From e031d191e75c71fa162f9f898023116cfcbd8a04 Mon Sep 17 00:00:00 2001
From: Guo Wenxue <guowenxue@gmail.com>
Date: Fri, 16 Nov 2018 13:36:34 +0800
Subject: [PATCH] Update thread socket server program, add lowercase to uppercase convert
---
ch4_thread/socket_server_thread.c | 21 ++++++++++++++-------
1 files changed, 14 insertions(+), 7 deletions(-)
diff --git a/ch4_thread/socket_server_thread.c b/ch4_thread/socket_server_thread.c
index 7b194af..f2150a7 100644
--- a/ch4_thread/socket_server_thread.c
+++ b/ch4_thread/socket_server_thread.c
@@ -8,14 +8,13 @@
#include <stdlib.h>
#include <getopt.h>
#include <pthread.h>
+#include <ctype.h>
-#define MSG_STR "Hello LingYun IoT Studio Client\n"
typedef void *(THREAD_BODY) (void *thread_arg);
void *thread_worker(void *ctx);
int thread_start(pthread_t * thread_id, THREAD_BODY * thread_workbody, void *thread_arg);
-
void print_usage(char *progname)
{
@@ -106,7 +105,8 @@
printf("Accept new client[%s:%d] successfully\n", inet_ntoa(cliaddr.sin_addr), ntohs(cliaddr.sin_port));
- thread_start(&tid, thread_worker, &clifd);
+ /* ???? Can not pass &clifd to child process, U can think about the reason ???? */
+ thread_start(&tid, thread_worker, (void *)clifd);
}
@@ -159,6 +159,7 @@
int clifd;
int rv;
char buf[1024];
+ int i;
if( !ctx )
{
@@ -166,7 +167,7 @@
pthread_exit(NULL);
}
- clifd = *(int *)ctx;
+ clifd = (int)ctx;
printf("Child thread start to commuicate with socket client...\n");
@@ -176,13 +177,13 @@
rv=read(clifd, buf, sizeof(buf));
if( rv < 0)
{
- printf("Read data from client sockfd[%d] failure: %s\n", clifd, strerror(errno));
+ printf("Read data from client sockfd[%d] failure: %s and thread will exit\n", clifd, strerror(errno));
close(clifd);
pthread_exit(NULL);
}
else if( rv == 0)
{
- printf("Socket[%d] get disconnected\n", clifd);
+ printf("Socket[%d] get disconnected and thread will exit.\n", clifd);
close(clifd);
pthread_exit(NULL);
}
@@ -190,11 +191,17 @@
{
printf("Read %d bytes data from Server: %s\n", rv, buf);
}
+
+ /* convert letter from lowercase to uppercase */
+ for(i=0; i<rv; i++)
+ {
+ buf[i]=toupper(buf[i]);
+ }
rv=write(clifd, buf, rv);
if(rv < 0)
{
- printf("Write to client by sockfd[%d] failure: %s\n", clifd, strerror(errno));
+ printf("Write to client by sockfd[%d] failure: %s and thread will exit\n", clifd, strerror(errno));
close(clifd);
pthread_exit(NULL);
}
--
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