Linux C 程序执行 shell 命令并获取返回结果

TS1130

于 2019-10-08 18:45:33 发布

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分类专栏： linux服务端开发

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#include <stdio.h>
#include <string.h>
#include <errno.h>

int main(int argc,char*argv[])
{
    FILE *fstream = NULL;
    char buff[1024], command_buf[1024];
    memset(buff, 0, sizeof(buff));
    memset(command_buf, 0, sizeof(command_buf));

    sprintf(command_buf, "%s %s %s", argv[1], argv[2], argv[3]);

    if(NULL == (fstream = popen(command_buf,"r")))
    {
        fprintf(stderr,"execute command failed: %s",strerror(errno));
        return -1;
    }
    
    while(NULL != fgets(buff, sizeof(buff), fstream))
    {
        printf("%s",buff);
        //printf("buff size: %ld", sizeof(buff));
    }
    pclose(fstream);

    return 0;
}

./a.out diff 1.txt 2.txt

https://blog.youkuaiyun.com/lu_embedded/article/details/78669939