Take the terminal name from term_options.name

The core hard-coded "wsap_term" for XTVERSION, the XTGETTCAP TN and
name default, and the OSC 9 notification title. A headless library
should take its identity from the host.

term_options.name sets the name. NULL or "" selects "term". term_new()
copies it and returns NULL unless it is 1 to 63 printable ASCII bytes,
since DCS replies echo it. A DCS +p still changes the TN value, and
the XTVERSION and notification defaults keep the host name.

Co-Authored-By: Claude Haiku 5.5 <noreply@anthropic.com>

7 files changed, 116 insertions, 11 deletions

diff --git a/tests/dcs_test.c b/tests/dcs_test.c
index 0e67f78..d9455be 100644
--- a/tests/dcs_test.c
+++ b/tests/dcs_test.c
@@ -176,8 +176,8 @@ static void test_xtgettcap(void)
 {
     struct term *t = new_term(80, 24);
     assert_tcap(t, "kind", "\033[1;2B");
-    assert_tcap(t, "TN", "wsap_term");
-    assert_tcap(t, "name", "wsap_term");
+    assert_tcap(t, "TN", "term");
+    assert_tcap(t, "name", "term");
     assert_tcap(t, "Co", "16777216");
     assert_tcap(t, "colors", "16777216");
     assert_tcap(t, "RGB", "8/8/8");
@@ -230,7 +230,7 @@ static void test_xtgettcap_multi(void)
 
     snprintf(req, sizeof(req), "\033P+q%s;%s\033\\", hk, htn);
     snprintf(want, sizeof(want), "\033P1+r%s=%s;%s=%s\033\\",
-             hk, hv, htn, "777361705f7465726d");
+             hk, hv, htn, "7465726d");
     response_len = 0;
     write_seq(t, req);
     expect_response(want);
@@ -383,7 +383,51 @@ static void test_xtversion(void)
     struct term *t = new_term(80, 24);
     response_len = 0;
     write_seq(t, "\033[>0q");
-    expect_response("\033P>|wsap_term\033\\");
+    expect_response("\033P>|term\033\\");
+    term_free(t);
+}
+
+/* term_options.name feeds XTVERSION and the TN and name capabilities. */
+static void test_host_name(void)
+{
+    struct term_options opt = {
+        .size = { .x = 80, .y = 24 },
+        .scrollback = TEST_SCROLLBACK,
+        .name = "myterm",
+        .callbacks = { .reply = respond },
+    };
+    struct term *t = term_new(&opt);
+    assert(t);
+    response_len = 0;
+    write_seq(t, "\033[>0q");
+    expect_response("\033P>|myterm\033\\");
+    assert_tcap(t, "TN", "myterm");
+    assert_tcap(t, "name", "myterm");
+
+    /* A DCS +p sets the capability value. The XTVERSION name does not change. */
+    response_len = 0;
+    write_seq(t, "\033P+p6f74686572\033\\");
+    expect_no_response();
+    assert_tcap(t, "TN", "other");
+    response_len = 0;
+    write_seq(t, "\033[>0q");
+    expect_response("\033P>|myterm\033\\");
+    term_free(t);
+
+    /* NULL and "" both select the default. */
+    opt.name = "";
+    t = term_new(&opt);
+    assert(t);
+    response_len = 0;
+    write_seq(t, "\033[>0q");
+    expect_response("\033P>|term\033\\");
+    term_free(t);
+    opt.name = NULL;
+    t = term_new(&opt);
+    assert(t);
+    response_len = 0;
+    write_seq(t, "\033[>0q");
+    expect_response("\033P>|term\033\\");
     term_free(t);
 }
 
@@ -467,6 +511,7 @@ int main(void)
     test_synchronized_output();
     test_ignored_dcs();
     test_xtversion();
+    test_host_name();
     test_bel_terminator();
     test_dcs_long_query();
     test_dcs_abort_c0();
diff --git a/tests/model.c b/tests/model.c
index 8dead6c..b538ba1 100644
--- a/tests/model.c
+++ b/tests/model.c
@@ -72,6 +72,7 @@ enum { GROUND, ESC, CSI, STR, STR_ESC, CHARSET, HASH, DOCS };
 enum { OSC, DCS, IGNORE };
 
 struct model {
+    char name[64];      /* XTVERSION reply */
     int cols, rows, limit;
     struct row **scr;
     struct row **hist;
@@ -1625,7 +1626,7 @@ static void csi_dispatch(struct model *m, unsigned char final)
         break;
     case 'q':
         if (m->prefix == '>' && !m->inter && (!m->nparam || !m->param[0])) {
-            reply(m, "\033P>|wsap_term\033\\");
+            reply(m, "\033P>|%s\033\\", m->name);
         } else if (!m->prefix && m->inter == ' ') {
             int ps = m->nparam ? m->param[0] : 0;
             if (ps == 0) {
@@ -1971,10 +1972,11 @@ static void feed_byte(struct model *m, unsigned char c)
 
 /* ---- public ---- */
 
-struct model *model_new(struct term_vector2i size, int history)
+struct model *model_new(struct term_vector2i size, int history, const char *name)
 {
     struct model *m = calloc(1, sizeof(*m));
     if (!m) abort();
+    snprintf(m->name, sizeof(m->name), "%s", name && *name ? name : "term");
     m->cols = size.x < 1 ? 80 : size.x;
     m->rows = size.y < 1 ? 24 : size.y;
     m->limit = history_limit(history);
diff --git a/tests/model.h b/tests/model.h
index 9a4316f..1707ef7 100644
--- a/tests/model.h
+++ b/tests/model.h
@@ -28,8 +28,9 @@ struct model_cell {
 
 struct model;
 
-/* history is the history limit, as in term_options.scrollback. */
-struct model *model_new(struct term_vector2i size, int history);
+/* history is the history limit, as in term_options.scrollback. name is
+ * as in term_options.name. */
+struct model *model_new(struct term_vector2i size, int history, const char *name);
 void model_free(struct model *m);
 void model_feed(struct model *m, const char *s, size_t len, unsigned flags);
 bool model_resize(struct model *m, struct term_vector2i size);
diff --git a/tests/model_row_test.c b/tests/model_row_test.c
index 7afca05..ad4ac2c 100644
--- a/tests/model_row_test.c
+++ b/tests/model_row_test.c
@@ -5,7 +5,7 @@
 
 int main(void)
 {
-    struct model *m = model_new((struct term_vector2i){ .x = 10, .y = 3 }, 10);
+    struct model *m = model_new((struct term_vector2i){ .x = 10, .y = 3 }, 10, NULL);
     model_feed(m, "A\r\nB\r\nC\r\nD", strlen("A\r\nB\r\nC\r\nD"), 0);
     assert(model_history(m) == 1);
     assert(model_row(m, -1) == NULL);
diff --git a/tests/model_test.c b/tests/model_test.c
index 395097e..e94307c 100644
--- a/tests/model_test.c
+++ b/tests/model_test.c
@@ -256,7 +256,7 @@ static int run(const struct script *s, enum chunking chunks, uint64_t chunk_seed
         .callbacks = { .ud = &got, .reply = on_reply },
     };
     struct term *t = term_new(&opt);
-    struct model *m = model_new(s->size, s->history);
+    struct model *m = model_new(s->size, s->history, NULL);
     struct term_snapshot *snap = term_snapshot_new();
     if (!t || !snap) abort();
     uint64_t saved_rng = rng;
diff --git a/tests/osc_test.c b/tests/osc_test.c
index 41a9247..9d08157 100644
--- a/tests/osc_test.c
+++ b/tests/osc_test.c
@@ -104,6 +104,35 @@ static void reset_captures(void)
     notify_count = 0;
 }
 
+/* The notification default is term_options.name. A DCS +p does not change it. */
+static void test_host_name_notify(void)
+{
+    struct term_options opt = {
+        .size = { .x = 80, .y = 24 },
+        .scrollback = TEST_SCROLLBACK,
+        .name = "myterm",
+        .callbacks = { .notify = capture_notify },
+    };
+    struct term *t = term_new(&opt);
+    assert(t);
+    reset_captures();
+    write_seq(t, "\033]9;hello\007");
+    assert(notify_count == 1);
+    assert(!strcmp(notify_title, "myterm"));
+    assert(!strcmp(notify_body, "hello"));
+
+    write_seq(t, "\033P+p6f74686572\033\\");
+    reset_captures();
+    write_seq(t, "\033]9;again\007");
+    assert(notify_count == 1);
+    assert(!strcmp(notify_title, "myterm"));
+
+    write_seq(t, "\033]777;notify;Title;Body\007");
+    assert(notify_count == 2);
+    assert(!strcmp(notify_title, "Title"));
+    term_free(t);
+}
+
 static void test_osc52(void)
 {
     struct term *t = osc_test_term();
@@ -289,7 +318,7 @@ static void test_osc_misc(void)
 
     write_seq(t, "\033]9;hello there\033\\");
     assert(notify_count == 1);
-    assert(!strcmp(notify_title, "wsap_term"));
+    assert(!strcmp(notify_title, "term"));
     assert(!strcmp(notify_body, "hello there"));
     write_seq(t, "\033]9;4;3;50\007");
     assert(notify_count == 1);
@@ -450,6 +479,7 @@ int main(void)
     test_osc8();
     test_sgr_reset_keeps_link();
     test_osc_misc();
+    test_host_name_notify();
     test_osc_colors();
     test_osc_legacy_titles();
     test_palette_and_theme();
diff --git a/tests/term_test.c b/tests/term_test.c
index 66dbd96..e4ffb27 100644
--- a/tests/term_test.c
+++ b/tests/term_test.c
@@ -1485,6 +1485,32 @@ static void test_string_payloads(void)
     }
 }
 
+/* term_new() refuses a name that a DCS reply could echo unsafely. */
+static void test_host_name_rejected(void)
+{
+    static const char *const bad[] = {
+        "\033x", "a\tb", "\177", "\300", "a\nb",
+    };
+    char longest[65];
+    memset(longest, 'a', 64);
+    longest[64] = 0;
+    char fits[64];
+    memset(fits, 'b', 63);
+    fits[63] = 0;
+
+    for (size_t i = 0; i < sizeof(bad) / sizeof(bad[0]); i++) {
+        struct term_options opt = { .size = { .x = 10, .y = 3 }, .name = bad[i] };
+        assert(!term_new(&opt));
+    }
+    struct term_options opt = { .size = { .x = 10, .y = 3 }, .name = longest };
+    assert(!term_new(&opt));
+
+    opt.name = fits;
+    struct term *t = term_new(&opt);
+    assert(t);
+    term_free(t);
+}
+
 static void test_newline_policy_survives_reset(void)
 {
     static const char *const resets[] = { "\033c", "\033[!p", "\033[20l" };
@@ -1860,6 +1886,7 @@ int main(void)
     test_alt_erase_scrollback();
     test_snapshot_follows_new_terminal();
     test_bulk_rows_survive_edits();
+    test_host_name_rejected();
 
     assert(!strcmp(UNICODE_DATA_VERSION, "18.0.0"));
     assert(!strcmp(term_unicode_version(), UNICODE_DATA_VERSION));