busybox: updated 1.13.0 ash fix
This commit is contained in:
Peter Korsgaard
parent
50def0e495
commit
b277d41ccc
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@ -1,5 +1,5 @@
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--- busybox-1.13.0/shell/ash.c Thu Oct 30 08:41:32 2008
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+++ busybox-1.13.0-ash/shell/ash.c Sat Nov 22 02:31:06 2008
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+++ busybox-1.13.0-ash/shell/ash.c Fri Nov 28 04:39:17 2008
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@@ -536,6 +536,7 @@
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#define NHERE 24
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#define NXHERE 25
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@ -88,3 +88,188 @@
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};
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static void calcsize(union node *n);
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@@ -9065,8 +9069,6 @@
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* This implements the input routines used by the parser.
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*/
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-#define EOF_NLEFT -99 /* value of parsenleft when EOF pushed back */
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-
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enum {
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INPUT_PUSH_FILE = 1,
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INPUT_NOFILE_OK = 2,
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@@ -9107,7 +9109,6 @@
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#endif
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parsenextc = sp->prevstring;
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parsenleft = sp->prevnleft;
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-/*dprintf("*** calling popstring: restoring to '%s'\n", parsenextc);*/
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g_parsefile->strpush = sp->prev;
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if (sp != &(g_parsefile->basestrpush))
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free(sp);
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@@ -9123,7 +9124,7 @@
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#if ENABLE_FEATURE_EDITING
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retry:
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- if (!iflag || g_parsefile->fd)
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+ if (!iflag || g_parsefile->fd != STDIN_FILENO)
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nr = nonblock_safe_read(g_parsefile->fd, buf, BUFSIZ - 1);
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else {
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#if ENABLE_FEATURE_TAB_COMPLETION
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@@ -9171,55 +9172,76 @@
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* Refill the input buffer and return the next input character:
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*
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* 1) If a string was pushed back on the input, pop it;
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- * 2) If an EOF was pushed back (parsenleft == EOF_NLEFT) or we are reading
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+ * 2) If an EOF was pushed back (parsenleft < -BIGNUM) or we are reading
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* from a string so we can't refill the buffer, return EOF.
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* 3) If the is more stuff in this buffer, use it else call read to fill it.
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* 4) Process input up to the next newline, deleting nul characters.
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*/
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+//#define pgetc_debug(...) bb_error_msg(__VA_ARGS__)
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+#define pgetc_debug(...) ((void)0)
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static int
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preadbuffer(void)
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{
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char *q;
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int more;
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- char savec;
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while (g_parsefile->strpush) {
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#if ENABLE_ASH_ALIAS
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- if (parsenleft == -1 && g_parsefile->strpush->ap &&
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- parsenextc[-1] != ' ' && parsenextc[-1] != '\t') {
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+ if (parsenleft == -1 && g_parsefile->strpush->ap
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+ && parsenextc[-1] != ' ' && parsenextc[-1] != '\t'
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+ ) {
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+ pgetc_debug("preadbuffer PEOA");
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return PEOA;
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}
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#endif
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popstring();
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+ /* try "pgetc" now: */
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+ pgetc_debug("internal pgetc at %d:%p'%s'", parsenleft, parsenextc, parsenextc);
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if (--parsenleft >= 0)
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return signed_char2int(*parsenextc++);
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}
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- if (parsenleft == EOF_NLEFT || g_parsefile->buf == NULL)
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+ /* on both branches above parsenleft < 0.
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+ * "pgetc" needs refilling.
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+ */
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+
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+ /* -90 is -BIGNUM. Below we use -99 to mark "EOF on read",
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+ * pungetc() may decrement it a few times. -90 is enough.
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+ */
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+ if (parsenleft < -90 || g_parsefile->buf == NULL) {
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+ pgetc_debug("preadbuffer PEOF1");
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+ /* even in failure keep them in lock step,
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+ * for correct pungetc. */
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+ parsenextc++;
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return PEOF;
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- flush_stdout_stderr();
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+ }
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more = parselleft;
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if (more <= 0) {
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+ flush_stdout_stderr();
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again:
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more = preadfd();
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if (more <= 0) {
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- parselleft = parsenleft = EOF_NLEFT;
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+ parselleft = parsenleft = -99;
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+ pgetc_debug("preadbuffer PEOF2");
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+ parsenextc++;
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return PEOF;
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}
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}
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+ /* Find out where's the end of line.
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+ * Set parsenleft/parselleft acordingly.
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+ * NUL chars are deleted.
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+ */
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q = parsenextc;
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-
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- /* delete nul characters */
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for (;;) {
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- int c;
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+ char c;
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more--;
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- c = *q;
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- if (!c)
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+ c = *q;
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+ if (c == '\0') {
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memmove(q, q + 1, more);
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- else {
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+ } else {
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q++;
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if (c == '\n') {
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parsenleft = q - parsenextc - 1;
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@@ -9236,22 +9258,23 @@
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}
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parselleft = more;
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- savec = *q;
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- *q = '\0';
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-
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if (vflag) {
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+ char save = *q;
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+ *q = '\0';
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out2str(parsenextc);
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+ *q = save;
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}
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- *q = savec;
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-
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+ pgetc_debug("preadbuffer at %d:%p'%s'", parsenleft, parsenextc, parsenextc);
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return signed_char2int(*parsenextc++);
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}
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#define pgetc_as_macro() (--parsenleft >= 0 ? signed_char2int(*parsenextc++) : preadbuffer())
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+
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static int
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pgetc(void)
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{
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+ pgetc_debug("pgetc at %d:%p'%s'", parsenleft, parsenextc, parsenextc);
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return pgetc_as_macro();
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}
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@@ -9312,6 +9335,7 @@
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{
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parsenleft++;
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parsenextc--;
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+ pgetc_debug("pushed back to %d:%p'%s'", parsenleft, parsenextc, parsenextc);
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}
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/*
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@@ -9325,16 +9349,17 @@
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pushstring(char *s, struct alias *ap)
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{
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struct strpush *sp;
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- size_t len;
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+ int len;
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len = strlen(s);
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INT_OFF;
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if (g_parsefile->strpush) {
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- sp = ckzalloc(sizeof(struct strpush));
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+ sp = ckzalloc(sizeof(*sp));
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sp->prev = g_parsefile->strpush;
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- g_parsefile->strpush = sp;
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- } else
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- sp = g_parsefile->strpush = &(g_parsefile->basestrpush);
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+ } else {
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+ sp = &(g_parsefile->basestrpush);
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+ }
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+ g_parsefile->strpush = sp;
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sp->prevstring = parsenextc;
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sp->prevnleft = parsenleft;
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#if ENABLE_ASH_ALIAS
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@@ -9424,7 +9449,7 @@
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close_on_exec_on(fd);
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if (push) {
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pushfile();
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- g_parsefile->buf = 0;
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+ g_parsefile->buf = NULL;
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}
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g_parsefile->fd = fd;
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if (g_parsefile->buf == NULL)
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