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authorRob Landley <rob@landley.net>2019-08-29 19:40:11 -0500
committerRob Landley <rob@landley.net>2019-08-29 19:40:11 -0500
commit3841cf8a685b4c95264dae7f42db65ca24dbf1b1 (patch)
tree556b5edf4d2b9526306ee81c8f2b7476da35096c /toys/pending
parentf97f4e72e9ead6dcd0f747d5c780c0878b873e7f (diff)
downloadtoybox-3841cf8a685b4c95264dae7f42db65ca24dbf1b1.tar.gz
Fix sh handling nested if/else/elif statements ala
if true; then if false; then echo one; elif echo two; then echo three; else echo four; fi; fi
Diffstat (limited to 'toys/pending')
-rw-r--r--toys/pending/sh.c28
1 files changed, 23 insertions, 5 deletions
diff --git a/toys/pending/sh.c b/toys/pending/sh.c
index d253277f..b7fe42dd 100644
--- a/toys/pending/sh.c
+++ b/toys/pending/sh.c
@@ -24,7 +24,7 @@
* TODO: make fake pty wrapper for test infrastructure
* TODO: // Handle embedded NUL bytes in the command line.
* TODO: var=val command
- * existing but considered builtins: false kill pwd true
+ * existing but considered builtins: false kill pwd true time
* buitins: alias bg command fc fg getopts jobs newgrp read umask unalias wait
* "special" builtins: break continue : . eval exec export readonly return set
* shift times trap unset
@@ -51,9 +51,11 @@ USE_SH(NEWTOY(exit, NULL, TOYFLAG_NOFORK))
USE_SH(NEWTOY(sh, "c:i", TOYFLAG_BIN))
USE_SH(OLDTOY(toysh, sh, TOYFLAG_BIN))
+USE_SH(OLDTOY(bash, sh, TOYFLAG_BIN))
// Login lies in argv[0], so add some aliases to catch that
USE_SH(OLDTOY(-sh, sh, 0))
USE_SH(OLDTOY(-toysh, sh, 0))
+USE_SH(OLDTOY(-bash, sh, 0))
config SH
bool "sh (toysh)"
@@ -129,6 +131,8 @@ void cd_main(void)
{
char *dest = *toys.optargs ? *toys.optargs : getenv("HOME");
+// TODO: -LPE@
+// TODO: cd .. goes up $PWD path we used to get here, not ./..
xchdir(dest ? dest : "/");
}
@@ -884,7 +888,7 @@ static int parse_line(char *line, struct sh_function *sp)
// can only have one "in" line between for/do, but not with for(())
if (!pl->prev->type) goto flush;
if (!strncmp(pl->prev->arg->v[1], "((", 2)) goto flush;
- else if (!strcmp(s, "in")) goto flush;
+ else if (strcmp(s, "in")) goto flush;
continue;
}
@@ -1013,6 +1017,14 @@ static void dump_state(struct sh_function *sp)
}
}
+/* Flow control statements:
+
+ if/then/elif/else/fi, for select while until/do/done, case/esac,
+ {/}, [[/]], (/), function assignment
+*/
+
+
+
// run a shell function, handling flow control statements
static void run_function(struct sh_function *sp)
{
@@ -1035,7 +1047,10 @@ static void run_function(struct sh_function *sp)
// Normal executable statement?
if (!pl->type) {
// TODO: break & is supported? Seriously? Also break > potato
+// TODO: break multiple aguments
if (!strcmp(s, "break") || !strcmp(s, "continue")) {
+
+ // How many layers to peel off?
i = ss ? atol(ss) : 0;
if (i<1) i = 1;
if (!blk || pl->arg->c>2 || ss[strspn(ss, "0123456789")]) {
@@ -1062,7 +1077,7 @@ static void run_function(struct sh_function *sp)
// returns last statement of pipeline
if (!blk) toys.exitval = run_pipeline(&pl, 0);
else if (blk->run) toys.exitval = run_pipeline(&pl, blk->redir);
- else do pl = pl->next; while (!pl->type);
+ else while (pl->next && !pl->next->type) pl = pl->next;
// Starting a new block?
} else if (pl->type == 1) {
@@ -1099,6 +1114,8 @@ function/}
// todo perform block end redirects to blk->redir
}
+ // no special handling needed
+
// What flow control statement is this?
if (!strcmp(s, "for") || !strcmp(s, "select")) {
if (!strncmp(blk->fvar = ss, "((", 2)) {
@@ -1120,8 +1137,9 @@ dprintf(2, "skipped init for((;;)), need math parser\n");
if (!strcmp(s, "then")) blk->run = blk->run && !toys.exitval;
else if (!strcmp(s, "else") || !strcmp(s, "elif")) blk->run = !blk->run;
else if (!strcmp(s, "do")) {
- if (!strcmp(*blk->start->arg->v, "while"))
- blk->run = blk->run && !toys.exitval;
+ ss = *blk->start->arg->v;
+ if (!strcmp(ss, "while")) blk->run = blk->run && !toys.exitval;
+ else if (!strcmp(ss, "until")) blk->run = blk->run && toys.exitval;
else if (blk->loop >= blk->farg.c) {
blk->run = 0;
pl = block_end(pl);