semihosting tests: Add tests for SYS_ISTTY

Add basic tests of SYS_ISTTY.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

3 files changed, 71 insertions, 0 deletions

diff --git a/semihosting.c b/semihosting.c
index 28e0aa7..6211b59 100644
--- a/semihosting.c
+++ b/semihosting.c
@@ -80,6 +80,16 @@ int semi_flen(int fd)
     return __semi_call(SYS_FLEN, &args);
 }
 
+int semi_istty(int fd)
+{
+    struct {
+        intptr_t fd;
+    } args;
+
+    args.fd = fd;
+    return __semi_call(SYS_ISTTY, &args);
+}
+
 int semi_get_cmdline(char *buffer, int size, int *length)
 {
     int result;
diff --git a/semihosting.h b/semihosting.h
index 405e355..dc097af 100644
--- a/semihosting.h
+++ b/semihosting.h
@@ -25,6 +25,7 @@
 #define SYS_WRITEC	3
 #define SYS_WRITE0	4
 #define SYS_READ	6
+#define SYS_ISTTY	9
 #define SYS_FLEN	0x0C
 #define SYS_GET_CMDLINE	0x15
 #define SYS_REPORTEXC	0x18
@@ -40,6 +41,7 @@ int semi_write0(char const *string);
 void semi_writec(char c);
 int semi_read(int fd, char *buffer, int length);
 int semi_flen(int fd);
+int semi_istty(int fd);
 int semi_get_cmdline(char *buffer, int size, int *length);
 int semi_reportexc(int reason, int subcode);
 void semi_fatal(char const *message);
diff --git a/usertest.c b/usertest.c
index ef1eaf8..8bb6e5b 100644
--- a/usertest.c
+++ b/usertest.c
@@ -40,6 +40,61 @@ void semi_putc(void *p, char c)
 #define TESTDATA_FILE "testdata.txt"
 const char file[] = "Small file of text data for test.\n";
 
+static int test_istty(void)
+{
+    int fd;
+    int fail = 0;
+
+    fd = semi_open(TESTDATA_FILE, OPEN_RDONLY);
+    if (fd == -1) {
+        semi_write0("FAIL could not open test data file\n");
+        return 1;
+    }
+
+    switch (semi_istty(fd)) {
+    case 0:
+        semi_write0("PASS istty(file) returned 0\n");
+        break;
+    case 1:
+        semi_write0("FAIL istty(file) returned 1\n");
+        fail++;
+        break;
+    default:
+        semi_write0("FAIL istty(file) failed\n");
+        fail++;
+        break;
+    }
+    semi_close(fd);
+    if (fail) {
+        return 1;
+    }
+
+    fd = semi_open(":tt", OPEN_RDONLY);
+    if (fd == -1) {
+        semi_write0("FAIL could not open stdin\n");
+        return 1;
+    }
+
+    switch (semi_istty(fd)) {
+    case 0:
+        semi_write0("FAIL istty(stdin) returned 0\n");
+        fail++;
+        break;
+    case 1:
+        semi_write0("PASS istty(stdin) returned 1\n");
+        break;
+    default:
+        semi_write0("FAIL istty(stdin) failed\n");
+        fail++;
+        break;
+    }
+    semi_close(fd);
+    if (fail) {
+        return 1;
+    }
+    return 0;
+}
+
 int main(void)
 {
     void *bufp;
@@ -75,6 +130,10 @@ int main(void)
     }
     semi_write0("PASS test file contents match\n");
 
+    if (test_istty()) {
+        return 1;
+    }
+
     semi_write0("ALL TESTS PASSED\n");
     semi_exit(0);
     /* not reached */