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srogue: add and use more md_* portable functions.

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Privileges and memory usage checks are now more portable.
This commit is contained in:
John "Elwin" Edwards 2014-05-02 15:06:23 -07:00
parent 791df4324f
commit b9cc9cf3a7
6 changed files with 74 additions and 22 deletions
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58
srogue/mdport.c
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@ -413,6 +413,16 @@ md_getuid(void)
#endif
}
gid_t
md_getgid(void)
{
#ifdef HAVE_GETGID
return( getgid() );
#else
return(42);
#endif
}
pid_t
md_getpid(void)
{
@ -1509,3 +1519,51 @@ md_stop_checkout_timer(void)
#endif
long
md_memused(void)
{
#ifdef _WIN32
MEMORYSTATUS stat;
GlobalMemoryStatus(&stat);
return((long)stat.dwTotalPageFile);
#else
return( (long)sbrk(0) );
#endif
}
void
md_droppriv(void)
{
#if defined(HAVE_GETUID)
uid_t realuid = getuid();
#if defined(HAVE_SETRESUID)
if (setresuid(-1, realuid, realuid) != 0) {
#elif defined (HAVE_SETREUID)
if (setreuid(realuid, realuid) != 0) {
#elif defined (HAVE_SETUID)
if (setuid(realuid) != 0) {
#else
if (0) {
#endif
printf("Cannot change to effective uid: %d\n", realuid);
exit(1);
}
#endif
}
extern uid_t playuid;
extern gid_t playgid;
void
md_resetpriv(void)
{
#if defined (HAVE_SETUID)
setuid(playuid);
#endif
#if defined (HAVE_SETGID)
setgid(playgid);
#endif
}