-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1
On Thu, 10 Apr 2003 12:01:24 +0530, Ajay Bansal wrote:
> Following program is not working on linux. Ideally it should read all
> the lines from "/tmp/log.txt" and print them on to the screen.
The given source code example does not match this description.
Apart from that it would not even compile, because you forgot
to include a few headers.
> Instead
> it breals after it encounters fgets for the first time.
> Pleas tell me where I am going wrong!!!! This program is working as
> expected on a Solaris machine.
I doubt that. See below.
> Entries in log.txt
> ------------------
> Line1
> Line2
> Line3
> ------------------
>
> Output of the program
> ---------------------
> [ajay@xxxxxx test]$ ./a.out
> Fileno is :3
> Error no is : 0
> Error is : Success
> Line read is :
> after fgets break outside while loop
> ---------------------
>
> #include <iostream>
> #include <fstream>
> #include <errno.h>
> #include <stdlib.h>
> using namespace std;
> int main()
> {
> char * pszFileName = "/tmp/log.txt";
> char * pszMode = "a+";
!!!
> char lpsz[4096];
> FILE *pFile = fopen(pszFileName, pszMode);
Due to pszMode above, this opens the file at the end.
Therefore it doesn't read the contents of the file.
> while (!feof(pFile)) {
> if (! fgets(lpsz, 4096, pFile))
> {
> cout<<"Error no is : "<<errno<<endl;
> cout<<"Error is : "<<strerror(errno)<<endl;
> cout<<"Line read is : "<<lpsz<<endl;
> break;
> }
> cout<<"Line read is : "<<lpsz<<endl;
> cout <<" after fgets break inside while loop"<<endl;
> }
>
> cout <<" after fgets break outside while loop"<<endl;
>
> return 1;
> }
- --
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.0.7 (GNU/Linux)
iD8DBQE+lSRk0iMVcrivHFQRAllEAJ0U2eg6IHkzYbQhxgn0OFrx33Qi1gCeMqfu
jFzgzvVBpOq2oi2J+nRIdkY=
=IfMm
-----END PGP SIGNATURE-----
_______________________________________________
Redhat-devel-list mailing list
Redhat-devel-list@xxxxxxxxxx
https://listman.redhat.com/mailman/listinfo/redhat-devel-list
