diff options
Diffstat (limited to '')
| -rw-r--r-- | man3/clearenv.3 | 23 |
1 files changed, 11 insertions, 12 deletions
diff --git a/man3/clearenv.3 b/man3/clearenv.3 index 1c91402..3ffd761 100644 --- a/man3/clearenv.3 +++ b/man3/clearenv.3 @@ -4,7 +4,7 @@ .\" SPDX-License-Identifier: Linux-man-pages-copyleft .\" .\" Additions, aeb, 2001-10-17. -.TH clearenv 3 2023-07-20 "Linux man-pages 6.05.01" +.TH clearenv 3 2023-10-31 "Linux man-pages 6.7" .SH NAME clearenv \- clear the environment .SH LIBRARY @@ -13,15 +13,15 @@ Standard C library .SH SYNOPSIS .nf .B #include <stdlib.h> -.PP +.P .B "int clearenv(void);" .fi -.PP +.P .RS -4 Feature Test Macro Requirements for glibc (see .BR feature_test_macros (7)): .RE -.PP +.P .BR clearenv (): .nf /* glibc >= 2.19: */ _DEFAULT_SOURCE @@ -59,7 +59,6 @@ T{ .BR clearenv () T} Thread safety MT-Unsafe const:env .TE -.sp 1 .SH STANDARDS .TP .BR putenv () @@ -75,7 +74,7 @@ POSIX.1-2001. .TP .BR clearenv () glibc 2.0. -.PP +.P Various UNIX variants (DG/UX, HP-UX, QNX, ...). POSIX.9 (bindings for FORTRAN77). POSIX.1-1996 did not accept @@ -93,15 +92,15 @@ and rejected On systems where .BR clearenv () is unavailable, the assignment -.PP +.P .in +4n .EX environ = NULL; .EE .in -.PP +.P will probably do. -.PP +.P The .BR clearenv () function may be useful in security-conscious applications that want to @@ -110,14 +109,14 @@ executed using .BR exec (3). The application would do this by first clearing the environment and then adding select environment variables. -.PP +.P Note that the main effect of .BR clearenv () is to adjust the value of the pointer .BR environ (7); this function does not erase the contents of the buffers containing the environment definitions. -.PP +.P The DG/UX and Tru64 man pages write: If .I environ has been modified by anything other than the @@ -128,7 +127,7 @@ or functions, then .BR clearenv () will return an error and the process environment will remain unchanged. -.\" .LP +.\" .P .\" HP-UX has a ENOMEM error return. .SH SEE ALSO .BR getenv (3), |