void xunlink(char *path);
int xcreate(char *path, int flags, int mode);
int xopen(char *path, int flags);
+int xcreate_stdio(char *path, int flags, int mode);
+int xopen_stdio(char *path, int flags);
+int xopenro(char *path);
void xpipe(int *pp);
void xclose(int fd);
int xdup(int fd);
int readlink0(char *path, char *buf, int len);
int regexec0(regex_t *preg, char *string, long len, int nmatch,
regmatch_t pmatch[], int eflags);
+char *getusername(uid_t uid);
+char *getgroupname(gid_t gid);
#define HR_SPACE 1 // Space between number and units
#define HR_B 2 // Use "B" for single byte units