Archives Oct. 26, 2015

linux c library function to read binary file code

struct person
{
    int id;
    char name[20];
    int age;
    int sex;
    char tel[20];
};


int main(int arg, char *args[])
{
    FILE *p = fopen(args[1], "w");
    if (p == NULL)
    {
        printf("error is %s\n", strerror(errno));
    } else
    {
        printf("success\n");
        struct person man;
        memset(&man, 0 ...

read dir code

int main(int arg, char *args[])
{
    if (arg <2)
        return 0;

    DIR *dp;
    struct dirent *dirp;
    dp = opendir(args[1]);
    if (dp == NULL)
    {
        printf("error is %s\n", strerror(errno));
        return 0;
    }

    while((dirp = readdir(dp)) != NULL)
    {
        printf("%s\n", dirp->d_name);

    }

    closedir(dp);

    return 0;
}

[root@linux ~]# history [n]
[root@linux ~]# history [-c]
[root@linux ~]# history [-raw] histfiles

Parameters：

-n  ：number, meaning ' the n command to list the most recent list ' means!

-c  ：All the history in the current shell delete all content

-a  ：Will be added into the history currently added instruction in histfiles, if not histfiles, then the ...