================
@@ -2211,6 +2221,15 @@ void StdLibraryFunctionsChecker::initFunctionSummaries(
ErrnoNEZeroIrrelevant, GenericFailureMsg)
.ArgConstraint(NotNull(ArgNo(0))));
+ // int pclose(FILE *stream);
+ addToFunctionSummaryMap(
+ "pclose", Signature(ArgTypes{FilePtrTy}, RetType{IntTy}),
+ Summary(NoEvalCall)
+ .Case({ReturnValueCondition(WithinRange, {{0, IntMax}})},
+ ErrnoMustNotBeChecked, GenericSuccessMsg)
+ .Case(ReturnsMinusOne, ErrnoNEZeroIrrelevant, GenericFailureMsg)
+ .ArgConstraint(NotNull(ArgNo(0))));
+
----------------
balazske wrote:
The POSIX documentation does not tell if it is possible to get negative value
from `fclose` other than -1. Because -1 is reserved for indication of error, it
should not be a regular return value (if yes, there should be mentioned that
`errno` is not changed at success, to make detection of error possible). If
negative non-error return value is allowed, it can not be -1.
It looks like that negative return values from the process appear as positive
values like in the example above. The returned value is not the value passed to
`exit`, that can be extracted by `WEXITSTATUS` (see `waitpid`).
https://github.com/llvm/llvm-project/pull/78895
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