用fseek和ftell获取文件的大小
时间:2014-05-02 18:05:54
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#include <stdio.h> #include <stdlib.h> #include <unistd.h> int main(int argc,char *argv[]) { int n=0; FILE *fp; if((fp=fopen(argv[1],"r"))==NULL) { perror("fopen"); exit(EXIT_FAILURE); } if(fseek(fp,0,SEEK_END)!=0) { perror("fseek"); exit(EXIT_FAILURE); } if((n=ftell(fp))==-1) { perror("ftell"); exit(EXIT_FAILURE); } printf("the size counted by fseek/ftell of the file is %d \n",n); printf("this is ls output:\n"); execl("/bin/ls","ls","-l",argv[1],(char *)0); fclose(fp); }
在Ubuntu中运行结果
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