This comes up all too often. Windows has text files. Unix does not. Unix is not Windows. In Unix a file is a file is a file. It's a bag of bytes. Period.
Because a standard C string uses ASCII zero (nul character) as the end of string, that data from files that contain nuls (in Windows these are binary files, in Unix they are just files) cannot be parsed as strings because the nuls confuse everything.
To the OP: try
to find out what is in the file. Then you will know if you can read it using standard string C calls like fgets(). Or if you will have to use fread().
After you've programmed for a while you tend to bypass fread and fgets, especially when you're dealing with large files that may contain interesting stuff.
This reads an entire file containing anything into a buffer:
This User Gave Thanks to jim mcnamara For This Post:
Hi,
Please can any one tell me how to convert binary data to text format and vice versa.
If possible give me the algorithm or C program.
Thanks in advance
Waiting for reply
Bye:o (5 Replies)
Hello,
How to i determine via ftp commandline if files on ftp server is ascii or binary files. Like every other comon windows ftp program does it automatically.
regards
Thomas (5 Replies)
Hi
I have a file which has ascii , binary, binary decimal coded,decimal & hexadecimal data with lot of special characters (like öƒ.ƒ.„İİ¡Š·œƒ.„İİ¡Š· ) in it. I want to standardize the file into ASCII format & later use that as source .
Can any one suggest a way a logic to convert such... (5 Replies)
I want to verify the file is Binary or ascii file and accordingly I want to switch the program with ret code
ie 0 or success and 1 for failure
Can any one help me is this a correct syntex...i am getting error
#!/bin/ksh
$file filename
if
echo "ascii fie Found"
else
echo " binary... (6 Replies)
Hi all,
I have been trying to convert a binary file to TEXT/ASCII file in linux/solaries.and commands like string are no good.Also i am not sure how the how output of the file looks like...
I am attaching the binary file as zip since i couldnt load it in its original form in the post incase... (1 Reply)
Hello *nix specialists,
Im working for a non profit organisation in Germany to transport DSL over WLAN to people in areas without no DSL. We are using Linksys WRT 54 router with DD-WRT firmware There are at the moment over 180 router running but we have to change some settings next time. So my... (7 Replies)
what is the diff between ascii and binary file.
my understand is that..
ascii file - has only line feed - \n in it
where as
binary file - has both line feed and carriage return in it- \r\n
is that correct.
also,what is the ksh command to identify whether it is a binary or ascii... (1 Reply)
Hi All,
Need your help!!
I have particular host file with below format:
172.34.45.67 Host1 Host2
134.45.56.67 Host3 Host4 Host5
I need shell script snippet which read this file and change the format of the file to the below format
172.34.45.67 Host1
172.34.45.67 ... (9 Replies)
Hi All,
I have a binary file which is being exported from a Database, and i need to convert that to ASCII format. How can i achieve that? And this solution should work for any file which is given to us; means they will give different files from different tables.
Thanks in advance. (8 Replies)
I need to convert a binary file which in encoded using base32 encoding technique and convert that into readible ASCII so that i can load the same in DB.
is there any command to do the same.
sample from the binary file lools like :
... (18 Replies)
Discussion started by: krk
18 Replies
LEARN ABOUT OPENDARWIN
getline
GETLINE(3) Linux Programmer's Manual GETLINE(3)NAME
getline, getdelim - delimited string input
SYNOPSIS
#include <stdio.h>
ssize_t getline(char **lineptr, size_t *n, FILE *stream);
ssize_t getdelim(char **lineptr, size_t *n, int delim, FILE *stream);
Feature Test Macro Requirements for glibc (see feature_test_macros(7)):
getline(), getdelim():
Since glibc 2.10:
_POSIX_C_SOURCE >= 200809L
Before glibc 2.10:
_GNU_SOURCE
DESCRIPTION
getline() reads an entire line from stream, storing the address of the buffer containing the text into *lineptr. The buffer is null-termi-
nated and includes the newline character, if one was found.
If *lineptr is set to NULL and *n is set 0 before the call, then getline() will allocate a buffer for storing the line. This buffer should
be freed by the user program even if getline() failed.
Alternatively, before calling getline(), *lineptr can contain a pointer to a malloc(3)-allocated buffer *n bytes in size. If the buffer is
not large enough to hold the line, getline() resizes it with realloc(3), updating *lineptr and *n as necessary.
In either case, on a successful call, *lineptr and *n will be updated to reflect the buffer address and allocated size respectively.
getdelim() works like getline(), except that a line delimiter other than newline can be specified as the delimiter argument. As with get-
line(), a delimiter character is not added if one was not present in the input before end of file was reached.
RETURN VALUE
On success, getline() and getdelim() return the number of characters read, including the delimiter character, but not including the termi-
nating null byte ('