man Pages(3): Library Routines
    
H
 
 halfdelay -- enable/disable half-delay mode ( Index Term Link )
 
 halt system processor, -- reboot ( Index Term Link )
 
 has_colors -- manipulate color information ( Index Term Link )
 
 has_ic -- determine insert/delete character/line capability ( Index Term Link )
 
 has_il -- determine insert/delete character/line capability ( Index Term Link )
 
 hash-table search routine, -- hsearch ( Index Term Link )
 
 hasmntopt -- get mnttab file information ( Index Term Link )
 
 have Volume Management check for media -- volmgt_check ( Index Term Link )
 
 hcreate -- create hash table ( Index Term Link )
 
 hdestroy -- destroy hash table ( Index Term Link )
 
 hline -- use single-byte characters (and renditions) to draw lines ( Index Term Link )
 
 hline_set -- use complex characters (and renditions) to draw lines ( Index Term Link )
 
 host ID, get unique identifier of current host -- gethostid ( Index Term Link )
 
 host machines, remote, return information about users -- rusers, rnusers ( Index Term Link )
 
 host name
  get name of current host -- gethostname ( Index Term Link )
  set name of current host -- sethostname ( Index Term Link )
 
 hsearch -- hash-table search routine ( Index Term Link )
 
 hyperbolic cosine function -- cosh ( Index Term Link )
 
 hyperbolic sine function -- sinh ( Index Term Link )
 
 hyperbolic tangent function -- tanh ( Index Term Link )
 
 hypot -- Euclidean distance function ( Index Term Link )