mycat實現linux cat命令相似功能

/* * mycat.c *  * Copyright 2013 spark <spark@spark-vbox> *  */#include <stdio.h>int main(int argc, char **argv){FILE *fp;void filecopy(FILE *, FILE *);if(argc == 1){filecopy(stdin,stdout);}else{while(--argc>0){if( (fp=fopen(*++argv,"r")) ==NULL){printf("fail to open file %s.\n",*argv);return 1;}else{filecopy(fp,stdout);fclose(fp);}}}return 0;}void filecopy(FILE * from, FILE * to){int ch;while((ch=getc(from))!=EOF){putc(ch,to);}}

 以上來自《C Programming Language》

總以為linux命令的實現較神秘微妙，以上實現和cat命令相似功能。感覺很簡潔很美啊～！