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Top Forums Programming Beginners question about fork Post 302373237 by jim mcnamara on Thursday 19th of November 2009 09:30:26 PM
Old 11-19-2009
Sending email using a command like mailx or sendmail requires a fork/exec on the child
side then wait on the parent side. This is exactly what the system() call does.

The alternative is to do what sendmail does in C code. system("/usr/bin/sendmail ... ") being infinitely simpler. IF you're sending 100K mail messages per day you should incorporate sendmail code, otherwise for a few dozen messages per day, consider system().

Start here to see what sendmail does, it is open source.

Code:
http://www.sendmail.org/

 

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MAILSTATS(8)						      System Manager's Manual						      MAILSTATS(8)

NAME
mailstats - display mail statistics SYNOPSIS
mailstats [-c] [-o] [-p] [-P] [-C cffile] [-f stfile] DESCRIPTION
The mailstats utility displays the current mail statistics. First, the time at which statistics started being kept is displayed, in the format specified by ctime(3). Then, the statistics for each mailer are displayed on a single line, each with the following white space separated fields: M The mailer number. msgsfr Number of messages from the mailer. bytes_from Kbytes from the mailer. msgsto Number of messages to the mailer. bytes_to Kbytes to the mailer. msgsrej Number of messages rejected. msgsdis Number of messages discarded. msgsqur Number of messages quarantined. Mailer The name of the mailer. After this display, a line totaling the values for all of the mailers is displayed (preceded with a ``T''), separated from the previous information by a line containing only equals (``='') characters. Another line preceded with a ``C'' lists the number of TCP connections. The options are as follows: -C Read the specified file instead of the default sendmail configuration file. -c Try to use submit.cf instead of the default sendmail configuration file. -f Read the specified statistics file instead of the statistics file specified in the sendmail configuration file. -P Output information in program-readable mode without clearing statistics. -p Output information in program-readable mode and clear statistics. -o Don't display the name of the mailer in the output. The mailstats utility exits 0 on success, and >0 if an error occurs. FILES
/etc/mail/sendmail.cf The default sendmail configuration file. /var/lib/sendmail/statistics The default sendmail statistics file. /etc/mail/statistics The symbolic link to the statistics file. SEE ALSO
mailq(1), sendmail(8) $Date: 2002/06/27 22:47:29 $ MAILSTATS(8)
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