HP-UX Reference (11i v3 07/02) - 2 System Calls (vol 5)

s
sysfs(2) sysfs(2)
NAME
sysfs - get file system type information
SYNOPSIS
#include <sys/fstyp.h>
int sysfs(int opcode, const char *fsname);
int sysfs(int opcode, int fs_index, char *buf );
int sysfs(int opcode);
DESCRIPTION
sysfs is used to return information about the file system types configured in the system. The number
arguments accepted by sysfs varies and depends on the opcode.
The current recognized opcodes and their functions are:
GETFSIND Translate fsname, a null-terminated file-system type identifier, into a file-system type
index.
GETFSTYP Translate fs_index, a file-system type index, into a null-terminated file-system type
identifier and write it into the buffer pointed to by buf; this buffer must be at least of
size
FSTYPSZ as defined in <sys/fstyp.h>.
If there is no file-system type
configured at fs_index, a null string is returned for the file-system type identifier.
GETNFSTYP Return one more than the largest file system type configured. This is not the number
of file system types configured, because the type numbers may not be contiguous. See
the example below.
RETURN VALUE
Upon successful completion,
sysfs() returns the file-system type index if the opcode is GETFSIND,a
value of 0 if the opcode is
GETFSTYP, or the number of file system types configured if the opcode is
GETNFSTYP. Otherwise, a value of -1 is returned and errno is set to indicate the error.
ERRORS
sysfs fails if one or more of the following are true and sets errno to the value indicated:
[EINVAL] fsname points to an invalid file-system identifier; fs_index is negative or greater than the
largest file-system type index; opcode is invalid.
[EFAULT] buf or fsname points to an invalid user address.
EXAMPLES
List the filesystem types configured in the system.
#include <sys/fstyp.h>
int max_type, error, i;
char name[FSTYPSZ];
max_type = sysfs(GETNFSTYP);
for (i = 0; i < max_type; i++) {
error = sysfs(GETFSTYP, i, name);
if (error == 0)
my_print(name);
}
488 Hewlett-Packard Company − 1 − HP-UX 11i Version 3: February 2007