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-rw-r--r--src/shared/util.c43
-rw-r--r--src/shared/util.h2
-rw-r--r--src/test/test-util.c20
3 files changed, 65 insertions, 0 deletions
diff --git a/src/shared/util.c b/src/shared/util.c
index 8b8d2fbc5e..7e17851fcd 100644
--- a/src/shared/util.c
+++ b/src/shared/util.c
@@ -6347,3 +6347,46 @@ char* mount_test_option(const char *haystack, const char *needle) {
return hasmntopt(&me, needle);
}
+
+void hexdump(FILE *f, const void *p, size_t s) {
+ const uint8_t *b = p;
+ unsigned n = 0;
+
+ assert(s == 0 || b);
+
+ while (s > 0) {
+ size_t i;
+
+ fprintf(f, "%04x ", n);
+
+ for (i = 0; i < 16; i++) {
+
+ if (i >= s)
+ fputs(" ", f);
+ else
+ fprintf(f, "%02x ", b[i]);
+
+ if (i == 7)
+ fputc(' ', f);
+ }
+
+ fputc(' ', f);
+
+ for (i = 0; i < 16; i++) {
+
+ if (i >= s)
+ fputc(' ', f);
+ else
+ fputc(isprint(b[i]) ? (char) b[i] : '.', f);
+ }
+
+ fputc('\n', f);
+
+ if (s < 16)
+ break;
+
+ n += 16;
+ b += 16;
+ s -= 16;
+ }
+}
diff --git a/src/shared/util.h b/src/shared/util.h
index e99f8d1123..c596d795d3 100644
--- a/src/shared/util.h
+++ b/src/shared/util.h
@@ -914,3 +914,5 @@ const char *personality_to_string(unsigned long);
uint64_t physical_memory(void);
char* mount_test_option(const char *haystack, const char *needle);
+
+void hexdump(FILE *f, const void *p, size_t s);
diff --git a/src/test/test-util.c b/src/test/test-util.c
index 229f492889..6297182e0b 100644
--- a/src/test/test-util.c
+++ b/src/test/test-util.c
@@ -626,6 +626,25 @@ static void test_writing_tmpfile(void) {
assert(streq(contents, "abc\n" ALPHANUMERICAL "\n"));
}
+static void test_hexdump(void) {
+ uint8_t data[146];
+ unsigned i;
+
+ hexdump(stdout, NULL, 0);
+ hexdump(stdout, "", 0);
+ hexdump(stdout, "", 1);
+ hexdump(stdout, "x", 1);
+ hexdump(stdout, "x", 2);
+ hexdump(stdout, "foobar", 7);
+ hexdump(stdout, "f\nobar", 7);
+ hexdump(stdout, "xxxxxxxxxxxxxxxxxxxxyz", 23);
+
+ for (i = 0; i < ELEMENTSOF(data); i++)
+ data[i] = i*2;
+
+ hexdump(stdout, data, sizeof(data));
+}
+
int main(int argc, char *argv[]) {
log_parse_environment();
log_open();
@@ -667,6 +686,7 @@ int main(int argc, char *argv[]) {
test_get_files_in_directory();
test_in_set();
test_writing_tmpfile();
+ test_hexdump();
return 0;
}