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-rw-r--r--shell/ash.c21
1 files changed, 12 insertions, 9 deletions
diff --git a/shell/ash.c b/shell/ash.c
index dc26bc142..e30d7fe67 100644
--- a/shell/ash.c
+++ b/shell/ash.c
@@ -6752,6 +6752,10 @@ evalvar(char *p, int flag, struct strlist *var_str_list)
varflags = (unsigned char) *p++;
subtype = varflags & VSTYPE;
+
+ if (!subtype)
+ raise_error_syntax("bad substitution");
+
quoted = flag & EXP_QUOTED;
var = p;
easy = (!quoted || (*var == '@' && shellparam.nparam));
@@ -11699,7 +11703,7 @@ parseredir: {
parsesub: {
unsigned char subtype;
int typeloc;
- int flags;
+ int flags = 0;
c = pgetc_eatbnl();
if (c > 255 /* PEOA or PEOF */
@@ -11759,15 +11763,13 @@ parsesub: {
USTPUTC(c, out);
c = pgetc_eatbnl();
} else {
- badsub:
- raise_error_syntax("bad substitution");
+ goto badsub;
}
if (c != '}' && subtype == VSLENGTH) {
/* ${#VAR didn't end with } */
goto badsub;
}
- STPUTC('=', out);
flags = 0;
if (subtype == 0) {
static const char types[] ALIGN1 = "}-+?=";
@@ -11784,7 +11786,7 @@ parsesub: {
if (!strchr(types, c)) {
subtype = VSSUBSTR;
pungetc();
- break; /* "goto do_pungetc" is bigger (!) */
+ break; /* "goto badsub" is bigger (!) */
}
#endif
flags = VSNUL;
@@ -11792,7 +11794,7 @@ parsesub: {
default: {
const char *p = strchr(types, c);
if (p == NULL)
- goto badsub;
+ break;
subtype = p - types + VSNORMAL;
break;
}
@@ -11802,7 +11804,7 @@ parsesub: {
subtype = (c == '#' ? VSTRIMLEFT : VSTRIMRIGHT);
c = pgetc_eatbnl();
if (c != cc)
- goto do_pungetc;
+ goto badsub;
subtype++;
break;
}
@@ -11814,13 +11816,13 @@ parsesub: {
subtype = VSREPLACE;
c = pgetc_eatbnl();
if (c != '/')
- goto do_pungetc;
+ goto badsub;
subtype++; /* VSREPLACEALL */
break;
#endif
}
} else {
- do_pungetc:
+ badsub:
pungetc();
}
((unsigned char *)stackblock())[typeloc] = subtype | flags;
@@ -11830,6 +11832,7 @@ parsesub: {
dqvarnest++;
}
}
+ STPUTC('=', out);
}
goto parsesub_return;
}