154 lines
3.5 KiB
C++
154 lines
3.5 KiB
C++
/* winf.cc
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Copyright 2003, 2004, 2005, 2006, 2008, 2009, 2013, 2014 Red Hat, Inc.
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This software is a copyrighted work licensed under the terms of the
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Cygwin license. Please consult the file "CYGWIN_LICENSE" for
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details. */
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#include "winsup.h"
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#include <stdlib.h>
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#include "cygerrno.h"
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#include "security.h"
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#include "path.h"
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#include "fhandler.h"
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#include "dtable.h"
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#include "cygheap.h"
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#include "tls_pbuf.h"
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#include "winf.h"
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#include "sys/cygwin.h"
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void
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linebuf::finish (bool cmdlenoverflow_ok)
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{
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if (!ix)
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add ("", 1);
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else
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{
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if (ix-- > MAXCYGWINCMDLEN && cmdlenoverflow_ok)
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ix = MAXCYGWINCMDLEN - 1;
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buf[ix] = '\0';
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}
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}
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void
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linebuf::add (const char *what, int len)
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{
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size_t newix = ix + len;
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if (newix >= alloced || !buf)
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{
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alloced += LINE_BUF_CHUNK + newix;
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buf = (char *) realloc (buf, alloced + 1);
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}
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memcpy (buf + ix, what, len);
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ix = newix;
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buf[ix] = '\0';
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}
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void
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linebuf::prepend (const char *what, int len)
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{
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int buflen;
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size_t newix;
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if ((newix = ix + len) >= alloced)
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{
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alloced += LINE_BUF_CHUNK + newix;
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buf = (char *) realloc (buf, alloced + 1);
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buf[ix] = '\0';
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}
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if ((buflen = strlen (buf)))
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memmove (buf + len, buf, buflen + 1);
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else
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buf[newix] = '\0';
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memcpy (buf, what, len);
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ix = newix;
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}
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bool
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linebuf::fromargv (av& newargv, const char *real_path, bool cmdlenoverflow_ok)
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{
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bool success = true;
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for (int i = 0; i < newargv.argc; i++)
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{
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char *p = NULL;
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const char *a;
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a = i ? newargv[i] : (char *) real_path;
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int len = strlen (a);
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if (len != 0 && !strpbrk (a, " \t\n\r\""))
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add (a, len);
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else
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{
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add ("\"", 1);
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/* Handle embedded special characters " and \.
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A " is always preceded by a \.
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A \ is not special unless it precedes a ". If it does,
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then all preceding \'s must be doubled to avoid having
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the Windows command line parser interpret the \ as quoting
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the ". This rule applies to a string of \'s before the end
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of the string, since cygwin/windows uses a " to delimit the
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argument. */
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for (; (p = strpbrk (a, "\"\\")); a = ++p)
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{
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add (a, p - a);
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/* Find length of string of backslashes */
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int n = strspn (p, "\\");
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if (!n)
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add ("\\\"", 2); /* No backslashes, so it must be a ".
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The " has to be protected with a backslash. */
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else
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{
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add (p, n); /* Add the run of backslashes */
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/* Need to double up all of the preceding
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backslashes if they precede a quote or EOS. */
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if (!p[n] || p[n] == '"')
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add (p, n);
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p += n - 1; /* Point to last backslash */
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}
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}
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if (*a)
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add (a);
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add ("\"", 1);
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}
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add (" ", 1);
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}
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finish (cmdlenoverflow_ok);
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if (ix >= MAXWINCMDLEN)
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{
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debug_printf ("command line too long (>32K), return E2BIG");
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set_errno (E2BIG);
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success = false;
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}
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return success;
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}
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int
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av::unshift (const char *what, int conv)
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{
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char **av;
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av = (char **) crealloc (argv, (argc + 2) * sizeof (char *));
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if (!av)
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return 0;
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argv = av;
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memmove (argv + 1, argv, (argc + 1) * sizeof (char *));
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tmp_pathbuf tp;
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char *buf = tp.c_get ();
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if (conv)
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{
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cygwin_conv_path (CCP_WIN_A_TO_POSIX | CCP_RELATIVE, what, buf,
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NT_MAX_PATH);
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char *p = strchr (buf, '\0') - 4;
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if (p > buf && ascii_strcasematch (p, ".exe"))
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*p = '\0';
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what = buf;
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}
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*argv = cstrdup1 (what);
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calloced++;
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argc++;
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return 1;
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}
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