SYSFSSection: Linux Programmer's Manual (2)
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NAMEsysfs - get file system type information
SYNOPSISint sysfs(int option, const char *fsname);
int sysfs(int option, unsigned int fs_index, char *buf);
DESCRIPTIONsysfs 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:
RETURN VALUEOn 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.
NOTEOn Linux with the proc filesystem mounted on /proc, the same information can be derived from /proc/filesystems.
BUGSThere is no libc or glibc support. There is no way to guess how large buf should be.
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Time: 15:09:12 GMT, July 17, 2018