build-sys: Relocate library to library/

All the dependent programs needed to have their includes moved too

Signed-off-by: Craig Small <csmall@dropbear.xyz>

library/escape.c

@@ -0,0 +1,142 @@
+/*
+ * escape.c - printing handling
+ * Copyright 1998-2002 by Albert Cahalan
+ * Copyright 2020-2022 Jim Warner <james.warner@comcast.net>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+
+#include <limits.h>
+#include <stdio.h>
+#include <string.h>
+
+#include "escape.h"
+#include "readproc.h"
+#include "nls.h"
+
+#define SECURE_ESCAPE_ARGS(dst, bytes) do { \
+  if ((bytes) <= 0) return 0; \
+  *(dst) = '\0'; \
+  if ((bytes) >= INT_MAX) return 0; \
+} while (0)
+
+static const char UTF_tab[] = {
+    1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, // 0x00 - 0x0F
+    1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, // 0x10 - 0x1F
+    1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, // 0x20 - 0x2F
+    1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, // 0x30 - 0x3F
+    1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, // 0x40 - 0x4F
+    1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, // 0x50 - 0x5F
+    1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, // 0x60 - 0x6F
+    1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, // 0x70 - 0x7F
+   -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1, // 0x80 - 0x8F
+   -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1, // 0x90 - 0x9F
+   -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1, // 0xA0 - 0xAF
+   -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1, // 0xB0 - 0xBF
+   -1,-1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, // 0xC0 - 0xCF
+    2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, // 0xD0 - 0xDF
+    3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, // 0xE0 - 0xEF
+    4, 4, 4, 4, 4,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1, // 0xF0 - 0xFF
+};
+
+static const unsigned char ESC_tab[] = {
+   "@..............................." // 0x00 - 0x1F
+   "||||||||||||||||||||||||||||||||" // 0x20 - 0x3F
+   "||||||||||||||||||||||||||||||||" // 0x40 - 0x5f
+   "|||||||||||||||||||||||||||||||." // 0x60 - 0x7F
+   "????????????????????????????????" // 0x80 - 0x9F
+   "????????????????????????????????" // 0xA0 - 0xBF
+   "????????????????????????????????" // 0xC0 - 0xDF
+   "????????????????????????????????" // 0xE0 - 0xFF
+};
+
+static inline void esc_all (unsigned char *str) {
+   unsigned char c;
+
+   // if bad locale/corrupt str, replace non-printing stuff
+   while (*str) {
+      if ((c = ESC_tab[*str]) != '|')
+         *str = c;
+      ++str;
+   }
+}
+
+static inline void esc_ctl (unsigned char *str, int len) {
+   int i, n;
+
+   for (i = 0; i < len; ) {
+      // even with a proper locale, strings might be corrupt
+      if ((n = UTF_tab[*str]) < 0 || i + n > len) {
+         esc_all(str);
+         return;
+      }
+      // and eliminate those non-printing control characters
+      if (*str < 0x20 || *str == 0x7f)
+         *str = '?';
+      str += n;
+      i += n;
+   }
+}
+
+int escape_str (char *dst, const char *src, int bufsize) {
+   static __thread int utf_sw = 0;
+   int n;
+
+   if (utf_sw == 0) {
+      char *enc = nl_langinfo(CODESET);
+      utf_sw = enc && strcasecmp(enc, "UTF-8") == 0 ? 1 : -1;
+   }
+   SECURE_ESCAPE_ARGS(dst, bufsize);
+   n = snprintf(dst, bufsize, "%s", src);
+   if (n < 0) {
+      *dst = '\0';
+      return 0;
+   }
+   if (n >= bufsize) n = bufsize-1;
+   if (utf_sw < 0)
+      esc_all((unsigned char *)dst);
+   else
+      esc_ctl((unsigned char *)dst, n);
+   return n;
+}
+
+int escape_command (char *outbuf, const proc_t *pp, int bytes, unsigned flags) {
+   int overhead = 0;
+   int end = 0;
+
+   if (flags & ESC_BRACKETS)
+      overhead += 2;
+   if (flags & ESC_DEFUNCT) {
+      if (pp->state == 'Z') overhead += 10;    // chars in " <defunct>"
+      else flags &= ~ESC_DEFUNCT;
+   }
+   if (overhead + 1 >= bytes) {
+      // if no room for even one byte of the command name
+      outbuf[0] = '\0';
+      return 0;
+   }
+   if (flags & ESC_BRACKETS)
+      outbuf[end++] = '[';
+   end += escape_str(outbuf+end, pp->cmd, bytes-overhead);
+   // we want "[foo] <defunct>", not "[foo <defunct>]"
+   if (flags & ESC_BRACKETS)
+      outbuf[end++] = ']';
+   if (flags & ESC_DEFUNCT) {
+      memcpy(outbuf+end, " <defunct>", 10);
+      end += 10;
+   }
+   outbuf[end] = '\0';
+   return end;  // bytes, not including the NUL
+}