*: make exec failure message more consistent

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

console-tools/openvt.c

@@ -98,7 +98,7 @@ static NOINLINE void vfork_child(char **argv)
 		//bb_error_msg("VT's sid %d", tcgetsid(0));
 		//bb_error_msg("VT's pgrp %d", tcgetpgrp(0));
 		BB_EXECVP(argv[0], argv);
-		bb_perror_msg_and_die("exec %s", argv[0]);
+		bb_perror_msg_and_die("can't execute '%s'", argv[0]);
 	}
 }
 

coreutils/chroot.c

@@ -30,6 +30,6 @@ int chroot_main(int argc UNUSED_PARAM, char **argv)
 		argv[1] = (char *) "-i";
 	}
 
-	BB_EXECVP(*argv, argv);
-	bb_perror_msg_and_die("can't execute '%s'", *argv);
+	BB_EXECVP(argv[0], argv);
+	bb_perror_msg_and_die("can't execute '%s'", argv[0]);
 }

coreutils/env.c

@@ -76,11 +76,11 @@ int env_main(int argc UNUSED_PARAM, char **argv)
 		++argv;
 	}
 
-	if (*argv) {
-		BB_EXECVP(*argv, argv);
+	if (argv[0]) {
+		BB_EXECVP(argv[0], argv);
 		/* SUSv3-mandated exit codes. */
 		xfunc_error_retval = (errno == ENOENT) ? 127 : 126;
-		bb_simple_perror_msg_and_die(*argv);
+		bb_perror_msg_and_die("can't execute '%s'", argv[0]);
 	}
 
 	if (environ) { /* clearenv() may set environ == NULL! */

coreutils/nice.c

@@ -47,9 +47,8 @@ int nice_main(int argc, char **argv)
 		}
 	}
 
-	BB_EXECVP(*argv, argv);		/* Now exec the desired program. */
-
+	BB_EXECVP(argv[0], argv);
 	/* The exec failed... */
 	xfunc_error_retval = (errno == ENOENT) ? 127 : 126; /* SUSv3 */
-	bb_simple_perror_msg_and_die(*argv);
+	bb_perror_msg_and_die("can't execute '%s'", argv[0]);
 }

coreutils/nohup.c

@@ -75,6 +75,7 @@ int nohup_main(int argc UNUSED_PARAM, char **argv)
 
 	signal(SIGHUP, SIG_IGN);
 
-	BB_EXECVP(argv[1], argv+1);
-	bb_simple_perror_msg_and_die(argv[1]);
+	argv++;
+	BB_EXECVP(argv[0], argv);
+	bb_perror_msg_and_die("can't execute '%s'", argv[0]);
 }

debianutils/start_stop_daemon.c

@@ -448,5 +448,5 @@ int start_stop_daemon_main(int argc UNUSED_PARAM, char **argv)
 	}
 #endif
 	execvp(startas, argv);
-	bb_perror_msg_and_die("can't start %s", startas);
+	bb_perror_msg_and_die("can't execute '%s'", startas);
 }

libbb/run_shell.c

@@ -86,5 +86,5 @@ void FAST_FUNC run_shell(const char *shell, int loginshell, const char *command,
 		freecon(current_sid);
 #endif
 	execv(shell, (char **) args);
-	bb_perror_msg_and_die("can't run '%s'", shell);
+	bb_perror_msg_and_die("can't execute '%s'", shell);
 }

libbb/vfork_daemon_rexec.c

@@ -249,7 +249,7 @@ void FAST_FUNC re_exec(char **argv)
 	 * "we have (already) re-execed, don't do it again" flag */
 	argv[0][0] |= 0x80;
 	execv(bb_busybox_exec_path, argv);
-	bb_perror_msg_and_die("exec %s", bb_busybox_exec_path);
+	bb_perror_msg_and_die("can't execute '%s'", bb_busybox_exec_path);
 }
 
 pid_t FAST_FUNC fork_or_rexec(char **argv)

mailutils/mail.c

@@ -67,8 +67,8 @@ void FAST_FUNC launch_helper(const char **argv)
 	if (!G.helper_pid) {
 		// child: try to execute connection helper
 		// NB: SIGCHLD & SIGALRM revert to SIG_DFL on exec
-		BB_EXECVP(*argv, (char **)argv);
-		_exit(127);
+		BB_EXECVP(argv[0], (char **)argv);
+		bb_perror_msg_and_die("can't execute '%s'", argv[0]);
 	}
 
 	// parent

mailutils/mime.c

@@ -288,8 +288,8 @@ static int parse(const char *boundary, char **argv)
 					xsetenv("CHARSET", charset);
 					xsetenv("ENCODING", encoding);
 					xsetenv("FILENAME", filename);
-					BB_EXECVP(*argv, argv);
-					_exit(EXIT_FAILURE);
+					BB_EXECVP(argv[0], argv);
+					bb_perror_msg_and_die("can't execute '%s'", argv[0]);
 				}
 				// parent dumps to fd[1]
 				close(fd[0]);

miscutils/chrt.c

@@ -115,9 +115,9 @@ int chrt_main(int argc UNUSED_PARAM, char **argv)
 	if (sched_setscheduler(pid, policy, &sp) < 0)
 		bb_perror_msg_and_die("can't %cet pid %d's policy", 's', pid);
 
-	if (!*argv) /* "-p <priority> <pid> [...]" */
+	if (!argv[0]) /* "-p <priority> <pid> [...]" */
 		goto print_rt_info;
 
-	BB_EXECVP(*argv, argv);
-	bb_simple_perror_msg_and_die(*argv);
+	BB_EXECVP(argv[0], argv);
+	bb_perror_msg_and_die("can't execute '%s'", argv[0]);
 }

miscutils/ionice.c

@@ -89,9 +89,9 @@ int ionice_main(int argc UNUSED_PARAM, char **argv)
 		pri |= (ioclass << IOPRIO_CLASS_SHIFT);
 		if (ioprio_set(IOPRIO_WHO_PROCESS, pid, pri) == -1)
 			bb_perror_msg_and_die("ioprio_%cet", 's');
-		if (*argv) {
-			BB_EXECVP(*argv, argv);
-			bb_simple_perror_msg_and_die(*argv);
+		if (argv[0]) {
+			BB_EXECVP(argv[0], argv);
+			bb_perror_msg_and_die("can't execute '%s'", argv[0]);
 		}
 	}
 

miscutils/setsid.c

@@ -44,6 +44,7 @@ int setsid_main(int argc UNUSED_PARAM, char **argv)
 		setsid();
 	}
 
-	BB_EXECVP(argv[1], argv + 1);
-	bb_simple_perror_msg_and_die(argv[1]);
+	argv++;
+	BB_EXECVP(argv[0], argv);
+	bb_perror_msg_and_die("can't execute '%s'", argv[0]);
 }

miscutils/taskset.c

@@ -129,9 +129,9 @@ int taskset_main(int argc UNUSED_PARAM, char **argv)
 	if (sched_setaffinity(pid, sizeof(mask), &mask))
 		bb_perror_msg_and_die("can't %cet pid %d's affinity", 's', pid);
 
-	if (!*argv) /* "-p <aff> <pid> [...ignored...]" */
+	if (!argv[0]) /* "-p <aff> <pid> [...ignored...]" */
 		goto print_aff; /* print new affinity and exit */
 
-	BB_EXECVP(*argv, argv);
-	bb_simple_perror_msg_and_die(*argv);
+	BB_EXECVP(argv[0], argv);
+	bb_perror_msg_and_die("can't execute '%s'", argv[0]);
 }

miscutils/time.c

@@ -380,7 +380,7 @@ static void run_command(char *const *cmd, resource_t *resp)
 		   versus merely warnings if the cast is left off.  */
 		BB_EXECVP(cmd[0], cmd);
 		xfunc_error_retval = (errno == ENOENT ? 127 : 126);
-		bb_error_msg_and_die("can't run '%s'", cmd[0]);
+		bb_perror_msg_and_die("can't execute '%s'", cmd[0]);
 	}
 
 	/* Have signals kill the child but not self (if possible).  */

miscutils/timeout.c

@@ -111,5 +111,5 @@ int timeout_main(int argc UNUSED_PARAM, char **argv)
 	argv[1] = sv2;
 #endif
 	BB_EXECVP(argv[0], argv);
-	bb_perror_msg_and_die("exec '%s'", argv[0]);
+	bb_perror_msg_and_die("can't execute '%s'", argv[0]);
 }

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]);
 }
 
 /*

printutils/lpd.c

@@ -181,8 +181,8 @@ int lpd_main(int argc UNUSED_PARAM, char *argv[])
 			// this call reopens stdio fds to "/dev/null"
 			// (no daemonization is done)
 			bb_daemonize_or_rexec(DAEMON_DEVNULL_STDIO | DAEMON_ONLY_SANITIZE, NULL);
-			BB_EXECVP(*argv, argv);
-			exit(127);
+			BB_EXECVP(argv[0], argv);
+			bb_perror_msg_and_die("can't execute '%s'", argv[0]);
 		}
 
 		// validate input.

runit/chpst.c

@@ -383,5 +383,5 @@ int chpst_main(int argc UNUSED_PARAM, char **argv)
 		close(STDERR_FILENO);
 
 	BB_EXECVP(argv[0], argv);
-	bb_perror_msg_and_die("exec %s", argv[0]);
+	bb_perror_msg_and_die("can't execute '%s'", argv[0]);
 }

selinux/runcon.c

@@ -133,6 +133,5 @@ int runcon_main(int argc UNUSED_PARAM, char **argv)
 				     context_str(con));
 
 	execvp(argv[0], argv);
-
 	bb_perror_msg_and_die("can't execute '%s'", argv[0]);
 }