why the text is in unreadable format.

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Hi All,
I am new to Linux programming, wrote an file writing program,the file is created but the text is file is not in readable format can anyone tell why?
Here is the program

C++

#include <stdio.h>
#include <stdlib.h>
#include <fcntl.h>
#include <errno.h>
#include <sys/types.h>
#include <unistd.h>

#define BUF_SIZE

int main()
{
int fd;
char* buffer = "hi";
fd = open("/home/abc/Desktop/log.txt", O_WRONLY | O_CREAT | O_APPEND,777);
 ssize_t out = write (fd,;this is me",12);
printf("value of out is %d",out);
close(fd);
}

Posted 3-Aug-13 2:44am

Robert Clove

Updated 3-Aug-13 3:26am

André Kraak

v2

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OriginalGriff · Answer 1 · 2013-08-03T03:37:00

Solution 1

Probably, because your program doesn't compile, and thus doesn't produce an EXE file. So exactly what you are running to create the file, I don't know...

Try changing:

C++

ssize_t out = write (fd,;this is me",12);

To

C++

ssize_t out = write (fd,"this is me",12);

It may not work - I haven't tested it - but at least it will compile and produce an EXE file...

Posted 3-Aug-13 3:37am

OriginalGriff

Comments

Robert Clove 3-Aug-13 11:42am

ya but the text in the file is not in readable format,

OriginalGriff 3-Aug-13 12:08pm

So what does it look like? Have you looked at it with a hex editor?

Robert Clove 3-Aug-13 12:31pm

not with hex editor but the txt file should be normal readable.

OriginalGriff 3-Aug-13 12:39pm

So the first step is to find out what you do have - that should give clues as to why it isn't readable...

Robert Clove 3-Aug-13 12:41pm

i have written the above code with this line ssize_t out = write (fd,"this is me",12);

OriginalGriff 3-Aug-13 13:27pm

Yes, I guessed that... What do you get in the file?

Robert Clove 3-Aug-13 13:55pm

桴獩椠⁳敭瘀 this is mine output

Robert Clove 3-Aug-13 13:55pm

桴獩椠⁳敭瘀 mine output of program

OriginalGriff 4-Aug-13 4:04am

So, you need to look at it in something other than a text editor!
That is about as useful as just saying "not in readable format" - you (and I) need to know what actual values are being written to the file.
See if your text editor has a Hex mode, or download one that does (I use PSPad for Windows, and it has both text and Hex modes)

Robert Clove 4-Aug-13 5:23am

Sir one more thing i want to ask you,i have an application (in Linux) with source code when i run the application the GUI appears i want to debug the application by debug mean when i press some button on the GUI what code the application executes, any idea how can i debug the application.

OriginalGriff 4-Aug-13 5:37am

I can't tell is that is possible in your system, because I have no idea what development environment your are using: in Windows it's pretty easy, because the compiler is integrated with the debugger so you never leave the same program. But it doesn't have to be that way - if you are using GCC directly for example, then there is no debugger involved!