summaryrefslogtreecommitdiffstats
path: root/grub-core/normal/cmdline.c
diff options
context:
space:
mode:
Diffstat (limited to 'grub-core/normal/cmdline.c')
-rw-r--r--grub-core/normal/cmdline.c691
1 files changed, 691 insertions, 0 deletions
diff --git a/grub-core/normal/cmdline.c b/grub-core/normal/cmdline.c
new file mode 100644
index 0000000..de03fe6
--- /dev/null
+++ b/grub-core/normal/cmdline.c
@@ -0,0 +1,691 @@
+/*
+ * GRUB -- GRand Unified Bootloader
+ * Copyright (C) 1999,2000,2001,2002,2003,2004,2005,2007,2009 Free Software Foundation, Inc.
+ *
+ * GRUB is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * GRUB is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with GRUB. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <grub/normal.h>
+#include <grub/misc.h>
+#include <grub/term.h>
+#include <grub/err.h>
+#include <grub/types.h>
+#include <grub/mm.h>
+#include <grub/partition.h>
+#include <grub/disk.h>
+#include <grub/file.h>
+#include <grub/env.h>
+#include <grub/i18n.h>
+#include <grub/charset.h>
+#include <grub/safemath.h>
+
+static grub_uint32_t *kill_buf;
+
+static int hist_size;
+static grub_uint32_t **hist_lines = 0;
+static int hist_pos = 0;
+static int hist_end = 0;
+static int hist_used = 0;
+
+grub_err_t
+grub_set_history (int newsize)
+{
+ grub_uint32_t **old_hist_lines = hist_lines;
+ hist_lines = grub_calloc (newsize, sizeof (grub_uint32_t *));
+
+ /* Copy the old lines into the new buffer. */
+ if (old_hist_lines)
+ {
+ /* Remove the lines that don't fit in the new buffer. */
+ if (newsize < hist_used)
+ {
+ grub_size_t i;
+ grub_size_t delsize = hist_used - newsize;
+ hist_used = newsize;
+
+ for (i = 1; i < delsize + 1; i++)
+ {
+ grub_ssize_t pos = hist_end - i;
+ if (pos < 0)
+ pos += hist_size;
+ grub_free (old_hist_lines[pos]);
+ }
+
+ hist_end -= delsize;
+ if (hist_end < 0)
+ hist_end += hist_size;
+ }
+
+ if (hist_pos < hist_end)
+ grub_memmove (hist_lines, old_hist_lines + hist_pos,
+ (hist_end - hist_pos) * sizeof (grub_uint32_t *));
+ else if (hist_used)
+ {
+ /* Copy the older part. */
+ grub_memmove (hist_lines, old_hist_lines + hist_pos,
+ (hist_size - hist_pos) * sizeof (grub_uint32_t *));
+
+ /* Copy the newer part. */
+ grub_memmove (hist_lines + hist_size - hist_pos, old_hist_lines,
+ hist_end * sizeof (grub_uint32_t *));
+ }
+ }
+
+ grub_free (old_hist_lines);
+
+ hist_size = newsize;
+ hist_pos = 0;
+ hist_end = hist_used;
+ return 0;
+}
+
+/* Get the entry POS from the history where `0' is the newest
+ entry. */
+static grub_uint32_t *
+grub_history_get (unsigned pos)
+{
+ pos = (hist_pos + pos) % hist_size;
+ return hist_lines[pos];
+}
+
+static grub_size_t
+strlen_ucs4 (const grub_uint32_t *s)
+{
+ const grub_uint32_t *p = s;
+
+ while (*p)
+ p++;
+
+ return p - s;
+}
+
+/* Replace the history entry on position POS with the string S. */
+static void
+grub_history_set (int pos, grub_uint32_t *s, grub_size_t len)
+{
+ grub_free (hist_lines[pos]);
+ hist_lines[pos] = grub_calloc (len + 1, sizeof (grub_uint32_t));
+ if (!hist_lines[pos])
+ {
+ grub_print_error ();
+ grub_errno = GRUB_ERR_NONE;
+ return ;
+ }
+ grub_memcpy (hist_lines[pos], s, len * sizeof (grub_uint32_t));
+ hist_lines[pos][len] = 0;
+}
+
+/* Insert a new history line S on the top of the history. */
+static void
+grub_history_add (grub_uint32_t *s, grub_size_t len)
+{
+ /* Remove the oldest entry in the history to make room for a new
+ entry. */
+ if (hist_used + 1 > hist_size)
+ {
+ hist_end--;
+ if (hist_end < 0)
+ hist_end = hist_size + hist_end;
+
+ grub_free (hist_lines[hist_end]);
+ }
+ else
+ hist_used++;
+
+ /* Move to the next position. */
+ hist_pos--;
+ if (hist_pos < 0)
+ hist_pos = hist_size + hist_pos;
+
+ /* Insert into history. */
+ hist_lines[hist_pos] = NULL;
+ grub_history_set (hist_pos, s, len);
+}
+
+/* Replace the history entry on position POS with the string S. */
+static void
+grub_history_replace (unsigned pos, grub_uint32_t *s, grub_size_t len)
+{
+ grub_history_set ((hist_pos + pos) % hist_size, s, len);
+}
+
+/* A completion hook to print items. */
+static void
+print_completion (const char *item, grub_completion_type_t type, int count)
+{
+ if (count == 0)
+ {
+ /* If this is the first time, print a label. */
+
+ grub_puts ("");
+ switch (type)
+ {
+ case GRUB_COMPLETION_TYPE_COMMAND:
+ grub_puts_ (N_("Possible commands are:"));
+ break;
+ case GRUB_COMPLETION_TYPE_DEVICE:
+ grub_puts_ (N_("Possible devices are:"));
+ break;
+ case GRUB_COMPLETION_TYPE_FILE:
+ grub_puts_ (N_("Possible files are:"));
+ break;
+ case GRUB_COMPLETION_TYPE_PARTITION:
+ grub_puts_ (N_("Possible partitions are:"));
+ break;
+ case GRUB_COMPLETION_TYPE_ARGUMENT:
+ grub_puts_ (N_("Possible arguments are:"));
+ break;
+ default:
+ /* TRANSLATORS: this message is used if none of above matches.
+ This shouldn't happen but please use the general term for
+ "thing" or "object". */
+ grub_puts_ (N_("Possible things are:"));
+ break;
+ }
+ grub_puts ("");
+ }
+
+ if (type == GRUB_COMPLETION_TYPE_PARTITION)
+ {
+ grub_normal_print_device_info (item);
+ grub_errno = GRUB_ERR_NONE;
+ }
+ else
+ grub_printf (" %s", item);
+}
+
+struct cmdline_term
+{
+ struct grub_term_coordinate pos;
+ unsigned ystart, width, height;
+ unsigned prompt_len;
+ struct grub_term_output *term;
+};
+
+static inline void
+cl_set_pos (struct cmdline_term *cl_term, grub_size_t lpos)
+{
+ cl_term->pos.x = (cl_term->prompt_len + lpos) % cl_term->width;
+ cl_term->pos.y = cl_term->ystart
+ + (cl_term->prompt_len + lpos) / cl_term->width;
+ grub_term_gotoxy (cl_term->term, cl_term->pos);
+}
+
+static void
+cl_set_pos_all (struct cmdline_term *cl_terms, unsigned nterms,
+ grub_size_t lpos)
+{
+ unsigned i;
+ for (i = 0; i < nterms; i++)
+ cl_set_pos (&cl_terms[i], lpos);
+}
+
+static inline void __attribute__ ((always_inline))
+cl_print (struct cmdline_term *cl_term, grub_uint32_t c,
+ grub_uint32_t *start, grub_uint32_t *end)
+{
+ grub_uint32_t *p;
+
+ for (p = start; p < end; p++)
+ {
+ if (c)
+ grub_putcode (c, cl_term->term);
+ else
+ grub_putcode (*p, cl_term->term);
+ cl_term->pos.x++;
+ if (cl_term->pos.x >= cl_term->width - 1)
+ {
+ cl_term->pos.x = 0;
+ if (cl_term->pos.y >= (unsigned) (cl_term->height - 1))
+ cl_term->ystart--;
+ else
+ cl_term->pos.y++;
+ grub_putcode ('\n', cl_term->term);
+ }
+ }
+}
+
+static void
+cl_print_all (struct cmdline_term *cl_terms, unsigned nterms,
+ grub_uint32_t c, grub_uint32_t *start, grub_uint32_t *end)
+{
+ unsigned i;
+ for (i = 0; i < nterms; i++)
+ cl_print (&cl_terms[i], c, start, end);
+}
+
+static void
+init_clterm (struct cmdline_term *cl_term_cur)
+{
+ cl_term_cur->pos.x = cl_term_cur->prompt_len;
+ cl_term_cur->pos.y = grub_term_getxy (cl_term_cur->term).y;
+ cl_term_cur->ystart = cl_term_cur->pos.y;
+ cl_term_cur->width = grub_term_width (cl_term_cur->term);
+ cl_term_cur->height = grub_term_height (cl_term_cur->term);
+}
+
+
+static void
+cl_delete (struct cmdline_term *cl_terms, unsigned nterms,
+ grub_uint32_t *buf,
+ grub_size_t lpos, grub_size_t *llen, unsigned len)
+{
+ if (lpos + len <= (*llen))
+ {
+ cl_set_pos_all (cl_terms, nterms, (*llen) - len);
+ cl_print_all (cl_terms, nterms, ' ', buf + (*llen) - len, buf + (*llen));
+
+ cl_set_pos_all (cl_terms, nterms, lpos);
+
+ grub_memmove (buf + lpos, buf + lpos + len,
+ sizeof (grub_uint32_t) * ((*llen) - lpos + 1));
+ (*llen) -= len;
+ cl_print_all (cl_terms, nterms, 0, buf + lpos, buf + (*llen));
+ cl_set_pos_all (cl_terms, nterms, lpos);
+ }
+}
+
+
+static void
+cl_insert (struct cmdline_term *cl_terms, unsigned nterms,
+ grub_size_t *lpos, grub_size_t *llen,
+ grub_size_t *max_len, grub_uint32_t **buf,
+ const grub_uint32_t *str)
+{
+ grub_size_t len = strlen_ucs4 (str);
+
+ if (len + (*llen) >= (*max_len))
+ {
+ grub_uint32_t *nbuf;
+ grub_size_t sz;
+
+ if (grub_mul (*max_len, 2, max_len) ||
+ grub_mul (*max_len, sizeof (grub_uint32_t), &sz))
+ {
+ grub_errno = GRUB_ERR_OUT_OF_RANGE;
+ goto fail;
+ }
+
+ nbuf = grub_realloc ((*buf), sz);
+ if (nbuf)
+ (*buf) = nbuf;
+ else
+ {
+ fail:
+ grub_print_error ();
+ grub_errno = GRUB_ERR_NONE;
+ (*max_len) /= 2;
+ }
+ }
+
+ if (len + (*llen) < (*max_len))
+ {
+ grub_memmove ((*buf) + (*lpos) + len, (*buf) + (*lpos),
+ ((*llen) - (*lpos) + 1) * sizeof (grub_uint32_t));
+ grub_memmove ((*buf) + (*lpos), str, len * sizeof (grub_uint32_t));
+
+ (*llen) += len;
+ cl_set_pos_all (cl_terms, nterms, (*lpos));
+ cl_print_all (cl_terms, nterms, 0, *buf + (*lpos), *buf + (*llen));
+ (*lpos) += len;
+ cl_set_pos_all (cl_terms, nterms, (*lpos));
+ }
+}
+
+
+/* Get a command-line. If ESC is pushed, return zero,
+ otherwise return command line. */
+/* FIXME: The dumb interface is not supported yet. */
+char *
+grub_cmdline_get (const char *prompt_translated)
+{
+ grub_size_t lpos, llen;
+ grub_uint32_t *buf;
+ grub_size_t max_len = 256;
+ int key;
+ int histpos = 0;
+ struct cmdline_term *cl_terms;
+ char *ret;
+ unsigned nterms;
+
+ buf = grub_calloc (max_len, sizeof (grub_uint32_t));
+ if (!buf)
+ return 0;
+
+ lpos = llen = 0;
+ buf[0] = '\0';
+
+ {
+ grub_term_output_t term;
+
+ FOR_ACTIVE_TERM_OUTPUTS(term)
+ if ((grub_term_getxy (term).x) != 0)
+ grub_putcode ('\n', term);
+ }
+ grub_xputs (prompt_translated);
+ grub_xputs (" ");
+ grub_normal_reset_more ();
+
+ {
+ struct cmdline_term *cl_term_cur;
+ struct grub_term_output *cur;
+ grub_uint32_t *unicode_msg;
+ grub_size_t msg_len = grub_strlen (prompt_translated) + 3;
+
+ nterms = 0;
+ FOR_ACTIVE_TERM_OUTPUTS(cur)
+ nterms++;
+
+ cl_terms = grub_calloc (nterms, sizeof (cl_terms[0]));
+ if (!cl_terms)
+ {
+ grub_free (buf);
+ return 0;
+ }
+ cl_term_cur = cl_terms;
+
+ unicode_msg = grub_calloc (msg_len, sizeof (grub_uint32_t));
+ if (!unicode_msg)
+ {
+ grub_free (buf);
+ grub_free (cl_terms);
+ return 0;
+ }
+ msg_len = grub_utf8_to_ucs4 (unicode_msg, msg_len - 1,
+ (grub_uint8_t *) prompt_translated, -1, 0);
+ unicode_msg[msg_len++] = ' ';
+
+ FOR_ACTIVE_TERM_OUTPUTS(cur)
+ {
+ cl_term_cur->term = cur;
+ cl_term_cur->prompt_len = grub_getstringwidth (unicode_msg,
+ unicode_msg + msg_len,
+ cur);
+ init_clterm (cl_term_cur);
+ cl_term_cur++;
+ }
+ grub_free (unicode_msg);
+ }
+
+ if (hist_used == 0)
+ grub_history_add (buf, llen);
+
+ grub_refresh ();
+
+ while ((key = grub_getkey ()) != '\n' && key != '\r')
+ {
+ switch (key)
+ {
+ case GRUB_TERM_CTRL | 'a':
+ case GRUB_TERM_KEY_HOME:
+ lpos = 0;
+ cl_set_pos_all (cl_terms, nterms, lpos);
+ break;
+
+ case GRUB_TERM_CTRL | 'b':
+ case GRUB_TERM_KEY_LEFT:
+ if (lpos > 0)
+ {
+ lpos--;
+ cl_set_pos_all (cl_terms, nterms, lpos);
+ }
+ break;
+
+ case GRUB_TERM_CTRL | 'e':
+ case GRUB_TERM_KEY_END:
+ lpos = llen;
+ cl_set_pos_all (cl_terms, nterms, lpos);
+ break;
+
+ case GRUB_TERM_CTRL | 'f':
+ case GRUB_TERM_KEY_RIGHT:
+ if (lpos < llen)
+ {
+ lpos++;
+ cl_set_pos_all (cl_terms, nterms, lpos);
+ }
+ break;
+
+ case GRUB_TERM_CTRL | 'i':
+ case '\t':
+ {
+ int restore;
+ char *insertu8;
+ char *bufu8;
+ grub_uint32_t c;
+
+ c = buf[lpos];
+ buf[lpos] = '\0';
+
+ bufu8 = grub_ucs4_to_utf8_alloc (buf, lpos);
+ buf[lpos] = c;
+ if (!bufu8)
+ {
+ grub_print_error ();
+ grub_errno = GRUB_ERR_NONE;
+ break;
+ }
+
+ insertu8 = grub_normal_do_completion (bufu8, &restore,
+ print_completion);
+ grub_free (bufu8);
+
+ grub_normal_reset_more ();
+
+ if (restore)
+ {
+ unsigned i;
+
+ /* Restore the prompt. */
+ grub_xputs ("\n");
+ grub_xputs (prompt_translated);
+ grub_xputs (" ");
+
+ for (i = 0; i < nterms; i++)
+ init_clterm (&cl_terms[i]);
+
+ cl_print_all (cl_terms, nterms, 0, buf, buf + llen);
+ }
+
+ if (insertu8)
+ {
+ grub_size_t insertlen;
+ grub_ssize_t t;
+ grub_uint32_t *insert;
+
+ insertlen = grub_strlen (insertu8);
+ insert = grub_calloc (insertlen + 1, sizeof (grub_uint32_t));
+ if (!insert)
+ {
+ grub_free (insertu8);
+ grub_print_error ();
+ grub_errno = GRUB_ERR_NONE;
+ break;
+ }
+ t = grub_utf8_to_ucs4 (insert, insertlen,
+ (grub_uint8_t *) insertu8,
+ insertlen, 0);
+ if (t > 0)
+ {
+ if (insert[t-1] == ' ' && buf[lpos] == ' ')
+ {
+ insert[t-1] = 0;
+ if (t != 1)
+ cl_insert (cl_terms, nterms, &lpos, &llen, &max_len, &buf, insert);
+ lpos++;
+ }
+ else
+ {
+ insert[t] = 0;
+ cl_insert (cl_terms, nterms, &lpos, &llen, &max_len, &buf, insert);
+ }
+ }
+
+ grub_free (insertu8);
+ grub_free (insert);
+ }
+ cl_set_pos_all (cl_terms, nterms, lpos);
+ }
+ break;
+
+ case GRUB_TERM_CTRL | 'k':
+ if (lpos < llen)
+ {
+ grub_free (kill_buf);
+
+ kill_buf = grub_malloc ((llen - lpos + 1)
+ * sizeof (grub_uint32_t));
+ if (grub_errno)
+ {
+ grub_print_error ();
+ grub_errno = GRUB_ERR_NONE;
+ }
+ else
+ {
+ grub_memcpy (kill_buf, buf + lpos,
+ (llen - lpos + 1) * sizeof (grub_uint32_t));
+ kill_buf[llen - lpos] = 0;
+ }
+
+ cl_delete (cl_terms, nterms,
+ buf, lpos, &llen, llen - lpos);
+ }
+ break;
+
+ case GRUB_TERM_CTRL | 'n':
+ case GRUB_TERM_KEY_DOWN:
+ {
+ grub_uint32_t *hist;
+
+ lpos = 0;
+
+ if (histpos > 0)
+ {
+ grub_history_replace (histpos, buf, llen);
+ histpos--;
+ }
+
+ cl_delete (cl_terms, nterms,
+ buf, lpos, &llen, llen);
+ hist = grub_history_get (histpos);
+ cl_insert (cl_terms, nterms, &lpos, &llen, &max_len, &buf, hist);
+
+ break;
+ }
+
+ case GRUB_TERM_KEY_UP:
+ case GRUB_TERM_CTRL | 'p':
+ {
+ grub_uint32_t *hist;
+
+ lpos = 0;
+
+ if (histpos < hist_used - 1)
+ {
+ grub_history_replace (histpos, buf, llen);
+ histpos++;
+ }
+
+ cl_delete (cl_terms, nterms,
+ buf, lpos, &llen, llen);
+ hist = grub_history_get (histpos);
+
+ cl_insert (cl_terms, nterms, &lpos, &llen, &max_len, &buf, hist);
+ }
+ break;
+
+ case GRUB_TERM_CTRL | 'u':
+ if (lpos > 0)
+ {
+ grub_size_t n = lpos;
+
+ grub_free (kill_buf);
+
+ kill_buf = grub_calloc (n + 1, sizeof (grub_uint32_t));
+ if (grub_errno)
+ {
+ grub_print_error ();
+ grub_errno = GRUB_ERR_NONE;
+ }
+ if (kill_buf)
+ {
+ grub_memcpy (kill_buf, buf, n * sizeof(grub_uint32_t));
+ kill_buf[n] = 0;
+ }
+
+ lpos = 0;
+ cl_set_pos_all (cl_terms, nterms, lpos);
+ cl_delete (cl_terms, nterms,
+ buf, lpos, &llen, n);
+ }
+ break;
+
+ case GRUB_TERM_CTRL | 'y':
+ if (kill_buf)
+ cl_insert (cl_terms, nterms, &lpos, &llen, &max_len, &buf, kill_buf);
+ break;
+
+ case GRUB_TERM_ESC:
+ grub_free (cl_terms);
+ grub_free (buf);
+ return 0;
+
+ case GRUB_TERM_BACKSPACE:
+ if (lpos > 0)
+ {
+ lpos--;
+ cl_set_pos_all (cl_terms, nterms, lpos);
+ }
+ else
+ break;
+ /* fall through */
+
+ case GRUB_TERM_CTRL | 'd':
+ case GRUB_TERM_KEY_DC:
+ if (lpos < llen)
+ cl_delete (cl_terms, nterms,
+ buf, lpos, &llen, 1);
+ break;
+
+ default:
+ if (grub_isprint (key))
+ {
+ grub_uint32_t str[2];
+
+ str[0] = key;
+ str[1] = '\0';
+ cl_insert (cl_terms, nterms, &lpos, &llen, &max_len, &buf, str);
+ }
+ break;
+ }
+
+ grub_refresh ();
+ }
+
+ grub_xputs ("\n");
+ grub_refresh ();
+
+ histpos = 0;
+ if (strlen_ucs4 (buf) > 0)
+ {
+ grub_uint32_t empty[] = { 0 };
+ grub_history_replace (histpos, buf, llen);
+ grub_history_add (empty, 0);
+ }
+
+ ret = grub_ucs4_to_utf8_alloc (buf, llen + 1);
+ grub_free (buf);
+ grub_free (cl_terms);
+ return ret;
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-13 20:34:27 +0000