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-rw-r--r--toys/pending/sh.c85
1 files changed, 52 insertions, 33 deletions
diff --git a/toys/pending/sh.c b/toys/pending/sh.c
index a6a8ba99..2b11693a 100644
--- a/toys/pending/sh.c
+++ b/toys/pending/sh.c
@@ -837,27 +837,34 @@ char *slashcopy(char *s, char c)
}
// wildcard expand data and add results to arg list
-static void wildcard_add(struct sh_arg *arg, char *data)
+static void wildcard_add(struct sh_arg *arg, char *data, struct sh_arg *deck,
+ struct arg_list **delete)
{
arg_add(arg, data);
}
+// Record active wildcard chars in output string
+static void collect_wildcards(char *new, long oo, struct sh_arg *deck,
+ struct sh_arg *ant)
+{
+ ;
+}
-#define NO_PATH (1<<0) // path expansion (wildcards)
-#define NO_SPLIT (1<<1) // word splitting
-#define NO_BRACE (1<<2) // {brace,expansion}
-#define NO_TILDE (1<<3) // ~username/path
-#define NO_QUOTE (1<<4) // quote removal
+#define NO_QUOTE (1<<0) // quote removal
+#define NO_PATH (1<<1) // path expansion (wildcards)
+#define NO_SPLIT (1<<2) // word splitting
+#define NO_BRACE (1<<3) // {brace,expansion}
+#define NO_TILDE (1<<4) // ~username/path
#define SEMI_IFS (1<<5) // Use ' ' instead of IFS to combine $*
// TODO: parameter/variable $(command) $((math)) split pathglob
// expand str appending to arg using above flag defines, add mallocs to delete
static int expand_arg_nobrace(struct sh_arg *arg, char *str, unsigned flags,
struct arg_list **delete)
{
- char cc, qq = 0, sep[6], *old = str, *new = str, *s, *ss, *ifs, *slice;
+ char cc, qq = flags&NO_QUOTE, sep[6], *old = str, *new = str, *s, *ss, *ifs,
+ *slice;
int ii = 0, oo = 0, xx, yy, dd, jj, kk, ll, mm;
- void (*cardish_add)(struct sh_arg *arg, char *data) =
- (flags&NO_PATH) ? arg_add : wildcard_add;
+ struct sh_arg deck = {0}, ant = {0};
if (BUGBUG) dprintf(255, "expand %s\n", str);
@@ -890,22 +897,27 @@ if (BUGBUG) dprintf(255, "expand %s\n", str);
for (; (cc = str[ii++]); old!=new && (new[oo] = 0)) {
struct sh_arg aa = {0};
+ if (!(flags&NO_PATH) && !(qq&1)) collect_wildcards(new, oo, &deck, &ant);
+
// skip literal chars
- if (!strchr("$'`\\\"", cc)) {
- if (old != new) new[oo++] = cc;
+ if (!strchr("'\"\\$`"+2*(flags&NO_QUOTE), cc)) {
+ if (old != new) new[oo] = cc;
+ oo++;
continue;
}
// allocate snapshot if we just started modifying
if (old == new) {
new = xstrdup(new);
- new[oo = ii-1] = 0;
+ new[oo] = 0;
}
ifs = slice = 0;
// handle escapes and quoting
- if (cc == '\\') new[oo++] = str[ii] ? str[ii++] : cc;
- else if (cc == '"') qq++;
+ if (cc == '\\') {
+ if (!(qq&1) || strchr("\"\\$`", str[ii]))
+ new[oo++] = str[ii] ? str[ii++] : cc;
+ } else if (cc == '"') qq++;
else if (cc == '\'') {
if (qq&1) new[oo++] = cc;
else {
@@ -1165,7 +1177,7 @@ barf:
// when no prefix, not splitting, no suffix: use existing memory
if (!oo && !*ss && !((mm==aa.c) ? str[ii] : (flags&NO_SPLIT))) {
- if (qq || ss!=ifs) cardish_add(arg, ifs);
+ if (qq || ss!=ifs) wildcard_add(arg, ifs, &deck, delete);
continue;
}
@@ -1182,7 +1194,7 @@ barf:
else {
if (qq || *new || *ss) {
push_arg(delete, new = xrealloc(new, strlen(new)+1));
- cardish_add(arg, new);
+ wildcard_add(arg, new, &deck, delete);
new = xstrdup(str+ii);
}
qq &= 1;
@@ -1208,9 +1220,12 @@ barf:
// Record result.
if (*new || qq) {
if (old != new) push_arg(delete, new);
- cardish_add(arg, new);
+ wildcard_add(arg, new, &deck, delete);
} else if (old != new) free(new);
+// TODO free deck
+// TODO free ant, use ant to trim deck in wildcard_add
+
return 0;
}
@@ -1356,7 +1371,8 @@ static char *expand_one_arg(char *new, unsigned flags, struct arg_list **del)
struct sh_arg arg = {0};
char *s = 0;
- if (!expand_arg(&arg, new, flags, del) && arg.c == 1) s = *arg.v;
+ if (!expand_arg(&arg, new, flags|NO_PATH|NO_SPLIT, del)) s = *arg.v;
+ free(arg.v);
return s;
}
@@ -1459,11 +1475,16 @@ static struct sh_process *expand_redir(struct sh_arg *arg, int skip, int *urd)
if (isdigit(*s) && ss-s>5) break;
// expand arguments for everything but << and <<-
- if (strncmp(ss, "<<", 2) && ss[2] != '<' &&
- !(sss = expand_one_arg(sss, NO_PATH, &pp->delete)))
- {
- s = 0;
- break; // arg splitting here is an error
+ if (strncmp(ss, "<<", 2) && ss[2] != '<') {
+ struct sh_arg tmp = {0};
+
+ if (!expand_arg(&tmp, sss, 0, &pp->delete) && tmp.c == 1) sss = *tmp.v;
+ else {
+ if (tmp.c > 1) error_msg("%s: ambiguous redirect", sss);
+ s = 0;
+ }
+ free(tmp.v);
+ if (!s) break;
}
// Parse the [fd] part of [fd]<name
@@ -1499,13 +1520,13 @@ static struct sh_process *expand_redir(struct sh_arg *arg, int skip, int *urd)
// write contents to file (if <<< else <<) then lseek back to start
else if (ss[2] == '<') {
- if (x && !(sss = expand_one_arg(sss, NO_PATH|NO_SPLIT, 0))) {
+ if (!(ss = expand_one_arg(sss, 0, 0))) {
s = 0;
break;
}
- len = strlen(sss);
- if (len != writeall(from, sss, len)) bad++;
- if (x) free(sss);
+ len = strlen(ss);
+ if (len != writeall(from, ss, len)) bad++;
+ if (ss != sss) free(ss);
} else {
struct sh_arg *hh = arg+here++;
@@ -1514,9 +1535,7 @@ static struct sh_process *expand_redir(struct sh_arg *arg, int skip, int *urd)
sss = 0;
// TODO audit this ala man page
// expand_parameter, commands, and arithmetic
- if (x && !(ss = sss = expand_one_arg(ss,
- NO_PATH|NO_SPLIT|NO_BRACE|NO_TILDE|NO_QUOTE, 0)))
- {
+ if (x && !(ss = sss = expand_one_arg(ss, ~SEMI_IFS, 0))) {
s = 0;
break;
}
@@ -1647,7 +1666,7 @@ if (BUGBUG) { int i; dprintf(255, "envlen=%d arg->c=%d run=", envlen, arg->c); f
// perform assignments locally if there's no command
if (envlen == arg->c) {
while (jj<envlen) {
- if (!(s = expand_one_arg(arg->v[jj], NO_PATH|NO_SPLIT, 0))) break;
+ if (!(s = expand_one_arg(arg->v[jj], SEMI_IFS, 0))) break;
setvar((s == arg->v[jj++]) ? xstrdup(s) : s);
}
if (jj == envlen) setvarval("_", "");
@@ -1658,7 +1677,7 @@ if (BUGBUG) { int i; dprintf(255, "envlen=%d arg->c=%d run=", envlen, arg->c); f
memcpy(env.v = xmalloc(sizeof(char *)*(env.c+33)), environ,
sizeof(char *)*(env.c+1));
for (; jj<envlen; jj++) {
- if (!(sss = expand_one_arg(arg->v[jj], NO_PATH|NO_SPLIT, &delete)))
+ if (!(sss = expand_one_arg(arg->v[jj], SEMI_IFS, &delete)))
break;
for (ll = 0; ll<env.c; ll++) {
for (s = sss, ss = env.v[ll]; *s == *ss && *s != '='; s++, ss++);
@@ -2321,7 +2340,7 @@ dprintf(2, "TODO skipped init for((;;)), need math parser\n");
if (expand_arg(&blk->farg, pl->next->arg->v[i], 0, &blk->fdelete))
break;
if (i != pl->next->arg->c) pl = pop_block(&blk, pipes);
- // in without LIST. (This expansion can't fail.)
+ // in without LIST. (This expansion can't return error.)
} else expand_arg(&blk->farg, "\"$@\"", 0, &blk->fdelete);
// TODO case/esac [[/]] ((/)) function/}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-17 07:14:14 +0000