popen的使用

Posted 2022-12-02 alen_xie

今天看到一段写的不错的代码，整理了一下，提供学习一下：

int MatchingString(char *acStr, char *acDes, int iDesLeng)

    FILE *stream = popen(acStr, "r");
    if (NULL == stream)
    
        printf("failed to popen ifconfig!!\\n");
        return 0;
    
    memset( acDes, '\\0', iDesLeng);
    fread( acDes, sizeof(char), iDesLeng, stream);
    pclose(stream);
    return 1;

MatchingString("ifconfig | grep HWaddr", buf, sizeof(buf));
char local_mac[1024];
memset( local_mac, '\\0', 1024 );
char *pMacAddr = strstr(buf, "HWaddr");

if(pMacAddr==NULL)

	printf("HWaddr is empty , please check your system's language !\\n");
	return 0;



sscanf(pMacAddr+6, "%s", local_mac);

        MatchingString("dmidecode | grep UUID", buf, sizeof(buf));
        char local_uuid[1024];
        memset( local_uuid, '\\0', 1024 );
        sscanf(buf, "%*[^ ]%s", local_uuid);