C语言实现lsl命令的源代码

C语言实现ls -l命令的源代码如下所示：

#include <stdio.h>

#include <stdlib.h>

#include <sys types.h="">

#include <dirent.h>

#include <pwd.h>

#include <grp.h>

#include <sys stat.h="">

#include <time.h>



void display_file_info(char *filename) {

    struct stat statbuf;

    if (stat(filename, &statbuf) == -1) {

        perror(\"stat\");

        return;

    }

    struct passwd *pw = getpwuid(statbuf.st_uid);

    struct group *gr = getgrgid(statbuf.st_gid);

    char timebuf[100];

    strftime(timebuf, sizeof(timebuf), \"%b %d %H:%M\", localtime(&statbuf.st_mtime));



    printf(\"%c%c%c%c%c%c%c%c%c%c %ld %s %s %ld %s %s\

\",

           (S_ISDIR(statbuf.st_mode)) ? 'd' : '-',(statbuf.st_mode & S_IRUSR) ? 'r' : '-',(statbuf.st_mode & S_IWUSR) ? 'w' : '-',(statbuf.st_mode & S_IXUSR) ? 'x' : '-',(statbuf.st_mode & S_IRGRP) ? 'r' : '-',(statbuf.st_mode & S_IWGRP) ? 'w' : '-',(statbuf.st_mode & S_IXGRP) ? 'x' : '-',(statbuf.st_mode & S_IROTH) ? 'r' : '-',(statbuf.st_mode & S_IWOTH) ? 'w' : '-',(statbuf.st_mode & S_IXOTH) ? 'x' : '-',

           statbuf.st_nlink, pw->pw_name, gr->gr_name, statbuf.st_size, timebuf, filename);

}



int main(int argc, char *argv[]) {

    DIR *dir;

    struct dirent *entry;

    if (argc < 2) {

        dir = opendir(\".\");

    } else {

        dir = opendir(argv[1]);

    }

    if (!dir) {

        perror(\"opendir\");

        return 1;

    }



    while ((entry = readdir(dir)) != NULL) {

        display_file_info(entry->d_name);

    }



    closedir(dir);

    return 0;

}

</time.h></sys></grp.h></pwd.h></dirent.h></sys></stdlib.h></stdio.h>