linux c 读取文件行数

linux c 读取文件行数参照wc 系统命令编写的函数如下：

#include <fcntl.h>#include <stdlib.h>#define MAXBSIZE 65536u_long file_wc(char *file){register u_char *p;register short gotsp;register int ch, len;register u_long linect, charct;int fd;u_char buf[MAXBSIZE];if (file) {if ((fd = open(file, O_RDONLY, 0)) < 0)return -1;for (gotsp = 1; len = read(fd, buf, MAXBSIZE);) {if (len == -1)return -1;charct += len;for (p = buf; len--;) {ch = *p++;if (ch == '/n')++linect;if (isspace(ch))gotsp = 1;else if (gotsp) {gotsp = 0;}}}}return linect;}

 

测试c

#include <stdlib.h>int main(int argc,char *argv[]){u_long row;row= file_wc("test.unl");printf("%d/n",row);return 0;}