"he stat system call can access a file by name and retrieve file status information. It is given nt stat (const char *pathname, struct stat *buf); This system c eturns a stat structure (both the function and struct are called stat), which contains ollowing fields: truct stat { ev_t st_dev; /* ID of device containing file */ no_t st_ino; /* inode number */ node_t st_mode; * protection */ link t st nlink; /* number of hard links * id t st uid; * user ID of owner */ id t st gid; /* group ID of owner */ ev_t st_rdev; device ID (if special file) */ ff tst size; * total size, in bytes */ Iksize_t st blksize; *blocksize for file system IO * Ikcnt_t st blocks; * number of 512B blocks allocated */ ime t st_atime; / time of last access */ ime_t st_mtime; / time of last modification */ ime_t st_ctime; /* time of last status change */ On success, zero is returned. On error, -1 is returmed, and errno is set appropriately. ollowing program displays the time that the file path was last accessed. Type in and complete the following program on the computer. Save it printaccess.c. Compile the program, then execute it by giving it a path name as argument. printaccess.c: nelude nelude nclude I main (int arge, char *argv[]) li define an instance of struct stat (don't use a pointer). i Use the stat function store the status of the file in your stat struct Ii stat takes a pointer, so pass your struct by reference with & if( --1) il use perror to print error message then exit program il print the last access time for the file using defined instance of il struct stat. etime requires a pointer, hence the & below. printf ("%s last accessed at %s", argv[1], ctime(& st atime);
"he stat system call can access a file by name and retrieve file status information. It is given nt stat (const char *pathname, struct stat *buf); This system c eturns a stat structure (both the function and struct are called stat), which contains ollowing fields: truct stat { ev_t st_dev; /* ID of device containing file */ no_t st_ino; /* inode number */ node_t st_mode; * protection */ link t st nlink; /* number of hard links * id t st uid; * user ID of owner */ id t st gid; /* group ID of owner */ ev_t st_rdev; device ID (if special file) */ ff tst size; * total size, in bytes */ Iksize_t st blksize; *blocksize for file system IO * Ikcnt_t st blocks; * number of 512B blocks allocated */ ime t st_atime; / time of last access */ ime_t st_mtime; / time of last modification */ ime_t st_ctime; /* time of last status change */ On success, zero is returned. On error, -1 is returmed, and errno is set appropriately. ollowing program displays the time that the file path was last accessed. Type in and complete the following program on the computer. Save it printaccess.c. Compile the program, then execute it by giving it a path name as argument. printaccess.c: nelude nelude nclude I main (int arge, char *argv[]) li define an instance of struct stat (don't use a pointer). i Use the stat function store the status of the file in your stat struct Ii stat takes a pointer, so pass your struct by reference with & if( --1) il use perror to print error message then exit program il print the last access time for the file using defined instance of il struct stat. etime requires a pointer, hence the & below. printf ("%s last accessed at %s", argv[1], ctime(& st atime);
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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![Task 2: Printing the time that the file path was created (50 points)
The stat system call can access a file by name and retrieve file status information. It is given by:
int stat (const char *pathname, struct stat *buf); This system call
retums a stat structure (both the function and struct are called stat), which contains the
following fields:
struct stat {
dev_t st_dev; /* ID of device containing file */
ino_t st_ino; /* inode number */
mode_t st_mode; /* protection */
nlink t st nlink; /* number of hard links */
uid t st uid; /* user ID of owner */
gid_t st gid; /* group ID of owner */
dev_t st_rdev; /* device ID (if special file) */
off t st size; * total size, in bytes */
blksize_t st_blksize; blocksize for file system IO */
blkent t st blocks; /* number of 512B blocks allocated */
time_t st_atime; /* time of last access */
time_t st_mtime; * time of last modification */
time_t st_ctime; /* time of last status change */
On success, zero is returned. On error, -1 is returned, and errno is set appropriately. The
following program displays the time that the file path was last accessed.
Type in and complete the following program on the computer. Save it as
printaccess.c. Compile the program, then execute it by giving it a path name as an
argument.
printaccess.c:
#include <stdio.h>
#include <time.h>
#include <sys/stat.h>
int main (int arge, char *argv[])
i define an instance of struct stat (don't use a pointer).
li Use the stat function store the status of the file in your stat struct
li stat takes a pointer, so pass your struct by reference with &
if (
--1)
i use perror to print error message then exit program
il print the last access time for the file using defined instance of
il struct stat. etime requires a pointer, hence the & below.
printf ("%s last accessed at %s", argv[1), ctime(&
st_atime));](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F27786bdc-f87a-4d42-a054-75767b025a4a%2F3247ba7d-bcd5-4813-9dd1-864c2a8c2969%2Fsxb6gvh_processed.jpeg&w=3840&q=75)
Transcribed Image Text:Task 2: Printing the time that the file path was created (50 points)
The stat system call can access a file by name and retrieve file status information. It is given by:
int stat (const char *pathname, struct stat *buf); This system call
retums a stat structure (both the function and struct are called stat), which contains the
following fields:
struct stat {
dev_t st_dev; /* ID of device containing file */
ino_t st_ino; /* inode number */
mode_t st_mode; /* protection */
nlink t st nlink; /* number of hard links */
uid t st uid; /* user ID of owner */
gid_t st gid; /* group ID of owner */
dev_t st_rdev; /* device ID (if special file) */
off t st size; * total size, in bytes */
blksize_t st_blksize; blocksize for file system IO */
blkent t st blocks; /* number of 512B blocks allocated */
time_t st_atime; /* time of last access */
time_t st_mtime; * time of last modification */
time_t st_ctime; /* time of last status change */
On success, zero is returned. On error, -1 is returned, and errno is set appropriately. The
following program displays the time that the file path was last accessed.
Type in and complete the following program on the computer. Save it as
printaccess.c. Compile the program, then execute it by giving it a path name as an
argument.
printaccess.c:
#include <stdio.h>
#include <time.h>
#include <sys/stat.h>
int main (int arge, char *argv[])
i define an instance of struct stat (don't use a pointer).
li Use the stat function store the status of the file in your stat struct
li stat takes a pointer, so pass your struct by reference with &
if (
--1)
i use perror to print error message then exit program
il print the last access time for the file using defined instance of
il struct stat. etime requires a pointer, hence the & below.
printf ("%s last accessed at %s", argv[1), ctime(&
st_atime));
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