All Questions
57 questions
2
votes
0
answers
54
views
Good way to understand if file has been just created rather than modified in Linux
I need a way to learn if a file has been just created (rather than e.g. modified). I do it like this:
const bool isCreated =
((f.atime.tv_sec == f.mtime.tv_sec) &&
...
- 2,458
0
votes
1
answer
153
views
fread is reading the last part of my text file twice
I have a text file I want to read into an std::vector. It's okay if the vector is a little too big, but it seems to be doing a very weird thing: It's copying the entire file, then copying a portion ...
- 13k
1
vote
0
answers
45
views
When can st_ino change for a direcory?
I am trying to work with StructStat class in Android. As per android documentation at here
st_ino represents File Serial Number of object
st_blocks represents number of blocks allocated to this ...
- 8,488
0
votes
2
answers
192
views
How's stat function used in Perl?
Can anyone help me to understand the meaning of below line?
#!/usr/bin/perl
use File::stat;
...
sub rootdev { return (stat readlink)[0] == (stat "/")[0]; }
my @vols = shuffle map {/.*\/([...
- 43
2
votes
2
answers
1k
views
Stat function not working when passing file names of different directories [duplicate]
I am trying to implement the ls command and am getting stuck in the -i option using the stat() function to list inode numbers.
The format is ./myls [options] [list of files]
If I run ./myls -i . I ...
- 169
1
vote
1
answer
1k
views
How to convert string permission to mode_t type
I am writing a program which changes file permissions. The permissions will be passed through a command line argument as a char * and then converted to mode_t type and given to chmod().
How could I ...
- 322
2
votes
1
answer
692
views
how to change file timestamp including nanoseconds
I am making a program to copy files from a source to a destination directory and would like to change the destination file timestamps so they match the source file timestamps.
So far I have discovered ...
- 322
0
votes
0
answers
186
views
loading a files metadata into another file using stat()
I am writing a program to copy a file from a source directory x to a destination directory y.
However i used stat() to get file metadata from the source file.
Is there any way i could somehow load the ...
- 322
0
votes
2
answers
160
views
Directory inside directory is seen as file
I am trying to open a directory and read the files and folders and add '/' at the end of if it is a folder. This is my current code.
#include <dirent.h>
#include <sys/stat.h>
#include <...
- 1
0
votes
1
answer
199
views
How to get correct file size only on the completion of a detected file change, not at the beginning?
I'm using libuv's uv_fs_event_t to monitor file changes. And once a change is detected, I open the file in the callback uv_fs_event_cb.
However, my program requires to also get the full file size when ...
- 619
0
votes
1
answer
297
views
cp: cannot stat 'AmritaAura_local/amrita_aura/aura': No such file or directory
When I try to copy the files in virtual environment I get the above error.The command is cp -r AmritaAura_local/amrita_aura/aura AmritaAura_local/local_setup/venv/lib/python2.7/site-packages.
Where ...
4
votes
2
answers
5k
views
Check if a file is 20 hours old in ansible
I'm able to get the timestamp of a file using Ansible stat module.
- stat:
path: "/var/test.log"
register: filedets
- debug:
msg: "{{ filedets.stat.mtime }}"
The above ...
- 3,161
2
votes
2
answers
3k
views
how to check if any of the files in a directory changed
Given a directory, I'd like to know whether the files in the directory have been modified or not. (Boolean) i.e. if the directory's state has changed from before.
I don't want to run a file watcher ...
- 4,448
0
votes
0
answers
529
views
Does FTP's STAT [file] command (LIST [file]) guarantee proper status of file currently locked?
I searched the Internet about the problem with file being uploaded on the FTP, no locking mechanism what results in not knowing if file that FTP client want to get is being uploaded.
Main articles ...
0
votes
2
answers
310
views
How to count file in function of their age in Python?
I'm trying to count how many file are very young, young, old and very old in a directory passed by command line. I have some struggle counting the number of file in the directory and then to change ...
- 768
0
votes
1
answer
161
views
Where file status info actually store?
Where the file status info actually store when we using stat() in to get?
I'am learning Unix Programing, But i am confused when i using stat() function to get file status. There are no any ...
- 1
1
vote
0
answers
162
views
How to count the files in a directory using C
The canonical way of determining a file's type is to use the commented
out code in this snippet:
// Return the number of files in dirName. Ignore directories and links.
#include <sys/types.h>
#...
- 161
2
votes
1
answer
2k
views
Python3: Recursively compare two directories based on file contents
I have two directories containing a bunch of files and subfolders.
I would like to check if the file contents are the same in both directories (ignoring the file name). The subfolder structure should ...
- 3,161
3
votes
1
answer
3k
views
What is the meaning of each field with the output of `stat` on OSX?
$ stat Cargo.toml
16777220 9094681422 -rw-r--r-- 1 tonytonyjan staff 0 109 "Jan 19 10:05:13 2019" "Dec 31 17:52:29 2018" "Dec 31 17:52:29 2018" "Dec 14 16:32:26 2018" 4096 8 0 Cargo.toml
man stat ...
- 8,636
0
votes
0
answers
57
views
file opened before function call (optimization issue)?
I am trying to understand this better... I have a function in main that is called only when certain conditions are true - inside that function is...
struct stat attr_buff;
if (stat( filename, &...
- 9
1
vote
1
answer
195
views
Is filesize/stat consistent across all filesystems?
I am considering writing software which uses the filesize as pretest to test whether two files are equivalent. There is no need to apply sophisticated file content comparisons if a simple file size ...
- 824
1
vote
1
answer
206
views
Check for file existance and read permissions
I am trying to check if my file specified by file_path exists and is readable. This is my code:
if (stat(file_path,&fileStat) > 0 && (fileStat.st_mode & S_IRUSR))
{
puts("...
- 129
-1
votes
1
answer
168
views
obtain owner name and group from stat function c++
Good day every one. I use function stat on windows to get information from file, but how i can get name from st_uid and st_gid (it's a short).
I use visual stydio 2015
-3
votes
1
answer
1k
views
C - stat struct not working properly [duplicate]
I am trying to printf some characteristics of the files inside a directory (only the ones that start with lowercase). However, when I execute the following code, some of them work and some don't. It ...
1
vote
3
answers
640
views
How to increment a value without any for loop but based on number of times the file is run in PHP
I have a script which, when it runs, creates a new file in some directory. While creating a new file it checks if the file exists:
If it exists it should append 1 to the file name
If another file has ...
- 606
0
votes
0
answers
503
views
stat not recognizing directoies
Hello I´m working on a du implementation that only calculates the size of regular files, so far I got this :
childAnswer* list(char* path){
DIR *directory;
struct dirent *filei;
struct ...
- 138
1
vote
1
answer
44
views
Extract to file duplicate information
I want to create the file with particular name. If it already exists then I want to create another file with the name appended by some number.
For example, I want to create the file log.txt but it is ...
- 321
1
vote
2
answers
170
views
How to count only the number of directories from a path
I am trying to count only the directories from a path, but it doesn't work. So, i don't want to number both files and directories, i want only the directories. Could you help me, please?
The code:
...
- 161
4
votes
2
answers
1k
views
How to get a files last changed time (Unix + Java)
In Unix there is a difference between last changed time and last modifies time. For example when using stat I can get:
Access: 2016-01-18 10:50:01.624303144 +0100
Modify: 2016-01-12 13:34:18....
- 53
1
vote
1
answer
3k
views
Perl: Get the user name and group name from stat commad
Here is the code snippet I am using and I am unable to get the user name and group name for the required file.
#!/usr/bin/perl
use strict;
use Data::Dumper;
use File::stat;
$somedir = '/var/vob/...
- 1,590
2
votes
3
answers
2k
views
How not to open a file twice in linux?
I have a linked list with an fd and a string I used to open this file in each entry. I want to open and add files to this list only if this file is not already opened, because I open and parse this ...
- 460
-2
votes
1
answer
187
views
Linux block size issue
When I run stat for a file test I got the following output.
> [ec2-user@ip-172-31-55-186 ~]$ stat test
> File: ‘test’ Size: 538
> Blocks: 8 IO Block: 4096 regular file ...
- 1,297
13
votes
1
answer
8k
views
On Linux, is access() faster than stat()?
I would have assumed that access() was just a wrapper around stat(), but I've been googling around and have found some anecdotes about replacing stat calls with 'cheaper' access calls. Assuming you ...
- 21.5k
0
votes
1
answer
1k
views
C struct stat info not updating in a loop, giving ridiculous modification date
For one part of a code, I need to save both the name and the stats (user ID, group ID, modification time, permissions, etc.) of every file in a given directory into an array of self-defined structs. ...
- 89
0
votes
1
answer
560
views
stat function returns empty struct [duplicate]
studentsDir = opendir(lineValues);
while ((entry = readdir(studentsDir)) != NULL) {
stat(path, &dirData);
if (S_ISDIR(dirData.st_mode) && (entry->d_name[0] != '.')
&...
- 151
0
votes
1
answer
636
views
Finding the size of a file from stdin gives incorrect number
I am reading a file name off the standard input and the function returns something that is completely wrong. The code below returns 4294967296 rather than what should be 7. I am running the file like ...
- 313
5
votes
1
answer
2k
views
Get a sorted list of folders based on modification date
I am trying to figure out how to apply a Python function to the oldest 50% of the sub-folders inside my parent directory.
For instance, if I have 12 folders inside a directory called foo, I'd ...
- 8,022
10
votes
5
answers
14k
views
What are the advantages of using fstat() vs stat()?
If I have an open file with a known file descriptor, what are the advantages of using fstat(), versus stat()? Why isn't there only one function?
int fstat(int fildes, struct stat *buf)
int stat(...
- 615
3
votes
1
answer
3k
views
How to get file info in Python3 using os.listdir?
I simplified the problem. Now I have only this code:
files = os.listdir(dir_path)
print(files)
for f in files:
info = os.stat(f)
print(info.st_mtime)
Which gives me this error:
OSError: [...
- 10.1k
0
votes
1
answer
158
views
How to hide . and .. folders in C?
I'm trying to list all folders and all files of a folder with the language C.
This is the following code:
#include <errno.h>
#include <stdio.h>
#include <dirent.h>
#include <sys/...
- 1,233
0
votes
1
answer
516
views
When testing a file for readability using stat() do I need to test S_IRUSR, S_IRGRP & S_IROTH?
I'm writing a program using stat to look at file attributes. When testing to see if a file is readable, do I need to test all three modes S_IRUSR, S_IRGRP & S_IROTH or is there a single test for ...
- 786
1
vote
1
answer
2k
views
List files and their info using stat
I am programming an ftp server using c++ and I need to be able to get all info about files in form of :
sent: drwxr-xr-x 1000 ubuntu ubuntu 4096 May 16 11:44 Package-Debug.bash
so I can send it to ...
- 47
-1
votes
1
answer
4k
views
Python: Windows System File
In python, how can I identify a file that is a "window system file". From the command line I can do this with the following command:
ATTRIB "c:\file_path_name.txt"
If the return has the "S" ...
- 1
-3
votes
3
answers
6k
views
how to determine if two file are identical in c using system call
i need to see if 2 files are identical
so i used
struct stat
fdin = open(argv[0],O_RDONLY);
statos= fstat(fdin, &stat);
close(fdin);
fdin = open(argv[1],O_RDONLY);
statos1= ...
- 21
20
votes
4
answers
77k
views
Implementing the ls -al command in C
As a part of an assignment from one of my classes, I have to write a program in C to duplicate the results of the ls -al command. I have read up on the necessary materials but I am still not getting ...
- 203
2
votes
1
answer
1k
views
Read all bytes from a file in c
I'm trying to read bytes from a file, but the size is corrupt. When debugging I can see the value of st.st_size, but I can't read the value of size.
int main(void)
{
FILE* oud;
struct stat st;...
user1502256
-2
votes
1
answer
2k
views
c comparing file sizes using fstat issue
My code comparing 2 file sizes seems to behave as if keyfile > sourcefile. Is there something missing from the code below and what can I change? The two files I'm using for testing are 3kb keyfile and ...
- 652
0
votes
2
answers
6k
views
Modified time using os.stat in Python gets lower when copying files
The issue I am running into is part of using os.stat on a path (Take C:\myfile1.txt for example). When I run os.stat on this file and take the 9th element in the resulting list I get the modified time ...
- 1,251
1
vote
1
answer
433
views
file accessed time in linux using python
This question is a continuation of my question in another thread.Since the point of this question is slightly different,I thought I'd post it as a new question.
I experimented getting accessed time ...
- 8,417
2
votes
3
answers
1k
views
Do I need to fflush or close a file before calling stat on it?
After opening a file for writing:
FILE *file = fopen("./file", "w");
Can I assume the file was created immediately? Is it safe to call:
stat( "./file", info);
Or should I better:
fflush(file);
...
- 1,964