[U-Boot] [PATCH v2] main: unify command parsing functions

[Michael Walle]

Introduce source_commands() which incorporates run_command2() and parts of
source().

All command script are now treated the same, that is newlines are accepted
within a command script and variable.

Signed-off-by: Michael Walle <michael at walle.cc>
Cc: Wolfgang Denk <wd at denx.de>
Cc: Mike Frysinger <vapier at gentoo.org>
---

This patch supersedes "cmd_source: introduce run_script()"
v2:
 - argument is now const char*
 - unify run_commands2() and source()
 - allow newlines in command variables
 - use strsep()

 common/cmd_pxe.c    |    2 +-
 common/cmd_source.c |   32 +------------------------------
 common/main.c       |   52 ++++++++++++++++++++++++++++++++++----------------
 include/common.h    |    4 +--
 4 files changed, 38 insertions(+), 52 deletions(-)

diff --git a/common/cmd_pxe.c b/common/cmd_pxe.c
index 7c0cb66..347fde1 100644
--- a/common/cmd_pxe.c
+++ b/common/cmd_pxe.c
@@ -537,7 +537,7 @@ static int label_localboot(struct pxe_label *label)
 
 	printf("running: %s\n", dupcmd);
 
-	ret = run_command2(dupcmd, 0);
+	ret = source_commands(dupcmd, 0);
 
 	free(dupcmd);
 
diff --git a/common/cmd_source.c b/common/cmd_source.c
index 16a627a..33242df 100644
--- a/common/cmd_source.c
+++ b/common/cmd_source.c
@@ -160,38 +160,8 @@ source (ulong addr, const char *fit_uname)
 	memmove (cmd, (char *)data, len);
 	*(cmd + len) = 0;
 
-#ifdef CONFIG_SYS_HUSH_PARSER /*?? */
-	rcode = parse_string_outer (cmd, FLAG_PARSE_SEMICOLON);
-#else
-	{
-		char *line = cmd;
-		char *next = cmd;
+	rcode = source_commands(cmd, 0);
 
-		/*
-		 * break into individual lines,
-		 * and execute each line;
-		 * terminate on error.
-		 */
-		while (*next) {
-			if (*next == '\n') {
-				*next = '\0';
-				/* run only non-empty commands */
-				if (*line) {
-					debug ("** exec: \"%s\"\n",
-						line);
-					if (run_command (line, 0) < 0) {
-						rcode = 1;
-						break;
-					}
-				}
-				line = next + 1;
-			}
-			++next;
-		}
-		if (rcode == 0 && *line)
-			rcode = (run_command(line, 0) >= 0);
-	}
-#endif
 	free (cmd);
 	return rcode;
 }
diff --git a/common/main.c b/common/main.c
index e96c95a..cc25d38 100644
--- a/common/main.c
+++ b/common/main.c
@@ -266,26 +266,44 @@ int abortboot(int bootdelay)
 # endif	/* CONFIG_AUTOBOOT_KEYED */
 #endif	/* CONFIG_BOOTDELAY >= 0  */
 
+static inline int _run_command(const char *cmd, int flag)
+{
+#ifndef CONFIG_SYS_HUSH_PARSER
+	return (run_command(cmd, flag) == -1);
+#else
+	flag = FLAG_PARSE_SEMICOLON | FLAG_EXIT_FROM_LOOP;
+	return parse_string_outer(cmd, flag);
+#endif
+}
+
 /*
+ * Run a series of commands separated by '\n'.
+ *
  * Return 0 on success, or != 0 on error.
  */
-#ifndef CONFIG_CMD_PXE
-static inline
-#endif
-int run_command2(const char *cmd, int flag)
+int source_commands(const char *commands, int flag)
 {
-#ifndef CONFIG_SYS_HUSH_PARSER
+	int rcode = 0;
+	char *_commands = strdup(commands);
+	char *stringp = _commands;
+	char *line;
+
 	/*
-	 * run_command can return 0 or 1 for success, so clean up its result.
+	 * break into individual lines and execute each line;
+	 * terminate on error.
 	 */
-	if (run_command(cmd, flag) == -1)
-		return 1;
+	while ((line = strsep(&stringp, "\n"))) {
+		/* skip empty lines */
+		if (*line == '\0')
+			continue;
+		if (_run_command(line, flag)) {
+			rcode = 1;
+			break;
+		}
+	}
 
-	return 0;
-#else
-	return parse_string_outer(cmd,
-			FLAG_PARSE_SEMICOLON | FLAG_EXIT_FROM_LOOP);
-#endif
+	free(_commands);
+	return rcode;
 }
 
 /****************************************************************************/
@@ -354,7 +372,7 @@ void main_loop (void)
 		int prev = disable_ctrlc(1);	/* disable Control C checking */
 # endif
 
-		run_command2(p, 0);
+		source_commands(p, 0);
 
 # ifdef CONFIG_AUTOBOOT_KEYED
 		disable_ctrlc(prev);	/* restore Control C checking */
@@ -399,7 +417,7 @@ void main_loop (void)
 		int prev = disable_ctrlc(1);	/* disable Control C checking */
 # endif
 
-		run_command2(s, 0);
+		source_commands(s, 0);
 
 # ifdef CONFIG_AUTOBOOT_KEYED
 		disable_ctrlc(prev);	/* restore Control C checking */
@@ -410,7 +428,7 @@ void main_loop (void)
 	if (menukey == CONFIG_MENUKEY) {
 		s = getenv("menucmd");
 		if (s)
-			run_command2(s, 0);
+			source_commands(s, 0);
 	}
 #endif /* CONFIG_MENUKEY */
 #endif /* CONFIG_BOOTDELAY */
@@ -1408,7 +1426,7 @@ int do_run (cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
 			return 1;
 		}
 
-		if (run_command2(arg, flag) != 0)
+		if (source_commands(arg, flag) != 0)
 			return 1;
 	}
 	return 0;
diff --git a/include/common.h b/include/common.h
index 3df1def..c2e7813 100644
--- a/include/common.h
+++ b/include/common.h
@@ -261,9 +261,7 @@ int	print_buffer (ulong addr, void* data, uint width, uint count, uint linelen);
 /* common/main.c */
 void	main_loop	(void);
 int	run_command	(const char *cmd, int flag);
-#ifdef CONFIG_CMD_PXE
-int run_command2(const char *cmd, int flag);
-#endif
+int source_commands(const char *cmd, int flag);
 int	readline	(const char *const prompt);
 int	readline_into_buffer	(const char *const prompt, char * buffer);
 int	parse_line (char *, char *[]);
-- 
1.7.2.5