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/* COVERAGE: gethostname uname sethostname */
#define _BSD_SOURCE
#define _DEFAULT_SOURCE
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/utsname.h>
#include <sys/syscall.h>
#define HLEN 1024
int main()
{
char orig_hname[HLEN];
char *new_hname = "stap_test";
int rc;
struct utsname uts;
/* glibc likes to substitute utsname() for gethostname(). So,
* let's force gethostname()'s use (assuming the syscall actually
* exists on this platform). */
#ifdef __NR_gethostname
syscall(__NR_gethostname, orig_hname, sizeof(orig_hname));
//staptest// gethostname (XXXX, NNNN) = 0
syscall(__NR_gethostname, -1, sizeof(orig_hname));
//staptest// gethostname (0x[f]+, NNNN) = -NNNN
syscall(__NR_gethostname, orig_hname, -1);
//staptest// gethostname (XXXX, -1) = -NNNN
#endif
uname(&uts);
//staptest// uname (XXXX) = 0
uname((struct utsname *)-1);
#ifdef __s390__
//staptest// uname (0x[7]?[f]+) = -NNNN
#else
//staptest// uname (0x[f]+) = -NNNN
#endif
sethostname((char *)-1, sizeof(new_hname));
#ifdef __s390__
//staptest// sethostname (0x[7]?[f]+, NNNN) = -NNNN
#else
//staptest// sethostname (0x[f]+, NNNN) = -NNNN
#endif
sethostname(NULL, -1);
//staptest// sethostname (0x0, -1) = -NNNN
// Notice we aren't calling sethostname() so that it will
// succeed. This is on purpose, since we can't guarentee that
// uname()/gethostname() returns exactly what sethostname() wants
// (and the machine may have more than one name if it has more
// than one interface).
return 0;
}
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