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Fix CreateProcessA to implement correct actions on ambiguous command 

line names (try longer and longer strings).
This commit is contained in:
Guy Albertelli 1999-05-02 10:17:31 +00:00 committed by Alexandre Julliard
parent 3a24f3f91e
commit 4f6d7f38dc
1 changed files with 135 additions and 26 deletions
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163
loader/module.c
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@ -872,37 +872,148 @@ HINSTANCE WINAPI LoadModule( LPCSTR name, LPVOID paramBlock )
return hInstance;
}
/*************************************************************************
* get_executable_name
*
* Try longer and longer strings from "line" to find an existing
* file name. Each attempt is delimited by a blank outside of quotes.
* Also will attempt to append ".exe" if requested and not already
* present. Returns the address of the remaining portion of the
* input line.
*
*/
static void get_executable_name( LPCSTR line, LPSTR name, int namelen,
LPCSTR *after, BOOL extension )
{
int len = 0;
LPCSTR p = NULL, pcmd = NULL;
LPCSTR pcmd = NULL;
LPCSTR from;
LPSTR to, to_end, to_old;
while ( *line == ' ' ) line++;
if ( *line == '"' )
{
line++; /* skip '"' */
if ((pcmd = strchr(line, '"'))) /* closing '"' available, too ? */
len = ++pcmd - line;
}
else
{
if((p = strchr(line, ' ')))
{
len = p - line;
pcmd = p+1;
}
else
len = strlen(line);
to = name;
to_end = to + namelen - 1;
to_old = to;
len++;
while ( *line == ' ' ) line++; /* point to beginning of string */
from = line;
pcmd = from;
do {
/* Copy all input till end, blank, or quote */
while((*from != 0) && (*from != ' ') && (*from != '"') && (to < to_end))
*to++ = *from++;
if (to >= to_end) { *to = 0; pcmd = from; break; }
if (*from == '"')
{
/* Handle quoted string. If there is a closing quote, copy all */
/* that is inside. */
from++;
if (!strchr(from, '"'))
{
/* fail - no closing quote */
to = to_old; /* restore to previous attempt */
*to = 0; /* end string */
break; /* exit with previous attempt */
}
if(len > (namelen - 4)) len = namelen - 4;
lstrcpynA(name, line, len);
while((*from != '"') && (to < to_end)) *to++ = *from++;
if (to >= to_end) { *to = 0; pcmd = from; break; }
from++;
continue; /* past quoted string, so restart from top */
}
*to = 0; /* terminate output string */
to_old = to; /* save for possible use in unmatched quote case */
pcmd = from;
/* Input termination is a blank. Try this file name */
/* Append ".exe" if necessary and space permits */
if ( (to-name) < namelen-4)
{
if(extension && (strrchr(name, '.') <= strrchr(name, '\\')) )
strcat(name, ".exe");
}
TRACE(module, "checking if file exists '%s'\n", name);
if (GetFileAttributesA(name)!=-1)
break; /* if file exists then all done */
/* loop around keeping the blank as part of file name */
if (!*from)
break; /* exit if out of input string */
*to++ = *from++; /* move in blank and restart */
} while (1);
if (after) *after = pcmd;
TRACE(module, "selected as file name '%s'\n and cmdline as %s\n",
name, debugstr_a(pcmd));
}
/*************************************************************************
* make_executable_name
*
* Scan input string (the lpApplicationName) and remove any quotes
* if they are balanced. Also will attempt to append ".exe" if requested
* and not already present.
*
*/
static void make_executable_name( LPCSTR line, LPSTR name, int namelen,
BOOL extension )
{
LPCSTR from;
LPSTR to, to_end, to_old;
to = name;
to_end = to + namelen - 1;
to_old = to;
while ( *line == ' ' ) line++; /* point to beginning of string */
from = line;
do {
/* Copy all input till end, blank, or quote */
while((*from != 0) && (*from != '"') && (to < to_end))
*to++ = *from++;
if (to >= to_end) { *to = 0; break; }
if (*from == '"')
{
/* Handle quoted string. If there is a closing quote, copy all */
/* that is inside. */
from++;
if (!strchr(from, '"'))
{
/* fail - no closing quote */
to = to_old; /* restore to previous attempt */
*to = 0; /* end string */
break; /* exit with previous attempt */
}
while((*from != '"') && (to < to_end)) *to++ = *from++;
if (to >= to_end) { *to = 0; break; }
from++;
continue; /* past quoted string, so restart from top */
}
*to = 0; /* terminate output string */
to_old = to; /* save for possible use in unmatched quote case */
/* loop around keeping the blank as part of file name */
if (!*from)
break; /* exit if out of input string */
*to++ = *from++; /* move in blank and restart */
} while (1);
/* Append ".exe" if necessary and space permits */
if ( (to-name) < namelen-4)
{
if(extension && (strrchr(name, '.') <= strrchr(name, '\\')) )
strcat(name, ".exe");
}
TRACE(module, "selected as file name '%s'\n", name );
}
/**********************************************************************
@ -921,7 +1032,7 @@ BOOL WINAPI CreateProcessA( LPCSTR lpApplicationName, LPSTR lpCommandLine,
OFSTRUCT ofs;
DWORD type;
char name[256];
LPCSTR cmdline;
LPCSTR cmdline = NULL;
/* Get name and command line */
@ -934,14 +1045,12 @@ BOOL WINAPI CreateProcessA( LPCSTR lpApplicationName, LPSTR lpCommandLine,
name[0] = '\0';
if (lpApplicationName) {
get_executable_name( lpApplicationName, name, sizeof(name), NULL, TRUE );
make_executable_name( lpApplicationName, name, sizeof(name), TRUE );
cmdline = (lpCommandLine) ? lpCommandLine : lpApplicationName ;
}
else {
get_executable_name( lpCommandLine, name, sizeof ( name ), NULL, TRUE );
get_executable_name( lpCommandLine, name, sizeof ( name ), &cmdline, TRUE );
}
if (!lpCommandLine)
cmdline = lpApplicationName;
else cmdline = lpCommandLine;
/* Warn if unsupported features are used */