From: Nobuyoshi Nakada <nobu@...>
Date: 2008-04-24T13:26:27+09:00
Subject: Re: RFC: #19733 - dln_find_1 prioritizes posix naming conventions over Operating System naming conventions.

Hi,

At Thu, 24 Apr 2008 13:17:03 +0900,
Nobuyoshi Nakada wrote in [ruby-core:16548]:
> > Basically, this ticket [1] exposes a problem that annoys and add
> > cross-platform inoperativeness to Ruby. It start with the assumption
> > that an extensionless file have priority over a true windows
> > executable (.exe, com, bat, cmd) and try to use it instead when issue
> > system or any way that calls back into the OS.
> 
> Do you consider files sans extensions shouldn't be returned?

And, rather I want to remove static fbuf in dln.c.


Index: dln.h
===================================================================
--- dln.h	(revision 16174)
+++ dln.h	(working copy)
@@ -31,4 +31,6 @@
 char *dln_find_exe(const char*,const char*);
 char *dln_find_file(const char*,const char*);
+char *dln_find2_exe(const char*,const char*,char*,int);
+char *dln_find2_file(const char*,const char*,char*,int);
 
 #ifdef USE_DLN_A_OUT
Index: dln.c
===================================================================
--- dln.c	(revision 16174)
+++ dln.c	(working copy)
@@ -1569,8 +1569,8 @@ dln_load(const char *file)
 }
 
-static char *dln_find_1(const char *fname, const char *path, int exe_flag);
+static char *dln_find_1(const char *fname, const char *path, char *buf, int size, int exe_flag);
 
 char *
-dln_find_exe(const char *fname, const char *path)
+dln_find_exe2(const char *fname, const char *path, char *buf, int size)
 {
     if (!path) {
@@ -1585,16 +1585,16 @@ dln_find_exe(const char *fname, const ch
 #endif
     }
-    return dln_find_1(fname, path, 1);
+    return dln_find_1(fname, path, buf, size, 1);
 }
 
 char *
-dln_find_file(const char *fname, const char *path)
+dln_find_file2(const char *fname, const char *path, char *buf, int size)
 {
 #ifndef __MACOS__
     if (!path) path = ".";
-    return dln_find_1(fname, path, 0);
+    return dln_find_1(fname, path, buf, size, 0);
 #else
     if (!path) path = ".";
-    return _macruby_path_conv_posix_to_macos(dln_find_1(fname, path, 0));
+    return _macruby_path_conv_posix_to_macos(dln_find_1(fname, path, buf, size, 0));
 #endif
 }
@@ -1602,6 +1602,19 @@ dln_find_file(const char *fname, const c
 static char fbuf[MAXPATHLEN];
 
+char *
+dln_find_exe(const char *fname, const char *path)
+{
+    return dln_find_exe2(fname, path, fbuf, sizeof(fbuf));
+}
+
+char *
+dln_find_file(const char *fname, const char *path)
+{
+    return dln_find_file2(fname, path, fbuf, sizeof(fbuf));
+}
+
 static char *
-dln_find_1(const char *fname, const char *path, int exe_flag /* non 0 if looking for executable. */)
+dln_find_1(const char *fname, const char *path, char *fbuf, int size,
+	   int exe_flag /* non 0 if looking for executable. */)
 {
     register const char *dp;
@@ -1643,5 +1656,5 @@ dln_find_1(const char *fname, const char
 	l = ep - dp;
 	bp = fbuf;
-	fspace = sizeof fbuf - 2;
+	fspace = size - 2;
 	if (l > 0) {
 	    /*
Index: file.c
===================================================================
--- file.c	(revision 16174)
+++ file.c	(working copy)
@@ -4335,9 +4381,10 @@ rb_find_file_ext(VALUE *filep, const cha
 	for (i=0;i<RARRAY_LEN(rb_load_path);i++) {
 	    VALUE str = RARRAY_PTR(rb_load_path)[i];
+	    char fbuf[MAXPATHLEN];
 
 	    FilePathValue(str);
 	    if (RSTRING_LEN(str) == 0) continue;
 	    path = RSTRING_PTR(str);
-	    found = dln_find_file(StringValueCStr(fname), path);
+	    found = dln_find_file2(StringValueCStr(fname), path, fbuf, sizeof(fbuf));
 	    if (found && file_load_ok(found)) {
 		*filep = rb_str_new2(found);
@@ -4355,4 +4402,5 @@ rb_find_file(VALUE path)
     char *f = StringValueCStr(path);
     char *lpath;
+    char fbuf[MAXPATHLEN];
 
     if (f[0] == '~') {
@@ -4412,5 +4460,5 @@ rb_find_file(VALUE path)
 	return 0;		/* no path, no load */
     }
-    if (!(f = dln_find_file(f, lpath))) {
+    if (!(f = dln_find_file2(f, lpath, fbuf, sizeof(fbuf)))) {
 	return 0;
     }
Index: process.c
===================================================================
--- process.c	(revision 16174)
+++ process.c	(working copy)
@@ -949,5 +950,5 @@ void rb_thread_reset_timer_thread(void);
   (rb_thread_start_timer_thread(), rb_disable_interrupt())
 
-extern char *dln_find_exe(const char *fname, const char *path);
+#include "dln.h"
 
 static void
@@ -964,7 +965,9 @@ static int
 proc_exec_v(char **argv, const char *prog)
 {
+    char fbuf[MAXPATHLEN];
+
     if (!prog)
 	prog = argv[0];
-    prog = dln_find_exe(prog, 0);
+    prog = dln_find_exe2(prog, 0, fbuf, sizeof(fbuf));
     if (!prog) {
 	errno = ENOENT;
@@ -1001,5 +1004,5 @@ proc_exec_v(char **argv, const char *pro
 	    new_argv[0] = COMMAND;
 	    argv = new_argv;
-	    prog = dln_find_exe(argv[0], 0);
+	    prog = dln_find_exe2(argv[0], 0, fbuf, sizeof(fbuf));
 	    if (!prog) {
 		errno = ENOENT;
@@ -1065,5 +1079,6 @@ rb_proc_exec(const char *str)
 		exit(status);
 #elif defined(__human68k__) || defined(__CYGWIN32__) || defined(__EMX__)
-	    char *shell = dln_find_exe("sh", 0);
+	    char fbuf[MAXPATHLEN];
+	    char *shell = dln_find_exe2("sh", 0, fbuf, sizeof(fbuf));
 	    int status = -1;
 	    before_exec();
@@ -1112,4 +1127,5 @@ static rb_pid_t
 proc_spawn_v(char **argv, char *prog)
 {
+    char fbuf[MAXPATHLEN];
     char *extension;
     rb_pid_t status;
@@ -1118,5 +1134,5 @@ proc_spawn_v(char **argv, char *prog)
 	prog = argv[0];
     security(prog);
-    prog = dln_find_exe(prog, 0);
+    prog = dln_find_exe2(prog, 0, fbuf, sizeof(fbuf));
     if (!prog)
 	return -1;
@@ -1139,5 +1155,5 @@ proc_spawn_v(char **argv, char *prog)
 	new_argv[0] = COMMAND;
 	argv = new_argv;
-	prog = dln_find_exe(argv[0], 0);
+	prog = dln_find_exe2(argv[0], 0, fbuf, sizeof(fbuf));
 	if (!prog) {
 	    errno = ENOENT;
@@ -1176,4 +1192,5 @@ static rb_pid_t
 proc_spawn(char *str)
 {
+    char fbuf[MAXPATHLEN];
     char *s, *t;
     char **argv, **a;
@@ -1182,5 +1199,5 @@ proc_spawn(char *str)
     for (s = str; *s; s++) {
 	if (*s != ' ' && !ISALPHA(*s) && strchr("*?{}[]<>()~&|\\$;'`\"\n",*s)) {
-	    char *shell = dln_find_exe("sh", 0);
+	    char *shell = dln_find_exe2("sh", 0, fbuf, sizeof(fbuf));
 	    before_exec();
 	    status = shell?spawnl(P_WAIT,shell,"sh","-c",str,(char*)NULL):system(str);
@@ -949,6 +984,7 @@ process_options(VALUE arg)
     NODE *tree = 0;
     VALUE parser;
     rb_encoding *enc;
     const char *s;
+    char fbuf[MAXPATHLEN];
     int i = proc_options(argc, argv, opt);
 
@@ -1031,8 +1067,8 @@ process_options(VALUE arg)
 		opt->script = 0;
 		if (path) {
-		    opt->script = dln_find_file(argv[0], path);
+		    opt->script = dln_find_file2(argv[0], path, fbuf, sizeof(fbuf));
 		}
 		if (!opt->script) {
-		    opt->script = dln_find_file(argv[0], getenv(PATH_ENV));
+		    opt->script = dln_find_file(argv[0], getenv(PATH_ENV), fbuf, sizeof(fbuf));
 		}
 		if (!opt->script)


-- 
Nobu Nakada