unhash(1) - osol9

1hash(1)                          User Commands                         hash(1)
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NAME

6       hash,  rehash,  unhash,  hashstat - evaluate the internal hash table of
7       the   contents of directories
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SYNOPSIS

10       /usr/bin/hash [utility]
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13       /usr/bin/hash [-r]
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16   sh
17       hash [-r] [name]...
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20   csh
21       rehash
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24       unhash
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27       hashstat
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30   ksh
31       hash [name]...
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34       hash [-r]
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DESCRIPTION

38   /usr/bin/hash
39       The /usr/bin/hash utility affects the way the current shell environment
40       remembers the locations of utilities found.  Depending on the arguments
41       specified, it adds utility locations to its list  of  remembered  loca‐
42       tions  or  it  purges  the  contents of the list. When no arguments are
43       specified, it reports on the contents of the list. The -r option causes
44       the shell to forget all remembered locations.
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47       Utilities provided as built-ins to the shell are not reported by hash.
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49   sh
50       For each name, the location in the search path of the command specified
51       by name is determined and remembered by the shell. The -r option to the
52       hash  built-in  causes the shell to forget all remembered locations. If
53       no arguments are given, hash provides information about remembered com‐
54       mands.  The  Hits column of output is the number of times a command has
55       been invoked by the shell process. The Cost column of output is a  mea‐
56       sure  of the work required to locate a command in the search path. If a
57       command is found in a "relative" directory in the  search  path,  after
58       changing  to  that  directory,  the  stored location of that command is
59       recalculated. Commands for which this will be done are indicated by  an
60       asterisk (*) adjacent to the Hits information. Cost will be incremented
61       when the recalculation is done.
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63   csh
64       rehash recomputes the internal hash table of the contents  of  directo‐
65       ries  listed in the path environmental variable to account for new com‐
66       mands added.
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69       unhash disables the internal hash table.
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72       hashstat prints a statistics line indicating how effective the internal
73       hash  table has been at locating commands (and avoiding execs). An exec
74       is attempted for each component of the path  where  the  hash  function
75       indicates a possible hit and in each component that does not begin with
76       a '/'.
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78   ksh
79       For each name, the location in the search path of the command specified
80       by name is determined and remembered by the shell. The -r option to the
81       hash built-in causes the shell to forget all remembered  locations.  If
82       no arguments are given, hash provides information about remembered com‐
83       mands.
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OPERANDS

86       The following operand is supported by hash:
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88       utility     The name of a utility to be searched for and added  to  the
89                   list of remembered locations.
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OUTPUT

93       The  standard  output  of hash is used when no arguments are specified.
94       Its format is unspecified, but includes the pathname of each utility in
95       the  list  of  remembered  locations for the current shell environment.
96       This list consists of those utilities named in  previous  hash  invoca‐
97       tions  that  have been invoked, and may contain those invoked and found
98       through the normal command search process.
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ENVIRONMENT VARIABLES

101       See environ(5) for descriptions of the following environment  variables
102       that affect the execution of hash: LANG, LC_ALL, LC_CTYPE, LC_MESSAGES,
103       and NLSPATH.
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105       PATH     Determine the location of utility.
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EXIT STATUS

109       The following exit values are returned by hash:
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111       0      Successful completion.
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114       >0     An error occurred.
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ATTRIBUTES

118       See attributes(5) for descriptions of the following attributes:
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123       ┌─────────────────────────────┬─────────────────────────────┐
124       │      ATTRIBUTE TYPE         │      ATTRIBUTE VALUE        │
125       ├─────────────────────────────┼─────────────────────────────┤
126       │Availability                 │SUNWcsu                      │
127       ├─────────────────────────────┼─────────────────────────────┤
128       │Interface Stability          │Standard                     │
129       └─────────────────────────────┴─────────────────────────────┘
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