diff options
Diffstat (limited to 'doc')
| -rw-r--r-- | doc/sh-utils.texi | 24 |
1 files changed, 12 insertions, 12 deletions
diff --git a/doc/sh-utils.texi b/doc/sh-utils.texi index 6b9376c8a..d1b09f002 100644 --- a/doc/sh-utils.texi +++ b/doc/sh-utils.texi @@ -797,7 +797,7 @@ This makes it possible to test @code{expr length quote "$x"} or @code{expr quote "$x" : '.*/\(.\)'} and have it do the right thing even if the value of @var{$x} happens to be (for example) @code{/} or @code{index}. This operator is a GNU extension. It is disabled when -the environment variable @var{POSIXLY_CORRECT} is set. +the environment variable @env{POSIXLY_CORRECT} is set. @end table @@ -1749,7 +1749,7 @@ Tell the kernel that the terminal has @var{n} columns. Non-POSIX. @vindex COLUMNS Print the number of rows and columns that the kernel thinks the terminal has. (Systems that don't support rows and cols in the kernel -typically use the environment variables @code{LINES} and @code{COLUMNS} +typically use the environment variables @env{LINES} and @env{COLUMNS} instead; however, GNU @code{stty} does not know anything about them.) Non-POSIX. @@ -2690,7 +2690,7 @@ Ordinarily, filenames are looked up starting at the root of the directory structure, i.e., @file{/}. @code{chroot} changes the root to the directory @var{newroot} (which must exist) and then runs @var{command} with optional @var{args}. If @var{command} is not -specified, the default is the value of the @code{SHELL} environment +specified, the default is the value of the @env{SHELL} environment variable or @code{/bin/sh} if not set, invoked with the @samp{-i} option. The only options are @samp{--help} and @samp{--version}. @xref{Common @@ -2720,7 +2720,7 @@ to an empty value is different from unsetting it. @vindex PATH The first remaining argument specifies the program name to invoke; it is -searched for according to the @code{PATH} environment variable. Any +searched for according to the @env{PATH} environment variable. Any remaining arguments are passed as arguments to that program. @cindex environment, printing @@ -2864,9 +2864,9 @@ effective user id of zero (the super-user). @vindex LOGNAME @cindex login shell By default, @code{su} does not change the current directory. -It sets the environment variables @code{HOME} and @code{SHELL} +It sets the environment variables @env{HOME} and @env{SHELL} from the password entry for @var{user}, and if @var{user} is not -the super-user, sets @code{USER} and @code{LOGNAME} to @var{user}. +the super-user, sets @env{USER} and @env{LOGNAME} to @var{user}. By default, the shell is not a login shell. Any additional @var{arg}s are passed as additional arguments to the @@ -2917,10 +2917,10 @@ expansion (globbing), which is not likely to be useful. @vindex PATH @cindex login shell, creating Make the shell a login shell. This means the following. Unset all -environment variables except @code{TERM}, @code{HOME}, and @code{SHELL} -(which are set as described above), and @code{USER} and @code{LOGNAME} +environment variables except @env{TERM}, @env{HOME}, and @env{SHELL} +(which are set as described above), and @env{USER} and @env{LOGNAME} (which are set, even for the super-user, as described above), and set -@code{PATH} to a compiled-in default value. Change to @var{user}'s home +@env{PATH} to a compiled-in default value. Change to @var{user}'s home directory. Prepend @samp{-} to the shell's name, intended to make it read its login startup file(s). @@ -2933,9 +2933,9 @@ read its login startup file(s). @cindex environment, preserving @flindex /etc/shells @cindex restricted shell -Do not change the environment variables @code{HOME}, @code{USER}, -@code{LOGNAME}, or @code{SHELL}. Run the shell given in the environment -variable @code{SHELL} instead of the shell from @var{user}'s passwd +Do not change the environment variables @env{HOME}, @env{USER}, +@env{LOGNAME}, or @env{SHELL}. Run the shell given in the environment +variable @env{SHELL} instead of the shell from @var{user}'s passwd entry, unless the user running @code{su} is not the superuser and @var{user}'s shell is restricted. A @dfn{restricted shell} is one that is not listed in the file @file{/etc/shells}, or in a compiled-in list |