*: make exec failure message more consistent

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

networking/httpd.c

@@ -1474,7 +1474,7 @@ static void send_cgi_and_exit(
 		 * in the current directory */
 		execv(argv[0], argv);
 		if (verbose)
-			bb_perror_msg("exec %s", argv[0]);
+			bb_perror_msg_and_die("can't execute '%s'", argv[0]);
  error_execing_cgi:
 		/* send to stdout
 		 * (we are CGI here, our stdout is pumped to the net) */

networking/ifupdown.c

@@ -1053,7 +1053,7 @@ static int popen2(FILE **in, FILE **out, char *command, char *param)
 		xmove_fd(infd.rd, 0);
 		xmove_fd(outfd.wr, 1);
 		BB_EXECVP(command, argv);
-		_exit(127);
+		bb_perror_msg_and_die("can't execute '%s'", command);
 	}
 	/* parent */
 	close(infd.rd);

networking/inetd.c

@@ -1380,7 +1380,7 @@ int inetd_main(int argc UNUSED_PARAM, char **argv)
 			sigaction_set(SIGPIPE, &saved_pipe_handler);
 			restore_sigmask(&omask);
 			BB_EXECVP(sep->se_program, sep->se_argv);
-			bb_perror_msg("exec %s", sep->se_program);
+			bb_perror_msg_and_die("can't execute '%s'", sep->se_program);
  do_exit1:
 			/* eat packet in udp case */
 			if (sep->se_socktype != SOCK_STREAM)

networking/nc_bloaty.c

@@ -230,7 +230,7 @@ static int doexec(char **proggie)
 	/* dup2(0, 2); - do we *really* want this? NO!
 	 * exec'ed prog can do it yourself, if needed */
 	execvp(proggie[0], proggie);
-	bb_perror_msg_and_die("exec");
+	bb_perror_msg_and_die("can't execute '%s'", proggie[0]);
 }
 
 /* connect_w_timeout:

networking/tcpudp.c

@@ -504,7 +504,7 @@ int tcpudpsvd_main(int argc UNUSED_PARAM, char **argv)
 #else
 	BB_EXECVP(argv[0], argv);
 #endif
-	bb_perror_msg_and_die("exec '%s'", argv[0]);
+	bb_perror_msg_and_die("can't execute '%s'", argv[0]);
 }
 
 /*