1DOT(1P) POSIX Programmer's Manual DOT(1P)
2
6 This manual page is part of the POSIX Programmer's Manual. The Linux
7 implementation of this interface may differ (consult the corresponding
8 Linux manual page for details of Linux behavior), or the interface may
9 not be implemented on Linux.
10
12 dot - execute commands in the current environment
13
15 . file
16
18 The shell shall execute commands from the file in the current environ‐
19 ment.
20 If file does not contain a slash, the shell shall use the search path
22 specified by PATH to find the directory containing file. Unlike normal
23 command search, however, the file searched for by the dot utility need
24 not be executable. If no readable file is found, a non-interactive
25 shell shall abort; an interactive shell shall write a diagnostic mes‐
26 sage to standard error, but this condition shall not be considered a
27 syntax error.
28
30 None.
31
33 See the DESCRIPTION.
34
36 Not used.
37
39 See the DESCRIPTION.
40
42 See the DESCRIPTION.
43
45 Default.
46
48 Not used.
49
51 The standard error shall be used only for diagnostic messages.
52
54 None.
55
57 None.
58
60 Returns the value of the last command executed, or a zero exit status
61 if no command is executed.
62
64 Default.
65 The following sections are informative.
67
69 None.
70
72 cat foobar
73 foo=hello bar=world. foobar
74 echo $foo $bar
75 hello world
76
78 Some older implementations searched the current directory for the file,
79 even if the value of PATH disallowed it. This behavior was omitted
80 from this volume of IEEE Std 1003.1-2001 due to concerns about intro‐
81 ducing the susceptibility to trojan horses that the user might be try‐
82 ing to avoid by leaving dot out of PATH.
83 The KornShell version of dot takes optional arguments that are set to
85 the positional parameters. This is a valid extension that allows a dot
86 script to behave identically to a function.
87
89 None.
90
92 Special Built-In Utilities
93
95 Portions of this text are reprinted and reproduced in electronic form
96 from IEEE Std 1003.1, 2003 Edition, Standard for Information Technology
97 -- Portable Operating System Interface (POSIX), The Open Group Base
98 Specifications Issue 6, Copyright (C) 2001-2003 by the Institute of
99 Electrical and Electronics Engineers, Inc and The Open Group. In the
100 event of any discrepancy between this version and the original IEEE and
101 The Open Group Standard, the original IEEE and The Open Group Standard
102 is the referee document. The original Standard can be obtained online
103 at http://www.opengroup.org/unix/online.html .
104IEEE/The Open Group 2003 DOT(1P)