0
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>

#define MAXLINE 512
main(int argc,char* argv[]){
    int k;

    for (k=1; k<=argc; k++) {
        if ((k%2)==0) {
            if (fork()==0){
                printf("asdsa");
                int fd; /*file descriptor to the file we will redirect ls's output*/

                if((fd = open("file1.txt", O_RDWR | O_CREAT))==-1){ /*open the file */
                    perror("open");
                    return 1;
                }

                dup2(fd,STDOUT_FILENO); /*copy the file descriptor fd into standard output*/
                dup2(fd,STDERR_FILENO); /* same, for the standard error */
                close(fd); /* close the file descriptor as we don't need it more  */

                /*execl ls */
                execl("/usr/bin/rev","rev",argv[k],NULL);
                exit(1);
            }
            else
            {
                wait(0);
            }

            char temp[512];
            sprintf(temp, "mv file1.txt %s",argv[k]);
            system((char *)temp);
        }
        else
        {
            if (fork()==0) {
                int fd; /*file descriptor to the file we will redirect ls's output*/

                if((fd = open("file2.txt", O_RDWR | O_CREAT))==-1){ /*open the file */
                    perror("open");
                    return 1;
                }

                dup2(fd,STDOUT_FILENO); /*copy the file descriptor fd into standard output*/
                dup2(fd,STDERR_FILENO); /* same, for the standard error */
                close(fd); /* close the file descriptor as we don't need it more  */

                execl("/usr/bin/awk","awk","-f","awk2.sh",argv[k],NULL);

                exit(1);
            }
            else
            {
                wait(0);                 
            }
            char temp[512];
            sprintf(temp, "mv file2.txt %s",argv[k]);
            system((char *)temp);
        }
    }
}

我尝试做的是将文件 file2.txt 重命名为argv[k],但它不起作用。基本上整个想法是将excel命令的结果保存在相同的文件 argv[k] 中。谁能帮我这个?

编辑:argv[]是在命令行中作为参数给出的文件列表,例如“file1.txt”“file5.txt”等。

Edit2:让我们假装我像这样运行

$gcc program.c
$./a.out myfile.txt


myfile.txt
abc
efg

ouk2.awk 所做的是保存在

file2.txt
cba
gfe

现在我接下来想要的是用 file2.txt 的内容重写 myfile.txt 所以

myfile.txt
cba
gfe

但是这最后一步不起作用,它应该由系统命令完成,但由于某种原因,文件“myfile.txt”没有任何变化,在我启动程序后,我得到的只是

myfile.txt
abc
efg

file2.txt
cba
gfe

在我想要得到之前我是怎么说的

myfile.txt
cba
gfe
4

0 回答 0