Patches by Pantelis Antoniou, 16 Apr 2004:
- add support for a new version of an Intracom board and fix
various other things on others.
- add verify support to the crc32 command (define
CONFIG_CRC32_VERIFY to enable it)
- fix FEC driver for MPC8xx systems:
1. fix compilation problems for boards that use dynamic
allocation of DPRAM
2. shut down FEC after network transfers
- HUSH parser fixes:
1. A new test command was added. This is a simplified version of
the one in the bourne shell.
2. A new exit command was added which terminates the current
executing script.
3. Fixed handing of $? (exit code of last executed command)
diff --git a/common/hush.c b/common/hush.c
index eeb970c..47680ed 100644
--- a/common/hush.c
+++ b/common/hush.c
@@ -290,6 +290,7 @@
unsigned int global_argc;
#endif
unsigned int last_return_code;
+int nesting_level;
#ifndef __U_BOOT__
extern char **environ; /* This is in <unistd.h>, but protected with __USE_GNU */
#endif
@@ -416,7 +417,9 @@
static int b_addchr(o_string *o, int ch);
static void b_reset(o_string *o);
static int b_addqchr(o_string *o, int ch, int quote);
+#ifndef __U_BOOT__
static int b_adduint(o_string *o, unsigned int i);
+#endif
/* in_str manipulations: */
static int static_get(struct in_str *i);
static int static_peek(struct in_str *i);
@@ -936,6 +939,7 @@
return p + 1;
}
+#ifndef __U_BOOT__
static int b_adduint(o_string *o, unsigned int i)
{
int r;
@@ -944,6 +948,7 @@
do r=b_addchr(o, *p++); while (r==0 && *p);
return r;
}
+#endif
static int static_get(struct in_str *i)
{
@@ -1921,6 +1926,10 @@
}
last_return_code=rcode;
#else
+ if (rcode < -1) {
+ last_return_code = -rcode - 2;
+ return -2; /* exit */
+ }
last_return_code=(rcode == 0) ? 0 : 1;
#endif
#ifndef __U_BOOT__
@@ -2145,6 +2154,10 @@
}
#endif
+#ifdef __U_BOOT__
+static char *get_dollar_var(char ch);
+#endif
+
/* This is used to get/check local shell variables */
static char *get_local_var(const char *s)
{
@@ -2152,6 +2165,12 @@
if (!s)
return NULL;
+
+#ifdef __U_BOOT__
+ if (*s == '$')
+ return get_dollar_var(s[1]);
+#endif
+
for (cur = top_vars; cur; cur=cur->next)
if(strcmp(cur->name, s)==0)
return cur->value;
@@ -2168,12 +2187,19 @@
int result=0;
struct variables *cur;
+#ifdef __U_BOOT__
+ /* might be possible! */
+ if (!isalpha(*s))
+ return -1;
+#endif
+
name=strdup(s);
#ifdef __U_BOOT__
if (getenv(name) != NULL) {
printf ("ERROR: "
"There is a global environment variable with the same name.\n");
+ free(name);
return -1;
}
#endif
@@ -2278,7 +2304,10 @@
static int is_assignment(const char *s)
{
- if (s==NULL || !isalpha(*s)) return 0;
+ if (s == NULL)
+ return 0;
+
+ if (!isalpha(*s)) return 0;
++s;
while(isalnum(*s) || *s=='_') ++s;
return *s=='=';
@@ -2749,15 +2778,35 @@
* see the bash man page under "Parameter Expansion" */
static char *lookup_param(char *src)
{
- char *p=NULL;
- if (src) {
+ char *p;
+
+ if (!src)
+ return NULL;
+
p = getenv(src);
if (!p)
p = get_local_var(src);
- }
+
return p;
}
+#ifdef __U_BOOT__
+static char *get_dollar_var(char ch)
+{
+ static char buf[40];
+
+ buf[0] = '\0';
+ switch (ch) {
+ case '?':
+ sprintf(buf, "%u", (unsigned int)last_return_code);
+ break;
+ default:
+ return NULL;
+ }
+ return buf;
+}
+#endif
+
/* return code: 0 for OK, 1 for syntax error */
static int handle_dollar(o_string *dest, struct p_context *ctx, struct in_str *input)
{
@@ -2799,7 +2848,15 @@
break;
#endif
case '?':
+#ifndef __U_BOOT__
b_adduint(dest,last_return_code);
+#else
+ ctx->child->sp++;
+ b_addchr(dest, SPECIAL_VAR_SYMBOL);
+ b_addchr(dest, '$');
+ b_addchr(dest, '?');
+ b_addchr(dest, SPECIAL_VAR_SYMBOL);
+#endif
advance = 1;
break;
#ifndef __U_BOOT__
@@ -2885,8 +2942,11 @@
if (input->__promptme == 0) return 1;
#endif
next = (ch == '\n') ? 0 : b_peek(input);
- debug_printf("parse_stream: ch=%c (%d) m=%d quote=%d\n",
- ch,ch,m,dest->quote);
+
+ debug_printf("parse_stream: ch=%c (%d) m=%d quote=%d - %c\n",
+ ch >= ' ' ? ch : '.', ch, m,
+ dest->quote, ctx->stack == NULL ? '*' : '.');
+
if (m==0 || ((m==1 || m==2) && dest->quote)) {
b_addqchr(dest, ch, dest->quote);
} else {
@@ -3107,7 +3167,18 @@
#ifndef __U_BOOT__
run_list(ctx.list_head);
#else
- if (((code = run_list(ctx.list_head)) == -1))
+ code = run_list(ctx.list_head);
+ if (code == -2) { /* exit */
+ b_free(&temp);
+ code = 0;
+ /* XXX hackish way to not allow exit from main loop */
+ if (inp->peek == file_peek) {
+ printf("exit not allowed from main input shell.\n");
+ continue;
+ }
+ break;
+ }
+ if (code == -1)
flag_repeat = 0;
#endif
} else {
