Improve error logging in ThreadExecutor

cli/threadexecutor.cpp

@@ -30,6 +30,7 @@
 #include <cstdio>
 #include <errno.h>
 #include <time.h>
+#include <cstring>
 #endif
 
 ThreadExecutor::ThreadExecutor(const std::vector<std::string> &filenames, const std::map<std::string, long> &filesizes, Settings &settings, ErrorLogger &errorLogger)
@@ -137,25 +138,25 @@ unsigned int ThreadExecutor::check()
         if (i < _filenames.size() && rpipes.size() < _settings._jobs) {
             int pipes[2];
             if (pipe(pipes) == -1) {
-                perror("pipe");
+                std::cerr << "pipe() failed: "<< strerror(errno) << std::endl;
-                exit(1);
+                exit(EXIT_FAILURE);
             }
 
             int flags = 0;
             if ((flags = fcntl(pipes[0], F_GETFL, 0)) < 0) {
-                perror("fcntl");
+                std::cerr << "fcntl(F_GETFL) failed: "<< strerror(errno) << std::endl;
-                exit(1);
+                exit(EXIT_FAILURE);
             }
 
             if (fcntl(pipes[0], F_SETFL, flags | O_NONBLOCK) < 0) {
-                perror("fcntl");
+                std::cerr << "fcntl(F_SETFL) failed: "<< strerror(errno) << std::endl;
-                exit(1);
+                exit(EXIT_FAILURE);
             }
 
             pid_t pid = fork();
             if (pid < 0) {
                 // Error
-                std::cerr << "Failed to create child process" << std::endl;
+                std::cerr << "Failed to create child process: "<< strerror(errno) << std::endl;
                 exit(EXIT_FAILURE);
             } else if (pid == 0) {
                 close(pipes[0]);