How to construct a string for a Unix system() call from C program -

How to construct a string for a Unix system() call from C program -

i'm trying create c programme run command in unix using system().

can create system("stat myfile"), myfile variable in program? there other way possible?

system() takes pointer-to-char or char array. can build follows:

#include <stdio.h> #include <stdlib.h> char command[256]; /* big plenty "stat " + longest file name. */ char *myfile = "/my/file"; /* ... */ sprintf (command, "stat %s", myfile); system(commmand);

this should going, note hard limit 256 not bullet-proof coding due possible buffer overrun if myfile looooong name. supercalifragilisticexpialidocious file names not unheard of :-) if want pro, next step read snprintf manual , inquire shell getconf _posix_path_max.

c unix command