getmntent(3)                                         getmntent(3)



     NAME
          setmntent, getmntent, addmntent, endmntent, hasmntopt -  get
          file system descriptor file entry

     SYNOPSIS
          #include <stdio.h>
          #include <mntent.h>

          FILE *setmntent(filep, type)
          char *filep;
          char *type;

          struct mntent *getmntent(filep)
          FILE *filep;

          int addmntent(filep, mnt)
          FILE *filep;
          struct mntent *mnt;

          char *hasmntopt(mnt, opt)
          struct mntent *mnt;
          char *opt;

          int endmntent(filep)
          FILE *filep;

     DESCRIPTION
          These routines replace the getfsent(3) routines for access-
          ing the file system description file /etc/fstab, and the
          mounted file system description file /etc/mtab.

          setmntent opens a file system description file and returns a
          file pointer for use with getmntent, addmntent, or
          endmntent.  The type argument is the same as in fopen(3).
          getmntent reads the next line from filep and returns a
          pointer to an object with the following structure containing
          broken-out fields of a line in the file system description
          file, <mntent.h>.  The fields have meanings described in
          fstab(4).

          struct mntent {
              char    *mnt_fsname; /* file system name */
              char    *mnt_dir;    /* file system path prefix */
              char    *mnt_type;   /* 4.2, 5.2, nfs, swap, or ignore */
              char    *mnt_opts;   /* ro, rw, quota, noquota, hard, soft */
              int     mnt_freq;    /* dump frequency, in days */
              int     mnt_passno;  /* pass number on parallel fsck */
          };

          addmntent adds the mntent structure mnt to the end of the
          open file filep.  Note that filep has to be opened for writ-
          ing if this is to work.  hasmntopt scans the mnt_opts field



     April, 1990                                                     1

     getmntent(3)                                         getmntent(3)



          of the mntent structure mnt for a substring that matches
          opt.  It returns the address of the substring if a match is
          found, 0 otherwise.  endmntent closes the file.

     RETURN VALUE
          NULL pointer (0) returned on EOF or error.

     FILES
          /etc/fstab
          /etc/mtab

     SEE ALSO
          fstab(4), mtab(4).

     BUGS
          The returned mntent structure points to static information
          that is overwritten in each call.






































     2                                                     April, 1990