Add adb flag to disable execution error logs

In addition to disable stdout and stderr of the child process, add a
flag to disable the error log printed by scrcpy if the command failed.

This will we useful for commands which are expected to fail in some
cases (like "adb disconnect" if the device is not connected).

PR #2827 <https://github.com/Genymobile/scrcpy/pull/2827>

app/src/adb.c

@@ -112,18 +112,25 @@ show_adb_err_msg(enum sc_process_result err, const char *const argv[]) {
 }
 
 static bool
-process_check_success_internal(sc_pid pid, const char *name, bool close) {
+process_check_success_internal(sc_pid pid, const char *name, bool close,
+                               unsigned flags) {
+    bool log_errors = !(flags & SC_ADB_NO_LOGERR);
+
     if (pid == SC_PROCESS_NONE) {
-        LOGE("Could not execute \"%s\"", name);
+        if (log_errors) {
+            LOGE("Could not execute \"%s\"", name);
+        }
         return false;
     }
     sc_exit_code exit_code = sc_process_wait(pid, close);
     if (exit_code) {
-        if (exit_code != SC_EXIT_CODE_NONE) {
-            LOGE("\"%s\" returned with value %" SC_PRIexitcode, name,
-                 exit_code);
-        } else {
-            LOGE("\"%s\" exited unexpectedly", name);
+        if (log_errors) {
+            if (exit_code != SC_EXIT_CODE_NONE) {
+                LOGE("\"%s\" returned with value %" SC_PRIexitcode, name,
+                     exit_code);
+            } else {
+                LOGE("\"%s\" exited unexpectedly", name);
+            }
         }
         return false;
     }
@@ -131,14 +138,15 @@ process_check_success_internal(sc_pid pid, const char *name, bool close) {
 }
 
 static bool
-process_check_success_intr(struct sc_intr *intr, sc_pid pid, const char *name) {
+process_check_success_intr(struct sc_intr *intr, sc_pid pid, const char *name,
+                           unsigned flags) {
     if (!sc_intr_set_process(intr, pid)) {
         // Already interrupted
         return false;
     }
 
     // Always pass close=false, interrupting would be racy otherwise
-    bool ret = process_check_success_internal(pid, name, false);
+    bool ret = process_check_success_internal(pid, name, false, flags);
 
     sc_intr_set_process(intr, SC_PROCESS_NONE);
 
@@ -217,7 +225,7 @@ adb_forward(struct sc_intr *intr, const char *serial, uint16_t local_port,
     const char *const adb_cmd[] = {"forward", local, remote};
 
     sc_pid pid = adb_execute(serial, adb_cmd, ARRAY_LEN(adb_cmd), flags);
-    return process_check_success_intr(intr, pid, "adb forward");
+    return process_check_success_intr(intr, pid, "adb forward", flags);
 }
 
 bool
@@ -228,7 +236,7 @@ adb_forward_remove(struct sc_intr *intr, const char *serial,
     const char *const adb_cmd[] = {"forward", "--remove", local};
 
     sc_pid pid = adb_execute(serial, adb_cmd, ARRAY_LEN(adb_cmd), flags);
-    return process_check_success_intr(intr, pid, "adb forward --remove");
+    return process_check_success_intr(intr, pid, "adb forward --remove", flags);
 }
 
 bool
@@ -242,7 +250,7 @@ adb_reverse(struct sc_intr *intr, const char *serial,
     const char *const adb_cmd[] = {"reverse", remote, local};
 
     sc_pid pid = adb_execute(serial, adb_cmd, ARRAY_LEN(adb_cmd), flags);
-    return process_check_success_intr(intr, pid, "adb reverse");
+    return process_check_success_intr(intr, pid, "adb reverse", flags);
 }
 
 bool
@@ -253,7 +261,7 @@ adb_reverse_remove(struct sc_intr *intr, const char *serial,
     const char *const adb_cmd[] = {"reverse", "--remove", remote};
 
     sc_pid pid = adb_execute(serial, adb_cmd, ARRAY_LEN(adb_cmd), flags);
-    return process_check_success_intr(intr, pid, "adb reverse --remove");
+    return process_check_success_intr(intr, pid, "adb reverse --remove", flags);
 }
 
 bool
@@ -281,7 +289,7 @@ adb_push(struct sc_intr *intr, const char *serial, const char *local,
     free((void *) local);
 #endif
 
-    return process_check_success_intr(intr, pid, "adb push");
+    return process_check_success_intr(intr, pid, "adb push", flags);
 }
 
 bool
@@ -303,7 +311,7 @@ adb_install(struct sc_intr *intr, const char *serial, const char *local,
     free((void *) local);
 #endif
 
-    return process_check_success_intr(intr, pid, "adb install");
+    return process_check_success_intr(intr, pid, "adb install", flags);
 }
 
 char *
@@ -321,7 +329,7 @@ adb_get_serialno(struct sc_intr *intr, unsigned flags) {
     ssize_t r = sc_pipe_read_all_intr(intr, pid, pout, buf, sizeof(buf));
     sc_pipe_close(pout);
 
-    bool ok = process_check_success_intr(intr, pid, "adb get-serialno");
+    bool ok = process_check_success_intr(intr, pid, "adb get-serialno", flags);
     if (!ok) {
         return NULL;
     }

app/src/adb.h

@@ -10,6 +10,7 @@
 
 #define SC_ADB_NO_STDOUT (1 << 0)
 #define SC_ADB_NO_STDERR (1 << 1)
+#define SC_ADB_NO_LOGERR (1 << 2)
 
 sc_pid
 adb_execute(const char *serial, const char *const adb_cmd[], size_t len,