src/stat/statvfs.c

   1 #include <sys/statvfs.h>
   2 #include <sys/statfs.h>
   3 #include "syscall.h"
   4 #include "libc.h"
   5
   6 static int __statfs(const char *path, struct statfs *buf)
   7 {
   8         *buf = (struct statfs){0};
   9 #ifdef SYS_statfs64
  10         return syscall(SYS_statfs64, path, sizeof *buf, buf);
  11 #else
  12         return syscall(SYS_statfs, path, buf);
  13 #endif
  14 }
  15
  16 static int __fstatfs(int fd, struct statfs *buf)
  17 {
  18         *buf = (struct statfs){0};
  19 #ifdef SYS_fstatfs64
  20         return syscall(SYS_fstatfs64, fd, sizeof *buf, buf);
  21 #else
  22         return syscall(SYS_fstatfs, fd, buf);
  23 #endif
  24 }
  25
  26 weak_alias(__statfs, statfs);
  27 weak_alias(__fstatfs, fstatfs);
  28
  29 static void fixup(struct statvfs *out, const struct statfs *in)
  30 {
  31         *out = (struct statvfs){0};
  32         out->f_bsize = in->f_bsize;
  33         out->f_frsize = in->f_frsize ? in->f_frsize : in->f_bsize;
  34         out->f_blocks = in->f_blocks;
  35         out->f_bfree = in->f_bfree;
  36         out->f_bavail = in->f_bavail;
  37         out->f_files = in->f_files;
  38         out->f_ffree = in->f_ffree;
  39         out->f_favail = in->f_ffree;
  40         out->f_fsid = in->f_fsid.__val[0];
  41         out->f_flag = in->f_flags;
  42         out->f_namemax = in->f_namelen;
  43 }
  44
  45 int statvfs(const char *restrict path, struct statvfs *restrict buf)
  46 {
  47         struct statfs kbuf;
  48         if (__statfs(path, &kbuf)<0) return -1;
  49         fixup(buf, &kbuf);
  50         return 0;
  51 }
  52
  53 int fstatvfs(int fd, struct statvfs *buf)
  54 {
  55         struct statfs kbuf;
  56         if (__fstatfs(fd, &kbuf)<0) return -1;
  57         fixup(buf, &kbuf);
  58         return 0;
  59 }
  60
  61 LFS64(statvfs);
  62 LFS64(statfs);
  63 LFS64(fstatvfs);
  64 LFS64(fstatfs);