1SYSFS(2)                   Linux Programmer's Manual                  SYSFS(2)
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NAME

6       sysfs - get file system type information
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SYNOPSIS

9       int sysfs(int option, const char *fsname);
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11       int sysfs(int option, unsigned int fs_index, char *buf);
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13       int sysfs(int option);
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DESCRIPTION

16       sysfs()  returns  information  about  the  file  system types currently
17       present in the kernel. The specific form of the sysfs()  call  and  the
18       information returned depends on the option in effect:
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21       1      Translate  the file-system identifier string fsname into a file-
22              system type index.
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24       2      Translate the file-system type index fs_index into a null-termi‐
25              nated file-system identifier string. This string will be written
26              to the buffer pointed to by buf.  Make sure that buf has  enough
27              space to accept the string.
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29       3      Return  the  total number of file system types currently present
30              in the kernel.
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33       The numbering of the file-system type indexes begins with zero.
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RETURN VALUE

36       On success, sysfs() returns the file-system index for  option  1,  zero
37       for  option  2, and the number of currently configured file systems for
38       option 3.  On error, -1 is returned, and errno is set appropriately.
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ERRORS

41       EFAULT Either fsname or buf is outside your accessible address space.
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43       EINVAL fsname is not a valid file-system type identifier;  fs_index  is
44              out-of-bounds; option is invalid.
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CONFORMING TO

47       SVr4.
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NOTE

50       On  Linux  with the proc filesystem mounted on /proc, the same informa‐
51       tion can be derived from /proc/filesystems.
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BUGS

54       There is no libc or glibc support.  There is no way to guess how  large
55       buf should be.
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59Linux 1.3.16                      1995-08-09                          SYSFS(2)