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authorRob Landley <rob@landley.net>2021-04-27 06:51:05 -0500
committerRob Landley <rob@landley.net>2021-04-27 06:51:05 -0500
commitde04ee7f8dede68073518fc8ed3889051a527157 (patch)
tree1c8e871c02eae9151770786a0ab4579113609f0e /toys/pending
parenta28ad6de961169acf50d96427259f9eba6039b5d (diff)
downloadtoybox-de04ee7f8dede68073518fc8ed3889051a527157.tar.gz
Make toysh actually run a shell function.
Diffstat (limited to 'toys/pending')
-rw-r--r--toys/pending/sh.c84
1 files changed, 44 insertions, 40 deletions
diff --git a/toys/pending/sh.c b/toys/pending/sh.c
index fd72037a..70d7280c 100644
--- a/toys/pending/sh.c
+++ b/toys/pending/sh.c
@@ -2532,42 +2532,41 @@ static int parse_line(char *line, struct sh_pipeline **ppl,
arg[pl->count].c = 0;
if (s[2] == '<') pl->here++; // <<< doesn't load more data
}
- pl = 0;
- }
- if (done) break;
- s = 0;
- // Did we just end a function?
- if (ex == (void *)1) {
- struct sh_function *funky;
+ // Did we just end a function?
+ if (ex == (void *)1) {
+ struct sh_function *funky;
- // function must be followed by a compound statement for some reason
- if ((*ppl)->prev->type != 3) {
- s = *(*ppl)->prev->arg->v;
- goto flush;
- }
+ // function must be followed by a compound statement for some reason
+ if ((*ppl)->prev->type != 3) {
+ s = *(*ppl)->prev->arg->v;
+ goto flush;
+ }
- // Back up to saved function() statement and create sh_function
- free(dlist_lpop(expect));
- pl = (void *)(*expect)->data;
- funky = xmalloc(sizeof(struct sh_function));
- funky->refcount = 1;
- funky->name = *pl->arg->v;
- *pl->arg->v = (void *)funky;
-
- // Chop out pipeline segments added since saved function
- funky->pipeline = pl->next;
- pl->next->prev = (*ppl)->prev;
- (*ppl)->prev->next = pl->next;
- pl->next = *ppl;
- (*ppl)->prev = pl;
-
- // Immature function has matured (meaning cleanup is different)
- pl->type = 'F';
+ // Back up to saved function() statement and create sh_function
+ free(dlist_lpop(expect));
+ pl = (void *)(*expect)->data;
+ funky = xmalloc(sizeof(struct sh_function));
+ funky->refcount = 1;
+ funky->name = *pl->arg->v;
+ *pl->arg->v = (void *)funky;
+
+ // Chop out pipeline segments added since saved function
+ funky->pipeline = pl->next;
+ pl->next->prev = (*ppl)->prev;
+ (*ppl)->prev->next = pl->next;
+ pl->next = *ppl;
+ (*ppl)->prev = pl;
+
+ // Immature function has matured (meaning cleanup is different)
+ pl->type = 'F';
+ free(dlist_lpop(expect));
+ ex = *expect ? (*expect)->prev->data : 0;
+ }
pl = 0;
- free(dlist_lpop(expect));
- ex = *expect ? (*expect)->prev->data : 0;
}
+ if (done) break;
+ s = 0;
// skip leading whitespace/comment here to know where next word starts
while (isspace(*start)) ++start;
@@ -2575,7 +2574,7 @@ static int parse_line(char *line, struct sh_pipeline **ppl,
// Parse next word and detect overflow (too many nested quotes).
if ((end = parse_word(start, 0, 0)) == (void *)1) goto flush;
-//dprintf(2, "%d %p %s word=%.*s\n", getpid(), pl, ex, (int)(end-start), end ? start : "");
+//dprintf(2, "%d %p %s word=%.*s\n", getpid(), pl, (ex != (void *)1) ? ex : "function", (int)(end-start), end ? start : "");
if (pl && pl->type == 'f' && arg->c == 1 && (end-start!=1 || *start!='(')) {
funky:
@@ -2604,7 +2603,7 @@ funky:
// Ok, we have a word. What does it _mean_?
// case/esac parsing is weird (unbalanced parentheses!), handle first
- i = ex && !strcmp(ex, "esac") &&
+ i = (unsigned long)ex>1 && !strcmp(ex, "esac") &&
((pl->type && pl->type != 3) || (*start==';' && end-start>1));
if (i) {
@@ -2644,7 +2643,7 @@ funky:
}
// "for" on its own line is an error.
- if (arg->c == 1 && ex && !memcmp(ex, "do\0A", 4)) {
+ if (arg->c == 1 && (unsigned long)ex>1 && !memcmp(ex, "do\0A", 4)) {
s = "newline";
goto flush;
}
@@ -2735,7 +2734,7 @@ funky:
free(s);
s = 0;
// TODO can't have ; between "for i" and in or do. (Newline yes, ; no. Why?)
- if (!arg->c && ex && !memcmp(ex, "do\0C", 4)) continue;
+ if (!arg->c && (unsigned long)ex>1 && !memcmp(ex, "do\0C", 4)) continue;
// ;; and friends only allowed in case statements
} else if (*s == ';') goto flush;
@@ -2747,7 +2746,7 @@ funky:
continue;
// a for/select must have at least one additional argument on same line
- } else if (ex && !memcmp(ex, "do\0A", 4)) {
+ } else if ((unsigned long)ex>1 && !memcmp(ex, "do\0A", 4)) {
// Sanity check and break the segment
if (strncmp(s, "((", 2) && *varend(s)) goto flush;
@@ -2760,7 +2759,7 @@ funky:
} else if (arg->c>1) continue;
// Do we expect something that _must_ come next? (no multiple statements)
- if (ex) {
+ if ((unsigned long)ex>1) {
// The "test" part of for/select loops can have (at most) one "in" line,
// for {((;;))|name [in...]} do
if (!memcmp(ex, "do\0C", 4)) {
@@ -2805,7 +2804,7 @@ funky:
if (*expect && !(*expect)->prev->data) free(dlist_lpop(expect));
// if can't end a statement here skip next few tests
- } else if (!ex);
+ } else if ((unsigned long)ex<2);
// If we got here we expect a specific word to end this block: is this it?
else if (!strcmp(s, ex)) {
@@ -2887,7 +2886,12 @@ flush:
if (s) syntax_err(s);
llist_traverse(*ppl, free_pipeline);
*ppl = 0;
- llist_traverse(*expect, free);
+ while (*expect) {
+ struct double_list *del = dlist_pop(expect);
+
+ if (del->data != (void *)1) free(del->data);
+ free(del);
+ }
*expect = 0;
return 0-!!s;
@@ -3046,7 +3050,7 @@ static void run_lines(void)
ctl = TT.ff->pl->end->arg->v[TT.ff->pl->end->arg->c];
s = *TT.ff->pl->arg->v;
ss = TT.ff->pl->arg->v[1];
-//dprintf(2, "%d s=%s ss=%s ctl=%s type=%d\n", getpid(), s, ss, ctl, TT.ff->pl->type);
+//dprintf(2, "%d s=%s ss=%s ctl=%s type=%d\n", getpid(), (TT.ff->pl->type == 'F') ? ((struct sh_function *)s)->name : s, ss, ctl, TT.ff->pl->type);
if (!pplist) TT.hfd = 10;
// Skip disabled blocks, handle pipes and backgrounding