mirror of https://github.com/t1meshift/os_labs.git
79 lines
2.1 KiB
C
79 lines
2.1 KiB
C
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#include <assert.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <stdbool.h>
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#include <stdint.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/stat.h>
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#include <sys/sysmacros.h>
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#include <sys/time.h>
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#include <sys/wait.h>
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#include <time.h>
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#include <unistd.h>
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/*
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4. Разработать собственную версию (mystat) команды stat, которая просто осуществляет системный вызов stat(), выводит
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размер, число задействованных блоков, число ссылок и т.д. Отследить, как меняется число ссылок, когда изменяется
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содержимое директории.
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*/
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#define MAX(a,b) ((a)>(b)?(a):(b))
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#define FATAL(fmt, ...) do {\
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fprintf(stderr,fmt,##__VA_ARGS__);\
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exit(1);\
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} while (0)
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int main(int argc, char *argv[]) {
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if (argc != 2) {
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FATAL("Usage: %s <path>\n", argv[0]);
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}
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char *path = argv[1];
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struct stat sb;
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if (lstat(path, &sb) == -1) {
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perror("lstat()");
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FATAL("Couldn't stat %s\n", path);
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}
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printf("File: %s\n", path);
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printf("Size: %ld\tBlocks: %ld\tIO Block: %ld\t", sb.st_size, sb.st_blocks, sb.st_blksize);
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switch(sb.st_mode & S_IFMT) {
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case S_IFBLK:
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puts("block device");
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break;
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case S_IFCHR:
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puts("character device");
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break;
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case S_IFDIR:
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puts("directory");
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break;
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case S_IFIFO:
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puts("FIFO/pipe");
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break;
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case S_IFLNK:
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puts("symlink");
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break;
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case S_IFREG:
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puts("regular file");
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break;
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case S_IFSOCK:
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puts("socket");
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break;
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default:
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puts("unknown?");
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break;
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}
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printf("Device: [%04x:%04x]\t", major(sb.st_dev), minor(sb.st_dev));
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printf("Inode: %lu\t", sb.st_ino);
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printf("Links: %lu\n", sb.st_nlink);
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printf("Mode: 0%o\tUid: %d\tGid: %d\n", sb.st_mode, sb.st_uid, sb.st_gid);
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printf("Access (atime): %s", ctime(&sb.st_atime));
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printf("Modify (mtime): %s", ctime(&sb.st_mtime));
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printf("Change (ctime): %s", ctime(&sb.st_ctime));
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return 0;
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}
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