src/stat/statvfs.c

   1 #include <sys/statvfs.h>
   2 #include <sys/statfs.h>
   3 #include "syscall.h"
   4
   5 static int __statfs(const char *path, struct statfs *buf)
   6 {
   7         *buf = (struct statfs){0};
   8 #ifdef SYS_statfs64
   9         return syscall(SYS_statfs64, path, sizeof *buf, buf);
  10 #else
  11         return syscall(SYS_statfs, path, buf);
  12 #endif
  13 }
  14
  15 static int __fstatfs(int fd, struct statfs *buf)
  16 {
  17         *buf = (struct statfs){0};
  18 #ifdef SYS_fstatfs64
  19         return syscall(SYS_fstatfs64, fd, sizeof *buf, buf);
  20 #else
  21         return syscall(SYS_fstatfs, fd, buf);
  22 #endif
  23 }
  24
  25 weak_alias(__statfs, statfs);
  26 weak_alias(__fstatfs, fstatfs);
  27
  28 static void fixup(struct statvfs *out, const struct statfs *in)
  29 {
  30         *out = (struct statvfs){0};
  31         out->f_bsize = in->f_bsize;
  32         out->f_frsize = in->f_frsize ? in->f_frsize : in->f_bsize;
  33         out->f_blocks = in->f_blocks;
  34         out->f_bfree = in->f_bfree;
  35         out->f_bavail = in->f_bavail;
  36         out->f_files = in->f_files;
  37         out->f_ffree = in->f_ffree;
  38         out->f_favail = in->f_ffree;
  39         out->f_fsid = in->f_fsid.__val[0];
  40         out->f_flag = in->f_flags;
  41         out->f_namemax = in->f_namelen;
  42 }
  43
  44 int statvfs(const char *restrict path, struct statvfs *restrict buf)
  45 {
  46         struct statfs kbuf;
  47         if (__statfs(path, &kbuf)<0) return -1;
  48         fixup(buf, &kbuf);
  49         return 0;
  50 }
  51
  52 int fstatvfs(int fd, struct statvfs *buf)
  53 {
  54         struct statfs kbuf;
  55         if (__fstatfs(fd, &kbuf)<0) return -1;
  56         fixup(buf, &kbuf);
  57         return 0;
  58 }
  59
  60 weak_alias(statvfs, statvfs64);
  61 weak_alias(statfs, statfs64);
  62 weak_alias(fstatvfs, fstatvfs64);
  63 weak_alias(fstatfs, fstatfs64);