TIPI wrote:
> i am doing a mail distributor program. It is a little program that
> reads /var/spool/mail/%USERNAME% and write its mails in differents files
> according to a rules file (generally it look at the Sender to know the
> distribution list). I have a skeleton like this:
[snip]
> Here is my questions:
>
> 1. I want to know how can i read a message of the Inbox. Actually a
> read by line with fgets and i look for the "From " line, but when i get
> the next "From " line I know it is a new email. My problem is that file
> pointer of read is in the next line and i don't want it. How can I
> obtain the different messages in a optimal form?.
>
>
> fgets(line,512,fdInbox);
> strcat(email, line);
> while(IsNotFromLine(fgets(line,512,fdInbox))) {
> strcat(email,line);
> }
>
> /* this ends with the first line of the next email in the line
> variable. Then when i invoke next time the function, it not read the
> >From line of the email. */
You can't determine when you've reached the end of a message without
reading the first line (or at least the first 5 bytes) of the next
message. If you don't want the file pointer to be changed, use ftell()
and fseek(), e.g.
int IsFromLine(FILE *fp)
{
char buff[1024];
long pos;
int result;
pos = ftell(fp);
if (pos < 0)
{
perror("IsFromLine: ftell");
return 0;
}
if (!fgets(buff, sizeof(buff), fp))
{
fprintf(stderr, "IsFromLine: fgets error");
return 0;
}
result = (strncmp(buff, "From ", 5) == 0);
fseek(fp, pos, SEEK_SET);
return result;
}
--
Glynn Clements <[EMAIL PROTECTED]>
