source: vis_dev/vis-2.1/share/help/aliasCmd.txt @ 14

Last change on this file since 14 was 11, checked in by cecile, 13 years ago

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2  alias - provide an alias for a command
3     _________________________________________________________________
4
5   alias [-h] [<name> [<string>]]
6
7   The  "alias" command, if given no arguments, will print the definition
8   of all current aliases.
9
10   Given  a  single  argument, it will print the definition of that alias
11   (if any). Given two arguments, the keyword "name" becomes an alias for
12   the  command  string "string", replacing any other alias with the same
13   name.
14
15   Command options:
16
17   -h
18          Print the command usage.
19
20   <name>
21          Alias
22
23   <string>
24          Command string
25
26   It  is  possible  to  create  aliases that take arguments by using the
27   history  substitution  mechanism.  To protect the history substitution
28   character  `%'  from immediate expansion, it must be preceded by a `\'
29   when entering the alias.
30
31   For example:
32
33   vis> alias read read_\%:1 \%:2.\%:1
34   vis> read blif lion
35 
36
37   will create an alias `read', execute "read_blif lion.blif".
38
39   And...
40
41  vis> alias echo2 "echo Hi ; echo \%* !"
42  vis> echo2 happy birthday
43 
44
45   will print:
46
47  Hi
48  happy birthday !
49 
50
51   CAVEAT:  Currently  there  is  no  check to see if there is a circular
52   dependency in the alias definition. e.g.
53
54  vis> alias foo "print_network_stats; print_network; foo"
55 
56
57   creates  an  alias which refers to itself. Executing the command "foo"
58   will   result   an   infinite   loop   during   which   the   commands
59   "print_network_stats" and "print_network" will be executed.
60     _________________________________________________________________
61
62   Last updated on 20050519 10h16
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