ctrl+c,ctrl+d,ctrl+z在linux中意義

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#include <errno.h>#include <fcntl.h>#include <sys/types.h>#include <sys/stat.h>#include <stdlib.h>#include <string.h>#define BUFFER_SIZE 1024int main(int argc, char *argv[]){    int fd;    char buffer[BUFFER_SIZE];    if(argc!=2)    {        fprintf(stderr,"Usage:%s outfilename\n\a",argv[0]);        exit(EXIT_FAILURE);    }    if((fd=open(argv[1],O_WRONLY|O_CREAT|O_TRUNC,S_IRUSR|S_IWUSR))==-1)    {        fprintf(stderr,"Open %s Error:%s\n\a",argv[1],strerror(errno));        exit(EXIT_FAILURE);    }    if(dup2(fd,fileno(stdout))==-1)    {        fprintf(stderr,"Redirect Standard Out Error: %s\n\a",strerror(errno));        exit(EXIT_FAILURE);    }    fprintf(stderr,"Now, please input string");    fprintf(stderr,"(To quit use CTRL+D)\n");    while(1)    {        fgets(buffer,BUFFER_SIZE,stdin);        if(feof(stdin))            break;        write(fileno(stdout),buffer,strlen(buffer));    }    exit(EXIT_SUCCESS);}

ctrl-c 是發送 SIGINT 訊號，終止一個進程

ctrl-z 是發送 SIGSTOP訊號，掛起一個進程ctrl-d 不是發送訊號，而是表示一個特殊的二進位值，表示 EOF