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Diffstat (limited to 'manual/startup.texi')
| -rw-r--r-- | manual/startup.texi | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/manual/startup.texi b/manual/startup.texi index 93dca303ca..ed75e7bdc3 100644 --- a/manual/startup.texi +++ b/manual/startup.texi @@ -335,6 +335,9 @@ definition is added to the environment. Otherwise, the @var{string} is interpreted as the name of an environment variable, and any definition for this variable in the environment is removed. +If the function is successful it returns @code{0}. Otherwise the return +value is nonzero and @code{errno} is set to indicate the error. + The difference to the @code{setenv} function is that the exact string given as the parameter @var{string} is put into the environment. If the user should change the string after the @code{putenv} call this will @@ -364,6 +367,10 @@ the old entry is replaced by the new one. Please note that you cannot remove an entry completely using this function. +If the function is successful it returns @code{0}. Otherwise the +environment is unchanged and the return value is @code{-1} and +@code{errno} is set. + This function was originally part of the BSD library but is now part of the Unix standard. @end deftypefun |