popen
extern FILE *popen(const char *command, const char *mode);
fd = popen(fortuneFile.String(), "r");
FILE *file = popen("/bin/fortune", "r");
if (!(p = popen(command, "r"))) {
versioned_symbol (libc, __new_popen, popen, GLIBC_2_1);
extern FILE *popen (const char *__command, const char *__modes) __wur;
fPipe = popen(cmdLine.String(), "r");
FILE* f = popen("/bin/bash -c 'for i in 1 2 3; do { echo $i; sleep 1; }; done'", "r");