commit 7fd05a0875b829f295c2c7a95d6105ff95ea72eb
parent 803473f3dedef45b706cd124bff7f5f3bacb0a7e
Author: Roberto E. Vargas Caballero <k0ga@shike2.net>
Date: Mon, 27 Apr 2026 23:28:01 +0200
tests/libc: Add 0073-mktime
Diffstat:
3 files changed, 127 insertions(+), 0 deletions(-)
diff --git a/tests/libc/execute/.gitignore b/tests/libc/execute/.gitignore
@@ -71,3 +71,4 @@ test.log
0070-difftime
0071-clock
0072-mktime
+0073-mktime
diff --git a/tests/libc/execute/0073-mktime.c b/tests/libc/execute/0073-mktime.c
@@ -0,0 +1,125 @@
+/*
+output:
+testing
+test 0
+tm_sec=59, tm_min=30, tm_hour=12, tm_mday=28, tm_mon= 0, tm_year= 121, tm_wday=4, tm_yday= 27, tm_isdst=0
+Thu Jan 28 12:30:59 2021 CET
+Thu Jan 28 13:30:59 2021 UTC
+Thu Jan 28 12:30:59 2021 CET
+Thu Jan 28 12:30:59 2021
+Thu Jan 28 12:30:59 2021
+done
+end:
+*/
+
+#include <assert.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <time.h>
+
+#define NELEM(x) (sizeof(x)/sizeof((x)[0]))
+
+struct test {
+ struct tm tm;
+ char *tz;
+} tests[] = {
+ //sec,min,hour,mday,mon,year,wday,yday,isdst,tz,
+ {{ 59, 30, 12, 28, 0, 121, 0, 0, 0},"CET01CEST"},
+};
+
+char *faketz;
+
+#ifndef __unix__
+#define putenv(x) (x)
+/*
+ * Ok, this is by definition undefined behaviour because
+ * we are using the name of a library function. The reallity
+ * is that if you use a static linker then this would
+ * overload the libc getenv and it will work as expected,
+ * but if you use a dynamic linker then the internal
+ * references will be tied to the internal getenv function
+ * and this would not work. For our main use case that is
+ * testing scc libc this is good enough, and with the
+ * fallback to putenv and unsetenv this will work in
+ * the systems we are interested on
+ */
+char *
+getenv(const char *name)
+{
+ if (strcmp(name, "TZ") != 0)
+ return NULL;
+ return faketz;
+}
+#endif
+
+int
+test(void)
+{
+ time_t t;
+ char buf[70], var[70], *tz;
+ struct tm *tm;
+ struct test *tp;
+
+ for (tp = tests; tp < &tests[NELEM(tests)]; ++tp) {
+ printf("test %d\n", (int) (tp - tests));
+ tz = tp->tz;
+ if (!tz)
+ tz = "UTC";
+ faketz = tz;
+ sprintf(var, "TZ=%s", tz);
+ putenv(var);
+
+ t = mktime(&tp->tm);
+ if (t == -1) {
+ puts("failed");
+ continue;
+ }
+ printf("tm_sec=%2d, "
+ "tm_min=%2d, "
+ "tm_hour=%2d, "
+ "tm_mday=%2d, "
+ "tm_mon=%2d, "
+ "tm_year=%4d, "
+ "tm_wday=%d, "
+ "tm_yday=%3d, "
+ "tm_isdst=%d\n",
+ tp->tm.tm_sec,
+ tp->tm.tm_min,
+ tp->tm.tm_hour,
+ tp->tm.tm_mday,
+ tp->tm.tm_mon,
+ tp->tm.tm_year,
+ tp->tm.tm_wday,
+ tp->tm.tm_yday,
+ tp->tm.tm_isdst);
+ strftime(buf, sizeof(buf), "%c %Z", &tp->tm);
+ puts(buf);
+
+ tm = gmtime(&t);
+ strftime(buf, sizeof(buf), "%c %Z", tm);
+ puts(buf);
+
+ tm = localtime(&t);
+ strftime(buf, sizeof(buf), "%c %Z", tm);
+ puts(buf);
+
+ fputs(asctime(tm), stdout);
+ fputs(ctime(&t), stdout);
+ }
+
+ return 0;
+}
+
+int
+main(void)
+{
+#if !defined(__SCC_TZ_TIME__)
+ puts("RESULT: SKIP");
+ return 0;
+#endif
+ puts("testing");
+ test();
+ puts("done");
+ return 0;
+}
diff --git a/tests/libc/execute/libc-tests.lst b/tests/libc/execute/libc-tests.lst
@@ -69,3 +69,4 @@
0070-difftime
0071-clock
0072-mktime
+0073-mktime
