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Top Forums UNIX for Dummies Questions & Answers problem using execl to start a tftp process Post 302594900 by Corona688 on Wednesday 1st of February 2012 12:14:33 PM
Old 02-01-2012
execl does not start a new process. It completely replaces the current process. If it succeeds, your else clause won't ever run!

You are missing a /.

Code:
if (execl("/usr/bin/tftp", "tftp", "-4", ip_addr, "-c", "get", "myfile.txt", NULL) == -1)

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

NAME
tftpd - DARPA Trivial File Transfer Protocol server SYNOPSIS
tftpd [ directory ... ] DESCRIPTION
Tftpd is a server which supports the DARPA Trivial File Transfer Protocol. The TFTP server operates at the port indicated in the ``tftp'' service description; see services(5). The server is normally started by inetd(8). The use of tftp does not require an account or password on the remote system. Due to the lack of authentication information, tftpd will allow only publicly readable files to be accessed. Files may be written only if they already exist and are publicly writable. Note that this extends the concept of ``public'' to include all users on all hosts that can be reached through the network; this may not be appropri- ate on all systems, and its implications should be considered before enabling tftp service. The server should have the user ID with the lowest possible privilege. Access to files may be restricted by invoking tftpd with a list of directories by including pathnames as server program arguments in /etc/inetd.conf. In this case access is restricted to files whose names are prefixed by the one of the given directories. SEE ALSO
tftp(1), inetd(8) 4.2 Berkeley Distribution June 24, 1990 TFTPD(8)
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