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authorSimon Glass <sjg@chromium.org>2012-03-30 21:30:55 +0000
committerWolfgang Denk <wd@denx.de>2012-08-09 22:06:03 +0200
commitd51004a832a9784f4c6af5482d4dace6bfd938c4 (patch)
tree0817bdb51d21cd55b64e8eecdc5de7fd06e1a058 /common/main.c
parent213adf6dffe44d909db0efc5ecbdc047bb029438 (diff)
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Add run_command_list() to run a list of commands
This new function runs a list of commands separated by semicolon or newline. We move this out of cmd_source so that it can be used by other code. The PXE code also uses the new function. Suggested-by: Michael Walle <michael@walle.cc> Signed-off-by: Simon Glass <sjg@chromium.org>
Diffstat (limited to 'common/main.c')
-rw-r--r--common/main.c85
1 files changed, 85 insertions, 0 deletions
diff --git a/common/main.c b/common/main.c
index a933357..d96ba0a 100644
--- a/common/main.c
+++ b/common/main.c
@@ -30,6 +30,7 @@
#include <common.h>
#include <watchdog.h>
#include <command.h>
+#include <malloc.h>
#include <version.h>
#ifdef CONFIG_MODEM_SUPPORT
#include <malloc.h> /* for free() prototype */
@@ -1373,6 +1374,90 @@ int run_command(const char *cmd, int flag)
#endif
}
+#ifndef CONFIG_SYS_HUSH_PARSER
+/**
+ * Execute a list of command separated by ; or \n using the built-in parser.
+ *
+ * This function cannot take a const char * for the command, since if it
+ * finds newlines in the string, it replaces them with \0.
+ *
+ * @param cmd String containing list of commands
+ * @param flag Execution flags (CMD_FLAG_...)
+ * @return 0 on success, or != 0 on error.
+ */
+static int builtin_run_command_list(char *cmd, int flag)
+{
+ char *line, *next;
+ int rcode = 0;
+
+ /*
+ * Break into individual lines, and execute each line; terminate on
+ * error.
+ */
+ line = next = cmd;
+ while (*next) {
+ if (*next == '\n') {
+ *next = '\0';
+ /* run only non-empty commands */
+ if (*line) {
+ debug("** exec: \"%s\"\n", line);
+ if (builtin_run_command(line, 0) < 0) {
+ rcode = 1;
+ break;
+ }
+ }
+ line = next + 1;
+ }
+ ++next;
+ }
+ if (rcode == 0 && *line)
+ rcode = (builtin_run_command(line, 0) >= 0);
+
+ return rcode;
+}
+#endif
+
+int run_command_list(const char *cmd, int len, int flag)
+{
+ int need_buff = 1;
+ char *buff = (char *)cmd; /* cast away const */
+ int rcode = 0;
+
+ if (len == -1) {
+ len = strlen(cmd);
+#ifdef CONFIG_SYS_HUSH_PARSER
+ /* hush will never change our string */
+ need_buff = 0;
+#else
+ /* the built-in parser will change our string if it sees \n */
+ need_buff = strchr(cmd, '\n') != NULL;
+#endif
+ }
+ if (need_buff) {
+ buff = malloc(len + 1);
+ if (!buff)
+ return 1;
+ memcpy(buff, cmd, len);
+ buff[len] = '\0';
+ }
+#ifdef CONFIG_SYS_HUSH_PARSER
+ rcode = parse_string_outer(buff, FLAG_PARSE_SEMICOLON);
+#else
+ /*
+ * This function will overwrite any \n it sees with a \0, which
+ * is why it can't work with a const char *. Here we are making
+ * using of internal knowledge of this function, to avoid always
+ * doing a malloc() which is actually required only in a case that
+ * is pretty rare.
+ */
+ rcode = builtin_run_command_list(buff, flag);
+ if (need_buff)
+ free(buff);
+#endif
+
+ return rcode;
+}
+
/****************************************************************************/
#if defined(CONFIG_CMD_RUN)