blocks|key|1298023|text|在您的示例中，您似乎根本不需要CTRL-C+handlind。"signal(+SIGINT，SIG_IGN)“对你来说似乎足够了，除非你的应用程序必须处理来自其他来源的SIGINT。CTRL-D通常不会生成信号，它只是简单地传达EOF条件。一般来说，您可以控制终端的行为(我们讨论的是控制台输入，不是吗？)通过使用termios+library+(也可以是here)。您可以启用、重新定义或禁用“中断”字符(CTRL-C)、EOF+one和许多其他字符(XON、XOFF、调制解调器控制...)|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1298024|问候|1298025|entityMap|0|LINK|mutability|MUTABLE|url|http://www.google.it/url?sa=t&source=web&ct=res&cd=3&ved=0CBUQFjAC&url=http%253A%252F%252Flinux.about.com%252Flibrary%252Fcmd%252Fblcmdl3_termios.htm&rct=j&q=termios&ei=p02lS8qwMtOO_AaYn7GKCg&usg=AFQjCNG1oLPc8YXEAYwvvrS1JyHnnJQbRg|1|http://en.wikibooks.org/wiki/Serial_Programming/termios^0|4E|F|0|4Z|4|1|0|0^^$0|@$1|2|3|4|5|6|7|P|8|@]|9|@$A|Q|B|R|1|S]|$A|T|B|U|1|V]]|C|$]]|$1|D|3|E|5|6|7|W|8|@]|9|@]|C|$]]|$1|F|3|-4|5|6|7|X|8|@]|9|@]|C|$]]]|G|$H|$5|I|J|K|C|$L|M]]|N|$5|I|J|K|C|$L|O]]]]

In your example it seems you don't need CTRL-C handlind at all. A "signal(SIGINT,SIG_IGN)" seems enough for you, unless your application must handle a SIGINT coming from some other source.
CTRL-D doesn't usually generates signals, it simply communicates the EOF condition.
You can in general control the behavior of your terminal (we are talking about console input, it isn't?) by using the <a href="http://www.google.it/url?sa=t&amp;source=web&amp;ct=res&amp;cd=3&amp;ved=0CBUQFjAC&amp;url=http%3A%2F%2Flinux.about.com%2Flibrary%2Fcmd%2Fblcmdl3_termios.htm&amp;rct=j&amp;q=termios&amp;ei=p02lS8qwMtOO_AaYn7GKCg&amp;usg=AFQjCNG1oLPc8YXEAYwvvrS1JyHnnJQbRg" rel="nofollow noreferrer">termios library</a> (also <a href="http://en.wikibooks.org/wiki/Serial_Programming/termios" rel="nofollow noreferrer">here</a>). You can enable, redefine or disable the "interrupt" character (CTRL-C), the EOF one and many other ones (XON, XOFF, modem control...)

Regards

blocks|key|1082963|text|首先，Ctrl%2BD是一个你不能捕获的EOF指示器，当程序等待输入时，点击Ctrl%2BD表示文件结束，不会有更多的输入。另一方面，使用Ctrl%2BC来终止程序-也就是SIGINT，它可以通过这样做来捕获：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1082964|#include+<stdio.h>
#include+<signal.h>
#include+<stdlib.h>
#include+<stdarg.h>

static+void+signal_handler(int);
static+void+cleanup(void);
void+init_signals(void);
void+panic(const+char+*,+...);

struct+sigaction+sigact;
char+*progname;

int+main(int+argc,+char+**argv){
++++char+*s;
++++progname+=+*(argv);
++++atexit(cleanup);
++++init_signals();
++++//+do+the+work
++++exit(0);
}

void+init_signals(void){
++++sigact.sa_handler+=+signal_handler;
++++sigemptyset(&sigact.sa_mask);
++++sigact.sa_flags+=+0;
++++sigaction(SIGINT,+&sigact,+(struct+sigaction+*)NULL);
}

static+void+signal_handler(int+sig){
++++if+(sig+==+SIGINT)+panic("Caught+signal+for+Ctrl%2BC\n");
}

void+panic(const+char+*fmt,+...){
++++char+buf[50];
++++va_list+argptr;
++++va_start(argptr,+fmt);
++++vsprintf(buf,+fmt,+argptr);
++++va_end(argptr);
++++fprintf(stderr,+buf);
++++exit(-1);
}

void+cleanup(void){
++++sigemptyset(&sigact.sa_mask);
++++/*+Do+any+cleaning+up+chores+here+*/
}|code-block|syntax|javascript|1082965|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Firstly, Ctrl+D is an EOF indicator which you cannot trap, when a program is waiting for input, hitting Ctrl+D signifies end of file and to expect no more input. On the other hand, using Ctrl+C to terminate a program - that is SIGINT, which can be trapped by doing this:

<pre><code>#include &lt;stdio.h&gt;
#include &lt;signal.h&gt;
#include &lt;stdlib.h&gt;
#include &lt;stdarg.h&gt;

static void signal_handler(int);
static void cleanup(void);
void init_signals(void);
void panic(const char *, ...);

struct sigaction sigact;
char *progname;

int main(int argc, char **argv){
 char *s;
 progname = *(argv);
 atexit(cleanup);
 init_signals();
 // do the work
 exit(0);
}

void init_signals(void){
 sigact.sa_handler = signal_handler;
 sigemptyset(&amp;sigact.sa_mask);
 sigact.sa_flags = 0;
 sigaction(SIGINT, &amp;sigact, (struct sigaction *)NULL);
}

static void signal_handler(int sig){
 if (sig == SIGINT) panic("Caught signal for Ctrl+C\n");
}

void panic(const char *fmt, ...){
 char buf[50];
 va_list argptr;
 va_start(argptr, fmt);
 vsprintf(buf, fmt, argptr);
 va_end(argptr);
 fprintf(stderr, buf);
 exit(-1);
}

void cleanup(void){
 sigemptyset(&amp;sigact.sa_mask);
 /* Do any cleaning up chores here */
}
</code></pre>

blocks|key|1083006|text|这是一个当按下Ctrl%2Bc时处理信号的程序|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1083007|signal函数语法为：signal(signal+name,+function+name);|offset|length|style|CODE|1083008|#include<stdio.h>
#include<signal.h>++//+for+handling+signal+

void+signal_handler()+
{
++++printf("Signal+Handled+here\n");
}

main()+
{
++++printf("In+main+function..\n");

++++//+SIGINT+is+signal+name+create++when+Ctrl%2Bc+will+pressed+
++++signal(SIGINT,signal_handler);++

++++sleep(15);

++++printf("In+main+after+called+from+signal_handle+\n");

}|code-block|syntax|javascript|1083009|entityMap^0|0|C|Z|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|P|8|@$D|Q|E|R|F|G]]|9|@]|A|$]]|$1|H|3|I|5|J|7|S|8|@]|9|@]|A|$K|L]]|$1|M|3|-4|5|6|7|T|8|@]|9|@]|A|$]]]|N|$]]

This is a program for handling signal when pressed Ctrl+c 

The syntax for signal function is : <code>signal(signal name, function name);</code>

<pre><code>#include&lt;stdio.h&gt;
#include&lt;signal.h&gt; // for handling signal 

void signal_handler() 
{
 printf("Signal Handled here\n");
}

main() 
{
 printf("In main function..\n");

 // SIGINT is signal name create when Ctrl+c will pressed 
 signal(SIGINT,signal_handler); 

 sleep(15);

 printf("In main after called from signal_handle \n");

}
</code></pre>

blocks|key|1298130|text|#include<signal.h>
#include<unistd.h>
#include<stdio.h>
void+signal_catch()
{
++++printf("hi,Your+signal+catched+Here");++
}
int+main()
{
++++signal(SIGINT,signal_catch);
//press+ctrl%2Bc
++++sleep(10);
++++return+0;
}//end+main

//if+you+want+to+simply+ignore+ctrl%2Bc+interrupt+use+following+code+in+main

int+main()
{
++++signal(SIGINT,SIG_IGN);
++++sleep(100);
++++return+0;
}//end+main++
//this+program++wont+accept+ctrl%2Bc+interrupt+for+100+seconds.+|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|1298131|unstyled|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|G|8|@]|9|@]|A|$B|C]]|$1|D|3|-4|5|E|7|H|8|@]|9|@]|A|$]]]|F|$]]

<pre><code>#include&lt;signal.h&gt;
#include&lt;unistd.h&gt;
#include&lt;stdio.h&gt;
void signal_catch()
{
 printf("hi,Your signal catched Here"); 
}
int main()
{
 signal(SIGINT,signal_catch);
//press ctrl+c
 sleep(10);
 return 0;
}//end main

//if you want to simply ignore ctrl+c interrupt use following code in main

int main()
{
 signal(SIGINT,SIG_IGN);
 sleep(100);
 return 0;
}//end main 
//this program wont accept ctrl+c interrupt for 100 seconds. 
</code></pre>

How can I implement signal Handling for Ctrl-C and Ctrl-D in C....So If Ctrl-C is pressed then the program will ignore and try to get the input from the user again...If Ctrl-D is pressed then the program will terminate...

My program follows: 

<pre><code>int main(){
 char msg[400];

 while(1){
 printf("Enter: ");
 fgets(msg,400,stdin);
 printf("%s\n",msg); 
 }
}
</code></pre>

Thanks, 

Dave

Signal Handling in C

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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如何在C....So中实现Ctrl-C和Ctrl-D的信号处理如果按下Ctrl-C，则程序将忽略并尝试从用户again...If获取输入。按下Ctrl-D，程序将终止...我的程序如下：int main(){ char msg[400]; while(1){   printf("Enter: ");   fgets(m...

问C语言中的信号处理
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