Thread: popen for linux cmd output

Why don't you do the thing id does by yourself? It will be quite a lot simpler and cleaner. getuid(2) and geteuid(2).

Thanks fronty for your suggestion. Its working with the function getuid(). Is root's uid (0) same in all linux flavours?

Also can some one let's know, why length of ch is 5? why not 4?

fgets() reads in at most one less than size characters from stream and
stores them into the buffer pointed to by s. Reading stops after an
EOF or a newline. If a newline is read, it is stored into the buffer.
A '\0' is stored after the last character in the buffer.

There from man fgets.

Originally Posted by sangamesh

Is root's uid (0) same in all linux flavours?

Super user's uid is 0 on all posix-ish operating systems.