_context.kaa_client = kaa_client; log_details_context.uuid = uuid; log_details_context.major = major; log_details_context.minor = minor; log_details_context.measured_power = measured_power; log_details_context.rssi = rssi; log_details_context.proximity = proximity; log_details_context.accuracy = accuracy; void *log_upload_strategy_context = NULL; error = ext_log_upload_strategy_create(kaa_client_get_context(kaa_client), &log_upload_strategy_context, KAA_LOG_UPLOAD_VOLUME_STRATEGY); if (error) { printf("Failed to create log upload strategy, error code %d\r\n", error); return EXIT_FAILURE; } error = ext_log_upload_strategy_set_threshold_count(log_upload_strategy_context, LOG_UPLOAD_THRESHOLD); if (error) { printf("Failed to set threshold log record count, error code %d\r\n", error); return EXIT_FAILURE; } error = kaa_logging_set_strategy(kaa_client_get_context(kaa_client)->log_collector, log_upload_strategy_context); if (error) { printf("Failed to set log upload strategy, error code %d\r\n", error); return EXIT_FAILURE; } /** * Start Kaa client main loop. */ error = kaa_client_start(kaa_client, sendLog, &log_details_context, 0); if (error) { printf("Failed to start Kaa client, error code %d\r\n", error); return EXIT_FAILURE; } /** * Destroy Kaa client. */ kaa_client_destroy(kaa_client); return EXIT_SUCCESS; }我在控制台上得到以下输出：
2017/02/05 0:24:47 [INFO] [kaa.c:149] (0) - Kaa SDK version 0.10.0, commit hash 2017/02/05 0:24:47 [DEBUG] [kaa_logging.c:383] (0) - Initialized log collector with log storage {0x2037c40}, log upload strategy {0x2037c78} 2017/02/05 0:24:47 [INFO] [kaa_client.c:471] (0) - Log collector init completed 2017/02/05 0:24:47 [INFO] [kaa_client.c:155] (0) - Kaa client created 2017/02/05 0:24:47 [INFO] [kaa_client.c:295] (0) - Starting Kaa client... Segmentation fault (core dumped)这里是我从gdb获得的调试信息
Starting program: /home/delvebyte/projects/beacon-scanner-pi/kaa-application-c/build/kaa-app UUID 0 1 -65 -72 0.873637383 near 2017/02/06 16:20:26 [INFO] [kaa.c:149] (0) - Kaa SDK version 0.10.0, commit hash 2017/02/06 16:20:26 [DEBUG] [kaa_logging.c:383] (0) - Initialized log collector with log storage {0x5555557a14d0}, log upload strategy {0x5555557a1ab0} 2017/02/06 16:20:26 [INFO] [kaa_client.c:471] (0) - Log collector init completed 2017/02/06 16:20:26 [INFO] [kaa_client.c:155] (0) - Kaa client created 2017/02/06 16:20:26 [INFO] [kaa_client.c:295] (0) - Starting Kaa client... Program received signal SIGSEGV, Segmentation fault. strlen () at ../sysdeps/x86_64/strlen.S:106 106 ../sysdeps/x86_64/strlen.S: No such file or directory. (gdb) bt #0 strlen () at ../sysdeps/x86_64/strlen.S:106 #1 0x00005555555658c2 in kaa_string_get_size (data=0x7fffffffe256) at /home/delvebyte/projects/beacon-scanner-pi/kaa-application-c/kaa/src/kaa/kaa_common_schema.c:117 #2 0x000055555556220d in kaa_logging_beacon_get_size (data=0x5555557a1b70) at /home/delvebyte/projects/beacon-scanner-pi/kaa-application-c/kaa/src/kaa/gen/kaa_logging_gen.c:63 #3 0x00005555555700f4 in kaa_logging_add_record (self=0x5555557a0bc0, entry=0x5555557a1b70, log_info=0x0) at /home/delvebyte/projects/beacon-scanner-pi/kaa-application-c/kaa/src/extensions/logging/kaa_logging.c:514 #4 0x0000555555556dcf in sendLog (context=0x7fffffffdd30) at /home/delvebyte/projects/beacon-scanner-pi/kaa-application-c/src/kaa-application.c:46 #5 0x0000555555557b48 in kaa_client_start (kaa_client=0x5555557a0010, external_process=0x555555556cf0 <sendLog>, external_process_context=0x7fffffffdd30, max_delay=0) at /home/delvebyte/projects/beacon-scanner-pi/kaa-application-c/kaa/src/kaa/platform-impl/posix/kaa_client.c:300 #6 0x0000555555557153 in main (argc=8, argv=0x7fffffffde68) at /home/delvebyte/projects/beacon-scanner-pi/kaa-application-c/src/kaa-application.c:160 (gdb)I am trying to build a C application on my raspberry pi to send log to the kaa server, I am following the C documentation from the official website. I have managed to do this before using java but now I am trying to do the same application but in C. Here is my code
#include <stdio.h> #include <stdlib.h> #include <kaa/kaa.h> #include <kaa/platform/kaa_client.h> #include <kaa/kaa_error.h> #include <extensions/logging/kaa_logging.h> #include <kaa/platform-impl/common/ext_log_upload_strategies.h> #define LOG_UPLOAD_THRESHOLD 5 typedef struct { kaa_client_t *kaa_client; kaa_string_t * uuid; kaa_string_t * proximity; int32_t major; int32_t minor; int32_t measured_power; int32_t rssi; double accuracy; } log_context; static void sendLog(void *context) { if (context == NULL) { return; } log_context * log_details_context = context; kaa_logging_beacon_t *log_record = kaa_logging_beacon_create(); if (!log_record) { printf("Failed to create log record\r\n"); kaa_client_stop(log_details_context->kaa_client); return; } log_record->uuid = log_details_context->uuid; log_record->major = log_details_context->major; log_record->minor = log_details_context->minor; log_record->measured_power = log_details_context->measured_power; log_record->rssi = log_details_context->rssi; log_record->accuracy = log_details_context->accuracy; log_record->proximity = log_details_context->proximity; kaa_error_t error = kaa_logging_add_record( kaa_client_get_context(log_details_context->kaa_client)->log_collector, log_record, NULL); if (error) { printf("Failed to add log record, error code %d\r\n"); kaa_client_stop(log_details_context->kaa_client); return; } // log_record->destroy(log_record); kaa_client_stop(log_details_context->kaa_client); } int main(int argc, char **argv) { double accuracy; kaa_string_t * uuid; kaa_string_t * proximity; int32_t major, minor, measured_power, rssi; if (argc != 8) { printf("Number of arguments are not right"); return EXIT_FAILURE; } uuid = argv[1]; if (sscanf (argv[2], "%i", &major) != 1) { printf("Major is not an integer"); return EXIT_FAILURE; } if (sscanf (argv[3], "%i", &minor) != 1) { printf("Minor is not an integer"); return EXIT_FAILURE; } if (sscanf (argv[4], "%i", &measured_power) != 1) { printf("Measured power is not an integer"); return EXIT_FAILURE; } if (sscanf (argv[5], "%i", &rssi) != 1) { printf("RSSI is not an integer"); return EXIT_FAILURE; } if (sscanf (argv[6], "%lf", &accuracy) != 1) { printf("Accuracy is not a double"); return EXIT_FAILURE; } proximity = argv[7]; /* printf("UUID = %s\n", uuid); printf("major = %d\n", major); printf("minor = %d\n", minor); printf("measured power = %d\n", measured_power); printf("RSSI = %d\n", rssi); printf("accuracy = %lf\n", accuracy); printf("proximity = %s\n", proximity); */ /** * Initialize Kaa client. */ kaa_client_t *kaa_client = NULL; kaa_error_t error = kaa_client_create(&kaa_client, NULL); if (error) { printf("Failed to create Kaa client\r\n", error); return EXIT_FAILURE; } log_context log_details_context; log_details_context.kaa_client = kaa_client; log_details_context.uuid = uuid; log_details_context.major = major; log_details_context.minor = minor; log_details_context.measured_power = measured_power; log_details_context.rssi = rssi; log_details_context.proximity = proximity; log_details_context.accuracy = accuracy; void *log_upload_strategy_context = NULL; error = ext_log_upload_strategy_create(kaa_client_get_context(kaa_client), &log_upload_strategy_context, KAA_LOG_UPLOAD_VOLUME_STRATEGY); if (error) { printf("Failed to create log upload strategy, error code %d\r\n", error); return EXIT_FAILURE; } error = ext_log_upload_strategy_set_threshold_count(log_upload_strategy_context, LOG_UPLOAD_THRESHOLD); if (error) { printf("Failed to set threshold log record count, error code %d\r\n", error); return EXIT_FAILURE; } error = kaa_logging_set_strategy(kaa_client_get_context(kaa_client)->log_collector, log_upload_strategy_context); if (error) { printf("Failed to set log upload strategy, error code %d\r\n", error); return EXIT_FAILURE; } /** * Start Kaa client main loop. */ error = kaa_client_start(kaa_client, sendLog, &log_details_context, 0); if (error) { printf("Failed to start Kaa client, error code %d\r\n", error); return EXIT_FAILURE; } /** * Destroy Kaa client. */ kaa_client_destroy(kaa_client); return EXIT_SUCCESS; }I am getting the following output on my console:
2017/02/05 0:24:47 [INFO] [kaa.c:149] (0) - Kaa SDK version 0.10.0, commit hash 2017/02/05 0:24:47 [DEBUG] [kaa_logging.c:383] (0) - Initialized log collector with log storage {0x2037c40}, log upload strategy {0x2037c78} 2017/02/05 0:24:47 [INFO] [kaa_client.c:471] (0) - Log collector init completed 2017/02/05 0:24:47 [INFO] [kaa_client.c:155] (0) - Kaa client created 2017/02/05 0:24:47 [INFO] [kaa_client.c:295] (0) - Starting Kaa client... Segmentation fault (core dumped)Here is the debug info I got from gdb
Starting program: /home/delvebyte/projects/beacon-scanner-pi/kaa-application-c/build/kaa-app UUID 0 1 -65 -72 0.873637383 near 2017/02/06 16:20:26 [INFO] [kaa.c:149] (0) - Kaa SDK version 0.10.0, commit hash 2017/02/06 16:20:26 [DEBUG] [kaa_logging.c:383] (0) - Initialized log collector with log storage {0x5555557a14d0}, log upload strategy {0x5555557a1ab0} 2017/02/06 16:20:26 [INFO] [kaa_client.c:471] (0) - Log collector init completed 2017/02/06 16:20:26 [INFO] [kaa_client.c:155] (0) - Kaa client created 2017/02/06 16:20:26 [INFO] [kaa_client.c:295] (0) - Starting Kaa client... Program received signal SIGSEGV, Segmentation fault. strlen () at ../sysdeps/x86_64/strlen.S:106 106 ../sysdeps/x86_64/strlen.S: No such file or directory. (gdb) bt #0 strlen () at ../sysdeps/x86_64/strlen.S:106 #1 0x00005555555658c2 in kaa_string_get_size (data=0x7fffffffe256) at /home/delvebyte/projects/beacon-scanner-pi/kaa-application-c/kaa/src/kaa/kaa_common_schema.c:117 #2 0x000055555556220d in kaa_logging_beacon_get_size (data=0x5555557a1b70) at /home/delvebyte/projects/beacon-scanner-pi/kaa-application-c/kaa/src/kaa/gen/kaa_logging_gen.c:63 #3 0x00005555555700f4 in kaa_logging_add_record (self=0x5555557a0bc0, entry=0x5555557a1b70, log_info=0x0) at /home/delvebyte/projects/beacon-scanner-pi/kaa-application-c/kaa/src/extensions/logging/kaa_logging.c:514 #4 0x0000555555556dcf in sendLog (context=0x7fffffffdd30) at /home/delvebyte/projects/beacon-scanner-pi/kaa-application-c/src/kaa-application.c:46 #5 0x0000555555557b48 in kaa_client_start (kaa_client=0x5555557a0010, external_process=0x555555556cf0 <sendLog>, external_process_context=0x7fffffffdd30, max_delay=0) at /home/delvebyte/projects/beacon-scanner-pi/kaa-application-c/kaa/src/kaa/platform-impl/posix/kaa_client.c:300 #6 0x0000555555557153 in main (argc=8, argv=0x7fffffffde68) at /home/delvebyte/projects/beacon-scanner-pi/kaa-application-c/src/kaa-application.c:160 (gdb)最满意答案
问题出在把kaa_string_t *当作char *来处理，当我更好地看一下kaa库时，我发现kaa_string_t是一个内部有char *的结构，所以我使用这个函数来初始化变量kaa_string_move_create，那就是它
The problem was in treating kaa_string_t * as char *, when I get a better look at the kaa library I found that kaa_string_t is a structure which has char * inside it, so I used this function to initialize the variable kaa_string_move_create and that was it
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