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Top Forums Programming execl() + redirecting output to text files Post 302168225 by JamesGoh on Sunday 17th of February 2008 04:41:14 PM
Old 02-17-2008
Hi guys

I ended up using system() instead and it resolved my probs (although I had to use a lot of strcmp() calls to create the command Smilie ) of redirecting shell output to a file. Another reason why I chose to reject execl() in favour of system() was because I didn't really understand the manual description of it too well (apart from its purpose of course)

pflynn, thanks for your suggestion. Just a question (which may be a bit stupid so bear with me). The standard output is the place where all output of any c program is directed to (i.e. the place where all printf() calls have the text displayed ) ?
 

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NOHUP(1)						    BSD General Commands Manual 						  NOHUP(1)

NAME
nohup -- invoke a utility immune to hangups SYNOPSIS
nohup [--] utility [arguments] DESCRIPTION
The nohup utility invokes utility with its arguments and at this time sets the signal SIGHUP to be ignored. If the standard output is a ter- minal, the standard output is appended to the file nohup.out in the current directory. If standard error is a terminal, it is directed to the same place as the standard output. Some shells may provide a builtin nohup command which is similar or identical to this utility. Consult the builtin(1) manual page. ENVIRONMENT
The following variables are utilized by nohup: HOME If the output file nohup.out cannot be created in the current directory, the nohup utility uses the directory named by HOME to create the file. PATH Used to locate the requested utility if the name contains no '/' characters. EXIT STATUS
The nohup utility exits with one of the following values: 126 The utility was found, but could not be invoked. 127 The utility could not be found or an error occurred in nohup. Otherwise, the exit status of nohup will be that of utility. SEE ALSO
builtin(1), csh(1), signal(3) STANDARDS
The nohup utility is expected to be IEEE Std 1003.2 (``POSIX.2'') compatible. BUGS
Two or more instances of nohup can append to the same file, which makes for a confusing output. BSD
July 19, 2001 BSD
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