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authorUlrich Drepper <drepper@redhat.com>2001-01-27 08:32:08 +0000
committerUlrich Drepper <drepper@redhat.com>2001-01-27 08:32:08 +0000
commit0423ee1769597835b9219b4b7a0e2e02e9580d1c (patch)
tree365fde2bcfbe72405e861d856c0a4c0eda0baffe /manual
parent344be96af46b4e8cc79d942db00ae105929a43c2 (diff)
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(Environment Access): Adjust comment about setenv() being BSD-only.
Diffstat (limited to 'manual')
-rw-r--r--manual/math.texi11
-rw-r--r--manual/startup.texi16
2 files changed, 15 insertions, 12 deletions
diff --git a/manual/math.texi b/manual/math.texi
index 9c0552d..a7d6c88 100644
--- a/manual/math.texi
+++ b/manual/math.texi
@@ -1360,14 +1360,15 @@ The prototypes for these functions are in @file{stdlib.h}.
@comment stdlib.h
@comment BSD
-@deftypefun {int32_t} random (void)
+@deftypefun {long int} random (void)
This function returns the next pseudo-random number in the sequence.
The value returned ranges from @code{0} to @code{RAND_MAX}.
-@strong{Note:} Historically this function returned a @code{long int}
-value. On 64-bit systems @code{long int} would have been larger than
-programs expected, so @code{random} is now defined to return exactly 32
-bits.
+@strong{Note:} Temporarily this function was defined to return a
+@code{int32_t} value to indicate that the return value always contains
+32 bits even if @code{long int} is wider. The standard demands it
+differently. Users must always be aware of the 32-bit limitation,
+though.
@end deftypefun
@comment stdlib.h
diff --git a/manual/startup.texi b/manual/startup.texi
index 526d19d..66c4a88 100644
--- a/manual/startup.texi
+++ b/manual/startup.texi
@@ -364,23 +364,25 @@ the old entry is replaced by the new one.
Please note that you cannot remove an entry completely using this function.
-This function is part of the BSD library. The GNU C Library provides
-this function for compatibility but it may not be available on other
-systems.
+This function was originally part of the BSD library but is now part of
+the Unix standard.
@end deftypefun
@comment stdlib.h
@comment BSD
-@deftypefun void unsetenv (const char *@var{name})
+@deftypefun int unsetenv (const char *@var{name})
Using this function one can remove an entry completely from the
environment. If the environment contains an entry with the key
@var{name} this whole entry is removed. A call to this function is
equivalent to a call to @code{putenv} when the @var{value} part of the
string is empty.
-This function is part of the BSD library. The GNU C Library provides
-this function for compatibility but it may not be available on other
-systems.
+The function return @code{-1} if @var{name} is a null pointer, points to
+an empty string, or points to a string containing a @code{=} character.
+It returns @code{0} if the call succeeded.
+
+This function was originall part of the BSD library but is now part of
+the Unix standard. The BSD version had no return value, though.
@end deftypefun
There is one more function to modify the whole environment. This