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Make fuzzer stub main() quiet by default.

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LLVM LibFuzzer displays the input and running time by default but
we don't care about that for the stub fuzzer library.
This commit is contained in:
Todd C. Miller 2022-02-28 13:33:54 -07:00
parent f35bbd5a3f
commit 6a84523671
1 changed files with 23 additions and 11 deletions
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34
lib/fuzzstub/fuzzstub.c
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@ -61,13 +61,21 @@ main(int argc, char *argv[])
struct stat sb; struct stat sb;
uint8_t *buf = NULL; uint8_t *buf = NULL;
int fd, i, errors = 0; int fd, i, errors = 0;
int verbose = 0;
long ms; long ms;
/* Test provided input files. */ /* Test provided input files. */
for (i = 1; i < argc; i++) { for (i = 1; i < argc; i++) {
fd = open(argv[i], O_RDONLY); const char *arg = argv[i];
if (*arg == '-') {
if (strncmp(arg, "-verbosity=", sizeof("-verbosity=") - 1) == 0) {
verbose = atoi(arg + sizeof("-verbosity=") - 1);
}
continue;
}
fd = open(arg, O_RDONLY);
if (fd == -1 || fstat(fd, &sb) != 0) { if (fd == -1 || fstat(fd, &sb) != 0) {
fprintf(stderr, "open %s: %s\n", argv[i], strerror(errno)); fprintf(stderr, "open %s: %s\n", arg, strerror(errno));
if (fd != -1) if (fd != -1)
close(fd); close(fd);
errors++; errors++;
@ -76,7 +84,7 @@ main(int argc, char *argv[])
#ifndef __LP64__ #ifndef __LP64__
if (sizeof(sb.st_size) > sizeof(size_t) && sb.st_size > SSIZE_MAX) { if (sizeof(sb.st_size) > sizeof(size_t) && sb.st_size > SSIZE_MAX) {
errno = E2BIG; errno = E2BIG;
fprintf(stderr, "%s: %s\n", argv[i], strerror(errno)); fprintf(stderr, "%s: %s\n", arg, strerror(errno));
close(fd); close(fd);
errors++; errors++;
continue; continue;
@ -97,9 +105,9 @@ main(int argc, char *argv[])
nread = read(fd, buf, filesize); nread = read(fd, buf, filesize);
if ((size_t)nread != filesize) { if ((size_t)nread != filesize) {
if (nread == -1) if (nread == -1)
fprintf(stderr, "read %s: %s\n", argv[i], strerror(errno)); fprintf(stderr, "read %s: %s\n", arg, strerror(errno));
else else
fprintf(stderr, "read %s: short read\n", argv[i]); fprintf(stderr, "read %s: short read\n", arg);
close(fd); close(fd);
errors++; errors++;
continue; continue;
@ -107,13 +115,17 @@ main(int argc, char *argv[])
close(fd); close(fd);
/* NOTE: doesn't support LLVMFuzzerInitialize() (but we don't use it) */ /* NOTE: doesn't support LLVMFuzzerInitialize() (but we don't use it) */
fprintf(stderr, "Running: %s\n", argv[i]); if (verbose > 0) {
sudo_gettime_mono(&start_time); fprintf(stderr, "Running: %s\n", arg);
sudo_gettime_mono(&start_time);
}
LLVMFuzzerTestOneInput(buf, nread); LLVMFuzzerTestOneInput(buf, nread);
sudo_gettime_mono(&stop_time); if (verbose > 0) {
sudo_timespecsub(&stop_time, &start_time, &stop_time); sudo_gettime_mono(&stop_time);
ms = (stop_time.tv_sec * 1000) + (stop_time.tv_nsec / 1000000); sudo_timespecsub(&stop_time, &start_time, &stop_time);
fprintf(stderr, "Executed %s in %ld ms\n", argv[i], ms); ms = (stop_time.tv_sec * 1000) + (stop_time.tv_nsec / 1000000);
fprintf(stderr, "Executed %s in %ld ms\n", arg, ms);
}
} }
free(buf); free(buf);