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sysfs(2) System Calls Manual sysfs(2) NAME sysfs - gather information about file system types SYNOPSIS #include <sys/fstyp.h> #include <sys/fsid.h> int sysfs ( int opcode, const char *fsname ); int sysfs ( int opcode, int fs_index, char *buf ); int sysfs ( int opcode ); PARAMETERS Points to the buffer where the file system type is placed. The buffer size must be equal to FSTYPSZ as defined in <sys/fstyp.h>. Specifies an index file system type. Specifies a null-terminated file system type identifier. Specifies an operation used to obtain information about the file system types. DESCRIPTION This function gathers information about configured file system types. Depending on the operation you want to perform, the opcode parameter may be specified by itself, or in combination with the other available parameters as shown in the SYNOPSIS section. The opcode parameter may be one of the following: Must be specified with the fsname parameter. This operation changes the specified null- terminated file system type identifier to a file system type identi- fier. Must be specified with the parameters fs_index and buf. This operation changes the specified file system type index to a null-termi- nated type file system type identifier and writes it into the buffer specified. Specified by itself, this operation requests the total num- ber of file system types configured in the system to be returned. RETURN VALUES The following values are returned on success: If GETFSIND is specified, the file system type index is returned. If GETFSTYP is specified, a value of zero (0) is returned. If GETNFSTYP is specified, the number of file system types configured in the system is returned. On error, a value of -1 is returned and errno is set. ERRORS One or more of the following may be returned on failure: Indicates an invalid file system identifier is pointed to fsname, the specified fs_index is either zero (0) or invalid, or the specified opcode is in- valid. Indicates that either fsname or buf is pointing to an invalid user address. Indicates that a file system was installed with a name that exceeds the buffer size of FSTYPSZ. delim off sysfs(2)