53 lines
1.3 KiB
C
53 lines
1.3 KiB
C
#include <fcntl.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <time.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <sys/sysmacros.h>
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#include <dirent.h>
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#include <string.h>
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#include <unistd.h>
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#define NAMELEN 2048
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#define BUFSIZE 1024
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int main(int argc, char *argv[]) {
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long long max_size = 0;
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char max_name[NAMELEN] = {};
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DIR *dir = opendir(".");
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struct dirent *file = NULL;
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while( (file = readdir(dir)) != NULL){
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struct stat sb;
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stat(file->d_name, &sb);
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printf("%-30s : %lld bytes\n",
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file->d_name, (long long) sb.st_size);
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if(sb.st_size > max_size){
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max_size = sb.st_size;
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strncpy(max_name, file->d_name, NAMELEN);
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}
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}
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closedir(dir);
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printf("Largest file: %s with %lld bytes\n",
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max_name, max_size);
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char copy_name[NAMELEN];
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snprintf(copy_name, NAMELEN, "%s.copy", max_name);
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printf("Copying %s to %s\n",max_name,copy_name);
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char buf[BUFSIZE];
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int infd = open(max_name, O_RDONLY);
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int flags = O_WRONLY | O_CREAT | O_TRUNC;
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mode_t perms = S_IRUSR | S_IWUSR;
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int outfd = open(copy_name, flags, perms);
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int nbytes;
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while( (nbytes = read(infd, buf, BUFSIZE)) > 0){
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write(outfd, buf, BUFSIZE);
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}
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printf("Copy complete\n");
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close(infd);
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close(outfd);
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return 0;
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}
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