diff options
Diffstat (limited to 'bin/sh/sh.1')
| -rw-r--r-- | bin/sh/sh.1 | 34 |
1 files changed, 25 insertions, 9 deletions
diff --git a/bin/sh/sh.1 b/bin/sh/sh.1 index 42e55d3..e318216 100644 --- a/bin/sh/sh.1 +++ b/bin/sh/sh.1 @@ -32,7 +32,7 @@ .\" from: @(#)sh.1 8.6 (Berkeley) 5/4/95 .\" $FreeBSD$ .\" -.Dd May 21, 2011 +.Dd June 18, 2011 .Dt SH 1 .Os .Sh NAME @@ -124,8 +124,8 @@ If the environment variable .Ev ENV is set on entry to a shell, or is set in the .Pa .profile -of a login shell, the shell then reads commands from the file named in -.Ev ENV . +of a login shell, the shell then subjects its value to parameter expansion +and arithmetic expansion and reads commands from the named file. Therefore, a user should place commands that are to be executed only at login time in the .Pa .profile @@ -241,6 +241,10 @@ tested, all commands of the function are considered to be tested as well. .It Fl f Li noglob Disable pathname expansion. +.It Fl h Li trackall +A do-nothing option for +.Tn POSIX +compliance. .It Fl I Li ignoreeof Ignore .Dv EOF Ap s @@ -324,7 +328,7 @@ Useful for debugging. Write each command (preceded by the value of the .Va PS4 -variable) +variable subjected to parameter expansion and arithmetic expansion) to standard error before it is executed. Useful for debugging. .El @@ -372,7 +376,7 @@ The following is a list of valid operators: .It Control operators: .Bl -column "XXX" "XXX" "XXX" "XXX" "XXX" -offset center -compact .It Li & Ta Li && Ta Li ( Ta Li ) Ta Li \en -.It Li ;; Ta Li ; Ta Li | Ta Li || +.It Li ;; Ta Li ;& Ta Li ; Ta Li | Ta Li || .El .It Redirection operators: .Bl -column "XXX" "XXX" "XXX" "XXX" "XXX" -offset center -compact @@ -990,6 +994,11 @@ described later), separated by .Ql \&| characters. +If the selected list is terminated by the control operator +.Ql ;& +instead of +.Ql ;; , +execution continues with the next list. The exit code of the .Ic case command is the exit code of the last command executed in the list or @@ -1536,10 +1545,7 @@ except that the built-in commands and .Ic trap return information about the main shell environment -if they are the only command in a command substitution -and the substitutions in the command cannot cause side effects -(such as from assigning values to variables or referencing -.Li $! ). +if they are the only command in a command substitution. .Ss Arithmetic Expansion Arithmetic expansion provides a mechanism for evaluating an arithmetic expression and substituting its value. @@ -1651,6 +1657,15 @@ matches a rather than introducing a character class. A character class matches any of the characters between the square brackets. A range of characters may be specified using a minus sign. +A named class of characters (see +.Xr wctype 3 ) +may be specified by surrounding the name with +.Ql \&[: +and +.Ql :\&] . +For example, +.Ql \&[\&[:alpha:\&]\&] +is a shell pattern that matches a single letter. The character class may be complemented by making an exclamation point .Pq Ql !\& the first character of the character class. @@ -2575,6 +2590,7 @@ will return the argument. .Xr execve 2 , .Xr getrlimit 2 , .Xr umask 2 , +.Xr wctype 3 , .Xr editrc 5 .Sh HISTORY A |
