diff --git a/tests/Makefile b/tests/Makefile
index 15e6cee70e073d4b410c091cd60eb367ba745b20..e1682dd0bdddefaafdf5a87fdee7fb09bdc1509c 100644
--- a/tests/Makefile
+++ b/tests/Makefile
@@ -98,6 +98,7 @@ EXPECT_NAMES=\
tls \
unistd/access \
unistd/brk \
+ unistd/constants \
unistd/dup \
unistd/exec \
unistd/fchdir \
diff --git a/tests/expected/bins_static/unistd/constants.stderr b/tests/expected/bins_static/unistd/constants.stderr
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/tests/expected/bins_static/unistd/constants.stdout b/tests/expected/bins_static/unistd/constants.stdout
new file mode 100644
index 0000000000000000000000000000000000000000..90c907f1ffd8e3a382bb8d8e67bab1b00a2c76be
--- /dev/null
+++ b/tests/expected/bins_static/unistd/constants.stdout
@@ -0,0 +1,16 @@
+_POSIX_VERSION: 200809
+NULL: (nil)
+R_OK: 4
+W_OK: 2
+X_OK: 1
+F_OK: 0
+SEEK_SET: 0
+SEEK_CUR: 1
+SEEK_END: 2
+F_LOCK: 1
+F_ULOCK: 0
+F_TEST: 3
+F_TLOCK: 2
+STDIN_FILENO: 0
+STDOUT_FILENO: 1
+STDERR_FILENO: 2
diff --git a/tests/unistd/constants.c b/tests/unistd/constants.c
new file mode 100644
index 0000000000000000000000000000000000000000..46549c54a3247c12090faca89b106dc45a50fea8
--- /dev/null
+++ b/tests/unistd/constants.c
@@ -0,0 +1,123 @@
+#include <unistd.h>
+#include <stdio.h>
+
+#include "test_helpers.h"
+
+int main(void) {
+ // Constants specified in https://pubs.opengroup.org/onlinepubs/7908799/xsh/unistd.h.html
+
+ printf("_POSIX_VERSION: %ld\n", _POSIX_VERSION);
+ /* TODO
+ printf("_POSIX2_VERSION: %ld\n", _POSIX2_VERSION);
+ printf("_POSIX2_C_VERSION: %ld\n", _POSIX2_C_VERSION);
+ printf("_XOPEN_VERSION: %d\n", _XOPEN_VERSION);
+
+ printf("_XOPEN_XCU_VERSION: %d\n", _XOPEN_XCU_VERSION);
+
+ printf("_XOPEN_XPG2: %d\n", _XOPEN_XPG2);
+ printf("_XOPEN_XPG3: %d\n", _XOPEN_XPG3);
+ printf("_XOPEN_XPG4: %d\n", _XOPEN_XPG4);
+ printf("_XOPEN_UNIX: %d\n", _XOPEN_UNIX);
+
+ printf("_POSIX_CHOWN_RESTRICTED: %d\n", _POSIX_CHOWN_RESTRICTED);
+ printf("_POSIX_NO_TRUNC: %d\n", _POSIX_NO_TRUNC);
+ printf("_POSIX_VDISABLE: %d\n", _POSIX_VDISABLE);
+ printf("_POSIX_SAVED_IDS: %d\n", _POSIX_SAVED_IDS);
+ printf("_POSIX_JOB_CONTROL: %d\n", _POSIX_JOB_CONTROL);
+ printf("_POSIX_THREADS: %ld\n", _POSIX_THREADS);
+ printf("_POSIX_THREAD_ATTR_STACKADDR: %ld\n", _POSIX_THREAD_ATTR_STACKADDR);
+ printf("_POSIX_THREAD_ATTR_STACKSIZE: %ld\n", _POSIX_THREAD_ATTR_STACKSIZE);
+ printf("_POSIX_THREAD_PROCESS_SHARED: %ld\n", _POSIX_THREAD_PROCESS_SHARED);
+ printf("_POSIX_THREAD_SAFE_FUNCTIONS: %ld\n", _POSIX_THREAD_SAFE_FUNCTIONS);
+
+ printf("_POSIX2_C_BIND: %ld\n", _POSIX2_C_BIND);
+ printf("_POSIX2_C_DEV: %ld\n", _POSIX2_C_DEV);
+ printf("_POSIX2_CHAR_TERM: %ld\n", _POSIX2_CHAR_TERM);
+ printf("_POSIX2_FORT_DEV: %d\n", _POSIX2_FORT_DEV);
+ printf("_POSIX2_FORT_RUN: %d\n", _POSIX2_FORT_RUN);
+ printf("_POSIX2_LOCALEDEF: %ld\n", _POSIX2_LOCALEDEF);
+ printf("_POSIX2_SW_DEV: %ld\n", _POSIX2_SW_DEV);
+ printf("_POSIX2_UPE: %d\n", _POSIX2_UPE);
+ printf("_XOPEN_CRYPT: %d\n", _XOPEN_CRYPT);
+ printf("_XOPEN_ENH_I18N: %d\n", _XOPEN_ENH_I18N);
+ printf("_XOPEN_LEGACY: %d\n", _XOPEN_LEGACY);
+ printf("_XOPEN_REALTIME: %d\n", _XOPEN_REALTIME);
+ printf("_XOPEN_REALTIME_THREADS: %d\n", _XOPEN_REALTIME_THREADS);
+ printf("_XOPEN_SHM: %d\n", _XOPEN_SHM);
+ printf("_XBS5_ILP32_OFF32: %d\n", _XBS5_ILP32_OFF32);
+ printf("_XBS5_ILP32_OFFBIG: %d\n", _XBS5_ILP32_OFFBIG);
+ printf("_XBS5_LP64_OFF64: %d\n", _XBS5_LP64_OFF64);
+ printf("_XBS5_LPBIG_OFFBIG: %d\n", _XBS5_LPBIG_OFFBIG);
+
+ printf("_POSIX_ASYNCHRONOUS_IO: %ld\n", _POSIX_ASYNCHRONOUS_IO);
+ printf("_POSIX_MEMLOCK: %ld\n", _POSIX_MEMLOCK);
+ printf("_POSIX_MEMLOCK_RANGE: %ld\n", _POSIX_MEMLOCK_RANGE);
+ printf("_POSIX_MESSAGE_PASSING: %ld\n", _POSIX_MESSAGE_PASSING);
+ printf("_POSIX_PRIORITY_SCHEDULING: %ld\n", _POSIX_PRIORITY_SCHEDULING);
+ printf("_POSIX_REALTIME_SIGNALS: %ld\n", _POSIX_REALTIME_SIGNALS);
+ printf("_POSIX_SEMAPHORES: %ld\n", _POSIX_SEMAPHORES);
+ printf("_POSIX_SHARED_MEMORY_OBJECTS: %ld\n", _POSIX_SHARED_MEMORY_OBJECTS);
+ printf("_POSIX_SYNCHRONIZED_IO: %ld\n", _POSIX_SYNCHRONIZED_IO);
+ printf("_POSIX_TIMERS: %ld\n", _POSIX_TIMERS);
+
+ printf("_POSIX_FSYNC: %ld\n", _POSIX_FSYNC);
+ printf("_POSIX_MAPPED_FILES: %ld\n", _POSIX_MAPPED_FILES);
+ printf("_POSIX_MEMORY_PROTECTION: %ld\n", _POSIX_MEMORY_PROTECTION);
+
+ printf("_POSIX_PRIORITIZED_IO: %ld\n", _POSIX_PRIORITIZED_IO);
+
+ printf("_POSIX_THREAD_PRIORITY_SCHEDULING: %ld\n", _POSIX_THREAD_PRIORITY_SCHEDULING);
+ printf("_POSIX_THREAD_PRIO_INHERIT: %ld\n", _POSIX_THREAD_PRIO_INHERIT);
+ printf("_POSIX_THREAD_PRIO_PROTECT: %ld\n", _POSIX_THREAD_PRIO_PROTECT);
+
+ printf("_POSIX_ASYNC_IO: %d\n", _POSIX_ASYNC_IO);
+ printf("_POSIX_PRIO_IO: %d\n", _POSIX_PRIO_IO);
+ printf("_POSIX_SYNC_IO: %d\n", _POSIX_SYNC_IO);
+ */
+
+ printf("NULL: %p\n", NULL);
+
+ printf("R_OK: %d\n", R_OK);
+ printf("W_OK: %d\n", W_OK);
+ printf("X_OK: %d\n", X_OK);
+ printf("F_OK: %d\n", F_OK);
+
+ /* TODO: confstr() constants:
+ printf("_CS_PATH: %d\n", _CS_PATH);
+ printf("_CS_XBS5_ILP32_OFF32_CFLAGS: %d\n", _CS_XBS5_ILP32_OFF32_CFLAGS);
+ printf("_CS_XBS5_ILP32_OFF32_LDFLAGS: %d\n", _CS_XBS5_ILP32_OFF32_LDFLAGS);
+ printf("_CS_XBS5_ILP32_OFF32_LIBS: %d\n", _CS_XBS5_ILP32_OFF32_LIBS);
+ printf("_CS_XBS5_ILP32_OFF32_LINTFLAGS: %d\n", _CS_XBS5_ILP32_OFF32_LINTFLAGS);
+ printf("_CS_XBS5_ILP32_OFFBIG_CFLAGS: %d\n", _CS_XBS5_ILP32_OFFBIG_CFLAGS);
+ printf("_CS_XBS5_ILP32_OFFBIG_LDFLAGS: %d\n", _CS_XBS5_ILP32_OFFBIG_LDFLAGS);
+ printf("_CS_XBS5_ILP32_OFFBIG_LIBS: %d\n", _CS_XBS5_ILP32_OFFBIG_LIBS);
+ printf("_CS_XBS5_ILP32_OFFBIG_LINTFLAGS: %d\n", _CS_XBS5_ILP32_OFFBIG_LINTFLAGS);
+ printf("_CS_XBS5_LP64_OFF64_CFLAGS: %d\n", _CS_XBS5_LP64_OFF64_CFLAGS);
+ printf("_CS_XBS5_LP64_OFF64_LDFLAGS: %d\n", _CS_XBS5_LP64_OFF64_LDFLAGS);
+ printf("_CS_XBS5_LP64_OFF64_LIBS: %d\n", _CS_XBS5_LP64_OFF64_LIBS);
+ printf("_CS_XBS5_LP64_OFF64_LINTFLAGS: %d\n", _CS_XBS5_LP64_OFF64_LINTFLAGS);
+ printf("_CS_XBS5_LPBIG_OFFBIG_CFLAGS: %d\n", _CS_XBS5_LPBIG_OFFBIG_CFLAGS);
+ printf("_CS_XBS5_LPBIG_OFFBIG_LDFLAGS: %d\n", _CS_XBS5_LPBIG_OFFBIG_LDFLAGS);
+ printf("_CS_XBS5_LPBIG_OFFBIG_LIBS: %d\n", _CS_XBS5_LPBIG_OFFBIG_LIBS);
+ printf("_CS_XBS5_LPBIG_OFFBIG_LINTFLAGS: %d\n", _CS_XBS5_LPBIG_OFFBIG_LINTFLAGS);
+ */
+
+ printf("SEEK_SET: %d\n", SEEK_SET);
+ printf("SEEK_CUR: %d\n", SEEK_CUR);
+ printf("SEEK_END: %d\n", SEEK_END);
+
+ // sysconf() constants (_SC_*) are tested separately
+
+ printf("F_LOCK: %d\n", F_LOCK);
+ printf("F_ULOCK: %d\n", F_ULOCK);
+ printf("F_TEST: %d\n", F_TEST);
+ printf("F_TLOCK: %d\n", F_TLOCK);
+
+ // pathconf() constants (_PC_*) are tested separately
+
+ printf("STDIN_FILENO: %d\n", STDIN_FILENO);
+ printf("STDOUT_FILENO: %d\n", STDOUT_FILENO);
+ printf("STDERR_FILENO: %d\n", STDERR_FILENO);
+
+ return 0;
+}