//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
// testfilerunner.m
// testObjects
//
// Created by Blaine Garst on 9/24/08.
//
#import "testfilerunner.h"
#import <Foundation/Foundation.h>
#include <stdio.h>
#include <unistd.h>
#include <fcntl.h>
#include <string.h>
#include <stdlib.h>
#include <stdbool.h>
bool Everything = false; // do it also with 3 levels of optimization
bool DoClang = false;
static bool isDirectory(char *path);
static bool isExecutable(char *path);
static bool isYounger(char *source, char *binary);
static bool readErrorFile(char *buffer, const char *from);
__strong char *gcstrcpy2(__strong const char *arg, char *endp) {
unsigned size = endp - arg + 1;
__strong char *result = NSAllocateCollectable(size, 0);
strncpy(result, arg, size);
result[size-1] = 0;
return result;
}
__strong char *gcstrcpy1(__strong char *arg) {
unsigned size = strlen(arg) + 1;
__strong char *result = NSAllocateCollectable(size, 0);
strncpy(result, arg, size);
result[size-1] = 0;
return result;
}
@implementation TestFileExe
@synthesize options, compileLine, shouldFail, binaryName, sourceName;
@synthesize generator;
@synthesize libraryPath, frameworkPath;
- (NSString *)description {
NSMutableString *result = [NSMutableString new];
if (shouldFail) [result appendString:@"fail"];
for (id x in compileLine) {
[result appendString:[NSString stringWithFormat:@" %s", (char *)x]];
}
return result;
}
- (__strong char *)radar {
return generator.radar;
}
- (bool) compileUnlessExists:(bool)skip {
if (shouldFail) {
printf("don't use this to compile anymore!\n");
return false;
}
if (skip && isExecutable(binaryName) && !isYounger(sourceName, binaryName)) return true;
int argc = [compileLine count];
char *argv[argc+1];
for (int i = 0; i < argc; ++i)
argv[i] = (char *)[compileLine pointerAtIndex:i];
argv[argc] = NULL;
pid_t child = fork();
if (child == 0) {
execv(argv[0], argv);
exit(10); // shouldn't happen
}
if (child < 0) {
printf("fork failed\n");
return false;
}
int status = 0;
pid_t deadchild = wait(&status);
if (deadchild != child) {
printf("wait got %d instead of %d\n", deadchild, child);
exit(1);
}
if (WEXITSTATUS(status) == 0) {
return true;
}
printf("run failed\n");
return false;
}
bool lookforIn(char *lookfor, const char *format, pid_t child) {
char buffer[512];
char got[512];
sprintf(buffer, format, child);
bool gotOutput = readErrorFile(got, buffer);
if (!gotOutput) {
printf("**** didn't get an output file %s to analyze!!??\n", buffer);
return false;
}
char *where = strstr(got, lookfor);
if (!where) {
printf("didn't find '%s' in output file %s\n", lookfor, buffer);
return false;
}
unlink(buffer);
return true;
}
- (bool) compileWithExpectedFailure {
if (!shouldFail) {
printf("Why am I being called?\n");
return false;
}
int argc = [compileLine count];
char *argv[argc+1];
for (int i = 0; i < argc; ++i)
argv[i] = (char *)[compileLine pointerAtIndex:i];
argv[argc] = NULL;
pid_t child = fork();
char buffer[512];
if (child == 0) {
// in child
sprintf(buffer, "/tmp/errorfile_%d", getpid());
close(1);
int fd = creat(buffer, 0777);
if (fd != 1) {
fprintf(stderr, "didn't open custom error file %s as 1, got %d\n", buffer, fd);
exit(1);
}
close(2);
dup(1);
int result = execv(argv[0], argv);
exit(10);
}
if (child < 0) {
printf("fork failed\n");
return false;
}
int status = 0;
pid_t deadchild = wait(&status);
if (deadchild != child) {
printf("wait got %d instead of %d\n", deadchild, child);
exit(11);
}
if (WIFEXITED(status)) {
if (WEXITSTATUS(status) == 0) {
return false;
}
}
else {
printf("***** compiler borked/ICEd/died unexpectedly (status %x)\n", status);
return false;
}
char *error = generator.errorString;
if (!error) return true;
#if 0
char got[512];
sprintf(buffer, "/tmp/errorfile_%d", child);
bool gotOutput = readErrorFile(got, buffer);
if (!gotOutput) {
printf("**** didn't get an error file %s to analyze!!??\n", buffer);
return false;
}
char *where = strstr(got, error);
if (!where) {
printf("didn't find '%s' in error file %s\n", error, buffer);
return false;
}
unlink(buffer);
#else
if (!lookforIn(error, "/tmp/errorfile_%d", child)) return false;
#endif
return true;
}
- (bool) run {
if (shouldFail) return true;
if (sizeof(long) == 4 && options & Do64) {
return true; // skip 64-bit tests
}
int argc = 1;
char *argv[argc+1];
argv[0] = binaryName;
argv[argc] = NULL;
pid_t child = fork();
if (child == 0) {
// set up environment
char lpath[1024];
char fpath[1024];
char *myenv[3];
int counter = 0;
if (libraryPath) {
sprintf(lpath, "DYLD_LIBRARY_PATH=%s", libraryPath);
myenv[counter++] = lpath;
}
if (frameworkPath) {
sprintf(fpath, "DYLD_FRAMEWORK_PATH=%s", frameworkPath);
myenv[counter++] = fpath;
}
myenv[counter] = NULL;
if (generator.warningString) {
// set up stdout/stderr
char outfile[1024];
sprintf(outfile, "/tmp/stdout_%d", getpid());
close(2);
close(1);
creat(outfile, 0700);
dup(1);
}
execve(argv[0], argv, myenv);
exit(10); // shouldn't happen
}
if (child < 0) {
printf("fork failed\n");
return false;
}
int status = 0;
pid_t deadchild = wait(&status);
if (deadchild != child) {
printf("wait got %d instead of %d\n", deadchild, child);
exit(1);
}
if (WIFEXITED(status) && WEXITSTATUS(status) == 0) {
if (generator.warningString) {
if (!lookforIn(generator.warningString, "/tmp/stdout_%d", child)) return false;
}
return true;
}
printf("**** run failed for %s\n", binaryName);
return false;
}
@end
@implementation TestFileExeGenerator
@synthesize filename, compilerPath, errorString;
@synthesize hasObjC, hasRR, hasGC, hasCPlusPlus, wantsC99, supposedToNotCompile, open, wants32, wants64;
@synthesize radar;
@synthesize warningString;
- (void)setFilename:(__strong char *)name {
filename = gcstrcpy1(name);
}
- (void)setCompilerPath:(__strong char *)name {
compilerPath = gcstrcpy1(name);
}
- (void)forMostThings:(NSMutableArray *)lines options:(int)options {
TestFileExe *item = nil;
item = [self lineForOptions:options];
if (item) [lines addObject:item];
item = [self lineForOptions:options|Do64];
if (item) [lines addObject:item];
item = [self lineForOptions:options|DoCPP];
if (item) [lines addObject:item];
item = [self lineForOptions:options|Do64|DoCPP];
if (item) [lines addObject:item];
}
/*
DoDashG = (1 << 8),
DoDashO = (1 << 9),
DoDashOs = (1 << 10),
DoDashO2 = (1 << 11),
*/
- (void)forAllThings:(NSMutableArray *)lines options:(int)options {
[self forMostThings:lines options:options];
if (!Everything) {
return;
}
// now do it with three explicit optimization flags
[self forMostThings:lines options:options | DoDashO];
[self forMostThings:lines options:options | DoDashOs];
[self forMostThings:lines options:options | DoDashO2];
}
- (NSArray *)allLines {
NSMutableArray *result = [NSMutableArray new];
TestFileExe *item = nil;
int options = 0;
[self forAllThings:result options:0];
[self forAllThings:result options:DoOBJC | DoRR];
[self forAllThings:result options:DoOBJC | DoGC];
[self forAllThings:result options:DoOBJC | DoGCRR];
//[self forAllThings:result options:DoOBJC | DoRRGC];
return result;
}
- (void)addLibrary:(const char *)dashLSomething {
if (!extraLibraries) {
extraLibraries = [NSPointerArray pointerArrayWithOptions:
NSPointerFunctionsStrongMemory |
NSPointerFunctionsCStringPersonality];
}
[extraLibraries addPointer:(void *)dashLSomething];
}
- (TestFileExe *)lineForOptions:(int)options { // nil if no can do
if (hasObjC && !(options & DoOBJC)) return nil;
if (hasCPlusPlus && !(options & DoCPP)) return nil;
if (hasObjC) {
if (!hasGC && (options & (DoGC|DoGCRR))) return nil; // not smart enough
if (!hasRR && (options & (DoRR|DoRRGC))) return nil;
}
NSPointerArray *pa = [NSPointerArray pointerArrayWithOptions:
NSPointerFunctionsStrongMemory |
NSPointerFunctionsCStringPersonality];
// construct path
char path[512];
path[0] = 0;
if (!compilerPath) compilerPath = "/usr/bin";
if (compilerPath) {
strcat(path, compilerPath);
strcat(path, "/");
}
if (options & DoCPP) {
strcat(path, DoClang ? "clang++" : "g++-4.2");
}
else {
strcat(path, DoClang ? "clang" : "gcc-4.2");
}
[pa addPointer:gcstrcpy1(path)];
if (options & DoOBJC) {
if (options & DoCPP) {
[pa addPointer:"-ObjC++"];
}
else {
[pa addPointer:"-ObjC"];
}
}
[pa addPointer:"-g"];
if (options & DoDashO) [pa addPointer:"-O"];
else if (options & DoDashO2) [pa addPointer:"-O2"];
else if (options & DoDashOs) [pa addPointer:"-Os"];
if (wantsC99 && (! (options & DoCPP))) {
[pa addPointer:"-std=c99"];
[pa addPointer:"-fblocks"];
}
[pa addPointer:"-arch"];
[pa addPointer: (options & Do64) ? "x86_64" : "i386"];
if (options & DoOBJC) {
switch (options & (DoRR|DoGC|DoGCRR|DoRRGC)) {
case DoRR:
break;
case DoGC:
[pa addPointer:"-fobjc-gc-only"];
break;
case DoGCRR:
[pa addPointer:"-fobjc-gc"];
break;
case DoRRGC:
printf("DoRRGC unsupported right now\n");
[pa addPointer:"-c"];
return nil;
}
[pa addPointer:"-framework"];
[pa addPointer:"Foundation"];
}
[pa addPointer:gcstrcpy1(filename)];
[pa addPointer:"-o"];
path[0] = 0;
strcat(path, filename);
strcat(path, ".");
strcat(path, (options & Do64) ? "64" : "32");
if (options & DoOBJC) {
switch (options & (DoRR|DoGC|DoGCRR|DoRRGC)) {
case DoRR: strcat(path, "-rr"); break;
case DoGC: strcat(path, "-gconly"); break;
case DoGCRR: strcat(path, "-gcrr"); break;
case DoRRGC: strcat(path, "-rrgc"); break;
}
}
if (options & DoCPP) strcat(path, "++");
if (options & DoDashO) strcat(path, "-O");
else if (options & DoDashO2) strcat(path, "-O2");
else if (options & DoDashOs) strcat(path, "-Os");
if (wantsC99) strcat(path, "-C99");
strcat(path, DoClang ? "-clang" : "-gcc");
strcat(path, "-bin");
TestFileExe *result = [TestFileExe new];
result.binaryName = gcstrcpy1(path); // could snarf copy in pa
[pa addPointer:result.binaryName];
for (id cString in extraLibraries) {
[pa addPointer:cString];
}
result.sourceName = gcstrcpy1(filename); // could snarf copy in pa
result.compileLine = pa;
result.options = options;
result.shouldFail = supposedToNotCompile;
result.generator = self;
return result;
}
+ (NSArray *)generatorsFromPath:(NSString *)path {
FILE *fp = fopen([path fileSystemRepresentation], "r");
if (fp == NULL) return nil;
NSArray *result = [self generatorsFromFILE:fp];
fclose(fp);
return result;
}
#define LOOKFOR "CON" "FIG"
char *__strong parseRadar(char *line) {
line = strstr(line, "rdar:"); // returns beginning
char *endp = line + strlen("rdar:");
while (*endp && *endp != ' ' && *endp != '\n')
++endp;
return gcstrcpy2(line, endp);
}
- (void)parseLibraries:(const char *)line {
start:
line = strstr(line, "-l");
char *endp = (char *)line + 2;
while (*endp && *endp != ' ' && *endp != '\n')
++endp;
[self addLibrary:gcstrcpy2(line, endp)];
if (strstr(endp, "-l")) {
line = endp;
goto start;
}
}
+ (TestFileExeGenerator *)generatorFromLine:(char *)line filename:(char *)filename {
TestFileExeGenerator *item = [TestFileExeGenerator new];
item.filename = gcstrcpy1(filename);
if (strstr(line, "GC")) item.hasGC = true;
if (strstr(line, "RR")) item.hasRR = true;
if (strstr(line, "C++")) item.hasCPlusPlus = true;
if (strstr(line, "-C99")) {
item.wantsC99 = true;
}
if (strstr(line, "64")) item.wants64 = true;
if (strstr(line, "32")) item.wants32 = true;
if (strstr(line, "-l")) [item parseLibraries:line];
if (strstr(line, "open")) item.open = true;
if (strstr(line, "FAIL")) item.supposedToNotCompile = true; // old
// compile time error
if (strstr(line, "error:")) {
item.supposedToNotCompile = true;
// zap newline
char *error = strstr(line, "error:") + strlen("error:");
// make sure we have something before the newline
char *newline = strstr(error, "\n");
if (newline && ((newline-error) > 1)) {
*newline = 0;
item.errorString = gcstrcpy1(strstr(line, "error:") + strlen("error: "));
}
}
// run time warning
if (strstr(line, "runtime:")) {
// zap newline
char *error = strstr(line, "runtime:") + strlen("runtime:");
// make sure we have something before the newline
char *newline = strstr(error, "\n");
if (newline && ((newline-error) > 1)) {
*newline = 0;
item.warningString = gcstrcpy1(strstr(line, "runtime:") + strlen("runtime:"));
}
}
if (strstr(line, "rdar:")) item.radar = parseRadar(line);
if (item.hasGC || item.hasRR) item.hasObjC = true;
if (!item.wants32 && !item.wants64) { // give them both if they ask for neither
item.wants32 = item.wants64 = true;
}
return item;
}
+ (NSArray *)generatorsFromFILE:(FILE *)fp {
NSMutableArray *result = [NSMutableArray new];
// pretend this is a grep LOOKFOR *.[cmCM][cmCM] input
// look for
// filename: ... LOOKFOR [GC] [RR] [C++] [FAIL ...]
char buf[512];
while (fgets(buf, 512, fp)) {
char *config = strstr(buf, LOOKFOR);
if (!config) continue;
char *filename = buf;
char *end = strchr(buf, ':');
*end = 0;
[result addObject:[self generatorFromLine:config filename:filename]];
}
return result;
}
+ (TestFileExeGenerator *)generatorFromFilename:(char *)filename {
FILE *fp = fopen(filename, "r");
if (!fp) {
printf("didn't open %s!!\n", filename);
return nil;
}
char buf[512];
while (fgets(buf, 512, fp)) {
char *config = strstr(buf, LOOKFOR);
if (!config) continue;
fclose(fp);
return [self generatorFromLine:config filename:filename];
}
fclose(fp);
// guess from filename
char *ext = strrchr(filename, '.');
if (!ext) return nil;
TestFileExeGenerator *result = [TestFileExeGenerator new];
result.filename = gcstrcpy1(filename);
if (!strncmp(ext, ".m", 2)) {
result.hasObjC = true;
result.hasRR = true;
result.hasGC = true;
}
else if (!strcmp(ext, ".c")) {
;
}
else if (!strcmp(ext, ".M") || !strcmp(ext, ".mm")) {
result.hasObjC = true;
result.hasRR = true;
result.hasGC = true;
result.hasCPlusPlus = true;
}
else if (!strcmp(ext, ".cc")
|| !strcmp(ext, ".cp")
|| !strcmp(ext, ".cxx")
|| !strcmp(ext, ".cpp")
|| !strcmp(ext, ".CPP")
|| !strcmp(ext, ".c++")
|| !strcmp(ext, ".C")) {
result.hasCPlusPlus = true;
}
else {
printf("unknown extension, file %s ignored\n", filename);
result = nil;
}
return result;
}
- (NSString *)description {
return [NSString stringWithFormat:@"%s: %s%s%s%s%s%s",
filename,
LOOKFOR,
hasGC ? " GC" : "",
hasRR ? " RR" : "",
hasCPlusPlus ? " C++" : "",
wantsC99 ? "C99" : "",
supposedToNotCompile ? " FAIL" : ""];
}
@end
void printDetails(NSArray *failures, const char *whatAreThey) {
if ([failures count]) {
NSMutableString *output = [NSMutableString new];
printf("%s:\n", whatAreThey);
for (TestFileExe *line in failures) {
printf("%s", line.binaryName);
char *radar = line.generator.radar;
if (radar)
printf(" (due to %s?),", radar);
printf(" recompile via:\n%s\n\n", line.description.UTF8String);
}
printf("\n");
}
}
void help(const char *whoami) {
printf("Usage: %s [-fast] [-e] [-dyld librarypath] [gcc4.2dir] [-- | source1 ...]\n", whoami);
printf(" -fast don't recompile if binary younger than source\n");
printf(" -open only run tests that are thought to still be unresolved\n");
printf(" -clang use the clang and clang++ compilers\n");
printf(" -e compile all variations also with -Os, -O2, -O3\n");
printf(" -dyld p override DYLD_LIBRARY_PATH and DYLD_FRAMEWORK_PATH to p when running tests\n");
printf(" <compilerpath> directory containing gcc-4.2 (or clang) that you wish to use to compile the tests\n");
printf(" -- assume stdin is a grep CON" "FIG across the test sources\n");
printf(" otherwise treat each remaining argument as a single test file source\n");
printf("%s will compile and run individual test files under a variety of compilers, c, obj-c, c++, and objc++\n", whoami);
printf(" .c files are compiled with all four compilers\n");
printf(" .m files are compiled with objc and objc++ compilers\n");
printf(" .C files are compiled with c++ and objc++ compilers\n");
printf(" .M files are compiled only with the objc++ compiler\n");
printf("(actually all forms of extensions recognized by the compilers are honored, .cc, .c++ etc.)\n");
printf("\nTest files should run to completion with no output and exit (return) 0 on success.\n");
printf("Further they should be able to be compiled and run with GC on or off and by the C++ compilers\n");
printf("A line containing the string CON" "FIG within the source enables restrictions to the above assumptions\n");
printf("and other options.\n");
printf("Following CON" "FIG the string\n");
printf(" C++ restricts the test to only be run by c++ and objc++ compilers\n");
printf(" GC restricts the test to only be compiled and run with GC on\n");
printf(" RR (retain/release) restricts the test to only be compiled and run with GC off\n");
printf("Additionally,\n");
printf(" -C99 restricts the C versions of the test to -fstd=c99 -fblocks\n");
printf(" -O adds the -O optimization level\n");
printf(" -O2 adds the -O2 optimization level\n");
printf(" -Os adds the -Os optimization level\n");
printf("Files that are known to exhibit unresolved problems can provide the term \"open\" and this can");
printf("in turn allow highlighting of fixes that have regressed as well as identify that fixes are now available.\n");
printf("Files that exhibit known bugs may provide\n");
printf(" rdar://whatever such that if they fail the rdar will get cited\n");
printf("Files that are expected to fail to compile should provide, as their last token sequence,\n");
printf(" error:\n");
printf(" or error: substring to match.\n");
printf("Files that are expected to produce a runtime error message should provide, as their last token sequence,\n");
printf(" warning: string to match\n");
printf("\n%s will compile and run all configurations of the test files and report a summary at the end. Good luck.\n", whoami);
printf(" Blaine Garst blaine@apple.com\n");
}
int main(int argc, char *argv[]) {
printf("running on %s-bit architecture\n", sizeof(long) == 4 ? "32" : "64");
char *compilerDir = "/usr/bin";
NSMutableArray *generators = [NSMutableArray new];
bool doFast = false;
bool doStdin = false;
bool onlyOpen = false;
char *libraryPath = getenv("DYLD_LIBRARY_PATH");
char *frameworkPath = getenv("DYLD_FRAMEWORK_PATH");
// process options
while (argc > 1) {
if (!strcmp(argv[1], "-fast")) {
doFast = true;
--argc;
++argv;
}
else if (!strcmp(argv[1], "-dyld")) {
doFast = true;
--argc;
++argv;
frameworkPath = argv[1];
libraryPath = argv[1];
--argc;
++argv;
}
else if (!strcmp(argv[1], "-open")) {
onlyOpen = true;
--argc;
++argv;
}
else if (!strcmp(argv[1], "-clang")) {
DoClang = true;
--argc;
++argv;
}
else if (!strcmp(argv[1], "-e")) {
Everything = true;
--argc;
++argv;
}
else if (!strcmp(argv[1], "--")) {
doStdin = true;
--argc;
++argv;
}
else if (!strcmp(argv[1], "-")) {
help(argv[0]);
return 1;
}
else if (argc > 1 && isDirectory(argv[1])) {
compilerDir = argv[1];
++argv;
--argc;
}
else
break;
}
// process remaining arguments, or stdin
if (argc == 1) {
if (doStdin)
generators = (NSMutableArray *)[TestFileExeGenerator generatorsFromFILE:stdin];
else {
help(argv[0]);
return 1;
}
}
else while (argc > 1) {
TestFileExeGenerator *generator = [TestFileExeGenerator generatorFromFilename:argv[1]];
if (generator) [generators addObject:generator];
++argv;
--argc;
}
// see if we can generate all possibilities
NSMutableArray *failureToCompile = [NSMutableArray new];
NSMutableArray *failureToFailToCompile = [NSMutableArray new];
NSMutableArray *failureToRun = [NSMutableArray new];
NSMutableArray *successes = [NSMutableArray new];
for (TestFileExeGenerator *generator in generators) {
//NSLog(@"got %@", generator);
if (onlyOpen && !generator.open) {
//printf("skipping resolved test %s\n", generator.filename);
continue; // skip closed if onlyOpen
}
if (!onlyOpen && generator.open) {
//printf("skipping open test %s\n", generator.filename);
continue; // skip open if not asked for onlyOpen
}
generator.compilerPath = compilerDir;
NSArray *tests = [generator allLines];
for (TestFileExe *line in tests) {
line.frameworkPath = frameworkPath; // tell generators about it instead XXX
line.libraryPath = libraryPath; // tell generators about it instead XXX
if ([line shouldFail]) {
if (doFast) continue; // don't recompile & don't count as success
if ([line compileWithExpectedFailure]) {
[successes addObject:line];
}
else
[failureToFailToCompile addObject:line];
}
else if ([line compileUnlessExists:doFast]) {
if ([line run]) {
printf("%s ran successfully\n", line.binaryName);
[successes addObject:line];
}
else {
[failureToRun addObject:line];
}
}
else {
[failureToCompile addObject:line];
}
}
}
printf("\n--- results ---\n\n%lu successes\n%lu unexpected compile failures\n%lu failure to fail to compile errors\n%lu run failures\n",
[successes count], [failureToCompile count], [failureToFailToCompile count], [failureToRun count]);
printDetails(failureToCompile, "unexpected compile failures");
printDetails(failureToFailToCompile, "should have failed to compile but didn't failures");
printDetails(failureToRun, "run failures");
if (onlyOpen && [successes count]) {
NSMutableSet *radars = [NSMutableSet new];
printf("The following tests ran successfully suggesting that they are now resolved:\n");
for (TestFileExe *line in successes) {
printf("%s\n", line.binaryName);
if (line.radar) [radars addObject:line.generator];
}
if ([radars count]) {
printf("The following radars may be resolved:\n");
for (TestFileExeGenerator *line in radars) {
printf("%s\n", line.radar);
}
}
}
return [failureToCompile count] + [failureToRun count];
}
#include <sys/stat.h>
static bool isDirectory(char *path) {
struct stat statb;
int retval = stat(path, &statb);
if (retval != 0) return false;
if (statb.st_mode & S_IFDIR) return true;
return false;
}
static bool isExecutable(char *path) {
struct stat statb;
int retval = stat(path, &statb);
if (retval != 0) return false;
if (!(statb.st_mode & S_IFREG)) return false;
if (statb.st_mode & S_IXUSR) return true;
return false;
}
static bool isYounger(char *source, char *binary) {
struct stat statb;
int retval = stat(binary, &statb);
if (retval != 0) return true; // if doesn't exit, lie
struct stat stata;
retval = stat(source, &stata);
if (retval != 0) return true; // we're hosed
// the greater the timeval the younger it is
if (stata.st_mtimespec.tv_sec > statb.st_mtimespec.tv_sec) return true;
if (stata.st_mtimespec.tv_nsec > statb.st_mtimespec.tv_nsec) return true;
return false;
}
static bool readErrorFile(char *buffer, const char *from) {
int fd = open(from, 0);
if (fd < 0) {
printf("didn't open %s, (might not have been created?)\n", buffer);
return false;
}
int count = read(fd, buffer, 512);
if (count < 1) {
printf("read error on %s\n", buffer);
return false;
}
buffer[count-1] = 0; // zap newline
return true;
}