running shell command from C++ code problem

[alex chpenst]

Hi,

My program needs to get a list of users on the system. From linux shell it works fine:
# who | cut -d' ' -f1 | sort -u

When I start this from code I get an error with exit code 255. I've read that this means that some libraries can't be found. What libraries are necessary and how and where to declare them for C++ program? Are these libraries for who, cut and sort commands?

QProcess exec;
exec.start( "who|cut -d' ' -f1|sort -u" );
exec.waitForFinished();
int exitcode = exec.exitCode(); // exitcode is always 255!

QProcess exec;
exec.start( "who|cut -d' ' -f1|sort -u" );
exec.waitForFinished();
int exitcode = exec.exitCode(); // exitcode is always 255!

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Thanks!!