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(Environment Access): Adjust comment about setenv() being BSD-only.

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Ulrich Drepper 2001-01-27 08:32:08 +00:00
parent 344be96af4
commit 0423ee1769
2 changed files with 15 additions and 12 deletions
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11
manual/math.texi
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@ -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

16
manual/startup.texi
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@ -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