mirror of
https://github.com/jart/cosmopolitan.git
synced 2025-02-01 03:53:33 +00:00
9c6d78c26d
The C standard states:
> The fprintf function returns the number of characters transmitted,
> or a negative value if an output or encoding error occurred or if
> the implementation does not support a specified width length
> modifier.
- C Standard, 7.23.6.1.15. The fprintf function
However, cosmopolitan fails to return a negative value in the case of
an output error, meaning that a program such as:
#include <stdio.h>
int main()
{
FILE *fp = fopen("/dev/full", "w");
setbuf(fp, NULL);
printf("fprintf: %d\n", fprintf(fp, "test\n"));
printf("fflush: %d\n", fflush(fp));
}
will, under cosmopolitan, print that no error occured in either of the
calls to fprintf and fflush.
This patch fixes this, along with the associated GitHub issue,
https://github.com/jart/cosmopolitan/issues/784
64 lines
1.7 KiB
Makefile
64 lines
1.7 KiB
Makefile
#-*-mode:makefile-gmake;indent-tabs-mode:t;tab-width:8;coding:utf-8-*-┐
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#───vi: set et ft=make ts=8 tw=8 fenc=utf-8 :vi───────────────────────┘
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PKGS += TEST_LIBC_FMT
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TEST_LIBC_FMT_SRCS := $(wildcard test/libc/fmt/*.c)
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TEST_LIBC_FMT_SRCS_TEST = $(filter %_test.c,$(TEST_LIBC_FMT_SRCS))
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TEST_LIBC_FMT_BINS = $(TEST_LIBC_FMT_COMS) $(TEST_LIBC_FMT_COMS:%=%.dbg)
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TEST_LIBC_FMT_TESTS = $(TEST_LIBC_FMT_SRCS_TEST:%.c=o/$(MODE)/%.com.ok)
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TEST_LIBC_FMT_OBJS = \
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$(TEST_LIBC_FMT_SRCS:%.c=o/$(MODE)/%.o)
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TEST_LIBC_FMT_COMS = \
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$(TEST_LIBC_FMT_SRCS:%.c=o/$(MODE)/%.com)
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TEST_LIBC_FMT_CHECKS = \
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$(TEST_LIBC_FMT_SRCS_TEST:%.c=o/$(MODE)/%.com.runs)
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TEST_LIBC_FMT_DIRECTDEPS = \
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LIBC_FMT \
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LIBC_INTRIN \
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LIBC_LOG \
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LIBC_MEM \
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LIBC_NEXGEN32E \
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LIBC_RUNTIME \
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LIBC_STDIO \
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LIBC_STR \
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LIBC_STUBS \
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LIBC_SYSV \
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LIBC_TESTLIB \
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LIBC_TINYMATH \
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LIBC_X \
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THIRD_PARTY_GDTOA
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TEST_LIBC_FMT_DEPS := \
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$(call uniq,$(foreach x,$(TEST_LIBC_FMT_DIRECTDEPS),$($(x))))
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o/$(MODE)/test/libc/fmt/fmt.pkg: \
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$(TEST_LIBC_FMT_OBJS) \
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$(foreach x,$(TEST_LIBC_FMT_DIRECTDEPS),$($(x)_A).pkg)
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o/$(MODE)/test/libc/fmt/%.com.dbg: \
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$(TEST_LIBC_FMT_DEPS) \
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o/$(MODE)/test/libc/fmt/%.o \
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o/$(MODE)/test/libc/fmt/fmt.pkg \
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$(LIBC_TESTMAIN) \
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$(CRT) \
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$(APE_NO_MODIFY_SELF)
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@$(APELINK)
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$(TEST_LIBC_FMT_OBJS): test/libc/fmt/test.mk
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$(TEST_LIBC_FMT_OBJS): private \
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DEFAULT_CCFLAGS += \
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-fno-builtin
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o/$(MODE)/test/libc/fmt/fprintf_test.com.runs: \
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private .UNVEIL += w:/dev/full
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.PHONY: o/$(MODE)/test/libc/fmt
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o/$(MODE)/test/libc/fmt: \
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$(TEST_LIBC_FMT_BINS) \
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$(TEST_LIBC_FMT_CHECKS)
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