Added run_command() api to replace system() and popen()

3 files changed, 27 insertions, 1 deletions

diff --git a/kernel/register.cc b/kernel/register.cc
index 9452eb355..33c129d83 100644
--- a/kernel/register.cc
+++ b/kernel/register.cc
@@ -159,7 +159,7 @@ void Pass::call(RTLIL::Design *design, std::string command)
 				cmd_buf.back() == '\r' || cmd_buf.back() == '\n'))
 			cmd_buf.resize(cmd_buf.size()-1);
 		log_header("Shell command: %s\n", cmd_buf.c_str());
-		int retCode = system(cmd_buf.c_str());
+		int retCode = run_command(cmd_buf);
 		if (retCode != 0)
 			log_cmd_error("Shell command returned error code %d.\n", retCode);
 		return;
diff --git a/kernel/yosys.cc b/kernel/yosys.cc
index a40ad4372..50da13ae7 100644
--- a/kernel/yosys.cc
+++ b/kernel/yosys.cc
@@ -182,6 +182,31 @@ int readsome(std::istream &f, char *s, int n)
 	return rc;
 }
 
+int run_command(const std::string &command, std::function<void(const std::string&)> process_line)
+{
+	if (!process_line)
+		return system(command.c_str());
+
+	FILE *f = popen(command.c_str(), "r");
+	if (f == nullptr)
+		return -1;
+
+	std::string line;
+	char logbuf[128];
+	while (fgets(logbuf, 128, f) != NULL) {
+		line += logbuf;
+		if (!line.empty() && line.back() == '\n')
+			process_line(line), line.clear();
+	}
+	if (!line.empty())
+		process_line(line);
+
+	int ret = pclose(f);
+	if (ret < 0)
+		return -1;
+	return WEXITSTATUS(ret);
+}
+
 int GetSize(RTLIL::Wire *wire)
 {
 	return wire->width;
diff --git a/kernel/yosys.h b/kernel/yosys.h
index d38e60ceb..fcf60f9f1 100644
--- a/kernel/yosys.h
+++ b/kernel/yosys.h
@@ -87,6 +87,7 @@ std::string vstringf(const char *fmt, va_list ap);
 std::string next_token(std::string &text, const char *sep);
 bool patmatch(const char *pattern, const char *string);
 int readsome(std::istream &f, char *s, int n);
+int run_command(const std::string &command, std::function<void(const std::string&)> process_line = std::function<void(const std::string&)>());
 
 template<typename T> int GetSize(const T &obj) { return obj.size(); }
 int GetSize(RTLIL::Wire *wire);