NAME

getvfsent, getvfsfile, getvfsspec, getvfsany − get vfstab file entry

SYNOPSIS

#include <stdio.h>
#include <sys/vfstab.h>

int getvfsent (FILE ∗fp, struct vfstab ∗vp);

int getvfsfile (FILE ∗fp, struct vfstab ∗vp, char ∗file);

int getvfsspec (FILE ∗fp, struct vfstab ∗vp, char ∗spec);

int getvfsany (FILE ∗fp, struct vfstab ∗vp, struct vfstab ∗vref);

DESCRIPTION

getvfsent, getvfsfile, getvfsspec, and getvfsany each fill in the structure pointed to by vp with the broken-out fields of a line in the file fp.  Each line in the file contains a vfstab structure, declared in the sys/vfstab.h header file:

char∗vfs_special;
char∗vfs_fsckdev;
char∗vfs_mountp;
char∗vfs_fstype;
char∗vfs_fsckpass;
char∗vfs_automnt;
char∗vfs_mntopts;

The fields have meanings described in vfstab(4). 

getvfsent fills vp with the next vfstab structure in fp so successive calls can be used to search the entire file.  getvfsfile searches the file referenced by fp until a mount point matching file is found and fills vp with the fields from the line in the file.  getvfsspec searches the file referenced by fp until a special device matching spec is found and fills vp with the fields from the line in the file.  spec will try to match on device type (block or character special) and major and minor device numbers.  If it cannot match in this manner, then it compares the strings.  getvfsany searches the file referenced by fp until a match is found between a line in the file and vref.  vref matches the line if all non-null entries in vref match the corresponding fields in the file. 

Lines in fp which are empty or contain a ’#’ in the first column are skipped. 

Note that these routines do not open, close, or rewind the file. 

FILES

/etc/vfstab

DIAGNOSTICS

If the next entry is successfully read by getvfsent or a match is found with getvfsfile, getvfsspec, or getvfsany, 0 is returned.  If an end-of-file is encountered on reading, these functions return −1.  If an error is encountered, a value greater than 0 is returned.  The possible error values are:

VFS_TOOLONG A line in the file exceeded the internal buffer size of VFS_LINE_MAX. 

VFS_TOOMANY A line in the file contains too many fields. 

VFS_TOOFEW A line in the file contains too few fields. 

NOTES

The members of the vfstab structure point to information contained in a static area, so it must be copied if it is to be saved.