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authorDenis Vlasenko2007-05-24 13:22:47 +0000
committerDenis Vlasenko2007-05-24 13:22:47 +0000
commit5a1437d8355f44702d9ff85311cfd11f2625217c (patch)
treeb14078bad2688b4857df720a3766b0f6c0d3ed61 /shell/hush.c
parentcd7f4d27a2ccda62c3cd41c980a75a1aa59d8534 (diff)
downloadbusybox-5a1437d8355f44702d9ff85311cfd11f2625217c.zip
busybox-5a1437d8355f44702d9ff85311cfd11f2625217c.tar.gz
hush: fix segfaulting syntax error in interactive hush
Diffstat (limited to 'shell/hush.c')
-rw-r--r--shell/hush.c52
1 files changed, 29 insertions, 23 deletions
diff --git a/shell/hush.c b/shell/hush.c
index 1ff7b0d..d96615d 100644
--- a/shell/hush.c
+++ b/shell/hush.c
@@ -305,8 +305,8 @@ struct in_str {
char eof_flag; /* meaningless if ->p == NULL */
char peek_buf[2];
#if ENABLE_HUSH_INTERACTIVE
- int __promptme;
- int promptmode;
+ smallint promptme;
+ smallint promptmode; /* 0: PS1, 1: PS2 */
#endif
FILE *file;
int (*get) (struct in_str *);
@@ -427,15 +427,23 @@ enum { run_list_level = 0 };
/* Normal */
static void syntax(const char *msg)
{
- (interactive_fd ? bb_error_msg : bb_error_msg_and_die)
- (msg ? "%s: %s" : "syntax error", "syntax error", msg);
+ /* Was using fancy stuff:
+ * (interactive_fd ? bb_error_msg : bb_error_msg_and_die)(...params...)
+ * but it SEGVs. ?! Oh well... explicit temp ptr works around that */
+ void (*fp)(const char *s, ...);
+
+ fp = (interactive_fd ? bb_error_msg : bb_error_msg_and_die);
+ fp(msg ? "%s: %s" : "syntax error", "syntax error", msg);
}
+
#else
/* Debug */
static void syntax_lineno(int line)
{
- (interactive_fd ? bb_error_msg : bb_error_msg_and_die)
- ("syntax error hush.c:%d", line);
+ void (*fp)(const char *s, ...);
+
+ fp = (interactive_fd ? bb_error_msg : bb_error_msg_and_die);
+ fp("syntax error hush.c:%d", line);
}
#define syntax(str) syntax_lineno(__LINE__)
#endif
@@ -1136,20 +1144,17 @@ static const char* setup_prompt_string(int promptmode)
debug_printf("setup_prompt_string %d ", promptmode);
#if !ENABLE_FEATURE_EDITING_FANCY_PROMPT
/* Set up the prompt */
- if (promptmode == 1) {
- char *ns;
+ if (promptmode == 0) { /* PS1 */
free((char*)PS1);
- ns = xmalloc(strlen(cwd)+4);
- sprintf(ns, "%s %s", cwd, (geteuid() != 0) ? "$ " : "# ");
- prompt_str = ns;
- PS1 = ns;
+ PS1 = xasprintf("%s %c ", cwd, (geteuid() != 0) ? '$' : '#');
+ prompt_str = PS1;
} else {
prompt_str = PS2;
}
#else
- prompt_str = (promptmode == 1) ? PS1 : PS2;
+ prompt_str = (promptmode == 0) ? PS1 : PS2;
#endif
- debug_printf("result %s\n", prompt_str);
+ debug_printf("result '%s'\n", prompt_str);
return prompt_str;
}
@@ -1199,12 +1204,12 @@ static int file_get(struct in_str *i)
/* need to double check i->file because we might be doing something
* more complicated by now, like sourcing or substituting. */
#if ENABLE_HUSH_INTERACTIVE
- if (interactive_fd && i->__promptme && i->file == stdin) {
+ if (interactive_fd && i->promptme && i->file == stdin) {
do {
get_user_input(i);
} while (!*i->p); /* need non-empty line */
- i->promptmode = 2;
- i->__promptme = 0;
+ i->promptmode = 1; /* PS2 */
+ i->promptme = 0;
goto take_cached;
}
#endif
@@ -1213,7 +1218,7 @@ static int file_get(struct in_str *i)
debug_printf("file_get: got a '%c' %d\n", ch, ch);
#if ENABLE_HUSH_INTERACTIVE
if (ch == '\n')
- i->__promptme = 1;
+ i->promptme = 1;
#endif
return ch;
}
@@ -1243,8 +1248,8 @@ static void setup_file_in_str(struct in_str *i, FILE *f)
i->peek = file_peek;
i->get = file_get;
#if ENABLE_HUSH_INTERACTIVE
- i->__promptme = 1;
- i->promptmode = 1;
+ i->promptme = 1;
+ i->promptmode = 0; /* PS1 */
#endif
i->file = f;
i->p = NULL;
@@ -1255,8 +1260,8 @@ static void setup_string_in_str(struct in_str *i, const char *s)
i->peek = static_peek;
i->get = static_get;
#if ENABLE_HUSH_INTERACTIVE
- i->__promptme = 1;
- i->promptmode = 1;
+ i->promptme = 1;
+ i->promptmode = 0; /* PS1 */
#endif
i->p = s;
i->eof_flag = 0;
@@ -3246,6 +3251,7 @@ static int parse_group(o_string *dest, struct p_context *ctx,
child->subshell = 1;
}
rcode = parse_stream(dest, &sub, input, endch);
+//vda: err chk?
done_word(dest, &sub); /* finish off the final word in the subcontext */
done_pipe(&sub, PIPE_SEQ); /* and the final command there, too */
child->group = sub.list_head;
@@ -3588,7 +3594,7 @@ static int parse_and_run_stream(struct in_str *inp, int parse_flag)
if (!(parse_flag & PARSEFLAG_SEMICOLON) || (parse_flag & PARSEFLAG_REPARSING))
set_in_charmap(";$&|", CHAR_ORDINARY);
#if ENABLE_HUSH_INTERACTIVE
- inp->promptmode = 1;
+ inp->promptmode = 0; /* PS1 */
#endif
/* We will stop & execute after each ';' or '\n'.
* Example: "sleep 9999; echo TEST" + ctrl-C: