GNU/Linux man pages
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GNU/Linux |
CentOS 5.3 |
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sysfs(2) |
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sysfs − get file system type information
int sysfs(int option, const char *fsname);
int sysfs(int option, unsigned int fs_index, char *buf);
int sysfs(int option);
sysfs() returns information about the file system types currently present in the kernel. The specific form of the sysfs() call and the information returned depends on the option in effect:
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1 |
Translate the file-system identifier string fsname into a file-system type index. | ||
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2 |
Translate the file-system type index fs_index into a null-terminated file-system identifier string. This string will be written to the buffer pointed to by buf. Make sure that buf has enough space to accept the string. | ||
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3 |
Return the total number of file system types currently present in the kernel. |
The numbering of the file-system type indexes begins with zero.
On success, sysfs() returns the file-system index for option 1, zero for option 2, and the number of currently configured file systems for option 3. On error, −1 is returned, and errno is set appropriately.
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EFAULT |
Either fsname or buf is outside your accessible address space. | ||
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EINVAL |
fsname is not a valid file-system type identifier; fs_index is out-of-bounds; option is invalid. |
SVr4.
On Linux with the proc filesystem mounted on /proc, the same information can be derived from /proc/filesystems.
There is no libc or glibc support. There is no way to guess how large buf should be.
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sysfs(2) | |