diff options
Diffstat (limited to 'man7/environ.7')
| -rw-r--r-- | man7/environ.7 | 26 |
1 files changed, 13 insertions, 13 deletions
diff --git a/man7/environ.7 b/man7/environ.7 index 345b350..cb7a839 100644 --- a/man7/environ.7 +++ b/man7/environ.7 @@ -12,7 +12,7 @@ .\" Modified Wed Jan 24 06:37:24 2001 by Eric S. Raymond (esr@thyrsus.com) .\" Modified Thu Dec 13 23:53:27 2001 by Martin Schulze <joey@infodrom.org> .\" -.TH environ 7 2023-02-05 "Linux man-pages 6.05.01" +.TH environ 7 2023-10-31 "Linux man-pages 6.7" .SH NAME environ \- user environment .SH SYNOPSIS @@ -32,7 +32,7 @@ When a child process is created via it inherits a .I copy of its parent's environment. -.PP +.P By convention, the strings in .I environ have the form "\fIname\fP\fB=\fP\fIvalue\fP". @@ -41,7 +41,7 @@ the character "\fB=\fP". The value can be anything that can be represented as a string. The name and the value may not contain an embedded null byte (\[aq]\e0\[aq]), since this is assumed to terminate the string. -.PP +.P Environment variables may be placed in the shell's environment by the .I export command in @@ -50,7 +50,7 @@ or by the .I setenv command if you use .BR csh (1). -.PP +.P The initial environment of the shell is populated in various ways, such as definitions from .I /etc/environment @@ -63,21 +63,21 @@ In addition, various shell initialization scripts, such as the system-wide script and per-user initializations script may include commands that add variables to the shell's environment; see the manual page of your preferred shell for details. -.PP +.P Bourne-style shells support the syntax -.PP +.P .in +4n .EX NAME=value command .EE .in -.PP +.P to create an environment variable definition only in the scope of the process that executes .IR command . Multiple variable definitions, separated by white space, may precede .IR command . -.PP +.P Arguments may also be placed in the environment at the point of an .BR exec (3). @@ -87,7 +87,7 @@ A C program can manipulate its environment using the functions .BR setenv (3), and .BR unsetenv (3). -.PP +.P What follows is a list of environment variables typically seen on a system. This list is incomplete and includes only common variables seen @@ -194,7 +194,7 @@ command shall be valid. .\" .B BROWSER .\" The user's preferred utility to browse URLs. Sequence of colon-separated .\" browser commands. See http://www.catb.org/\[ti]esr/BROWSER/ . -.PP +.P Note that the behavior of many programs and library routines is influenced by the presence or value of certain environment variables. Examples include the following: @@ -272,14 +272,14 @@ if the .B _GNU_SOURCE feature test macro is defined (see .BR feature_test_macros (7)). -.PP +.P The .BR prctl (2) .B PR_SET_MM_ENV_START and .B PR_SET_MM_ENV_END operations can be used to control the location of the process's environment. -.PP +.P The .BR HOME , .BR LOGNAME , @@ -305,7 +305,7 @@ Clearly there is a security risk here. Many a system command has been tricked into mischief by a user who specified unusual values for .BR IFS " or " LD_LIBRARY_PATH . -.PP +.P There is also the risk of name space pollution. Programs like .I make |