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Instead of a single exists(), differentiate between files, modules, 

executable files, and directories.  When expecting a module, we also
look for the .pyc or .pyo file.
This commit is contained in:
Guido van Rossum 1998-01-19 22:06:22 +00:00
parent 73bacfc3d7
commit d29806c37e
1 changed files with 70 additions and 13 deletions
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83
Modules/getpath.c
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@ -164,14 +164,71 @@ reduce(dir)
--i;
dir[i] = '\0';
}
#ifndef S_ISREG
#define S_ISREG(x) (((x) & S_IFMT) == S_IFREG)
#endif
#ifndef S_ISDIR
#define S_ISDIR(x) (((x) & S_IFMT) == S_IFDIR)
#endif
static int
exists(filename)
isfile(filename) /* Is file, not directory */
char *filename;
{
struct stat buf;
return stat(filename, &buf) == 0;
if (stat(filename, &buf) != 0)
return 0;
if (!S_ISREG(buf.st_mode))
return 0;
return 1;
}
static int
ismodule(filename) /* Is module -- check for .pyc/.pyo too */
char *filename;
{
if (isfile(filename))
return 1;
/* Check for the compiled version of prefix. */
if (strlen(filename) < MAXPATHLEN) {
strcat(filename, Py_OptimizeFlag ? "o" : "c");
if (isfile(filename))
return 1;
}
return 0;
}
static int
isxfile(filename) /* Is executable file */
char *filename;
{
struct stat buf;
if (stat(filename, &buf) != 0)
return 0;
if (!S_ISREG(buf.st_mode))
return 0;
if ((buf.st_mode & 0111) == 0)
return 0;
return 1;
}
static int
isdir(filename) /* Is directory */
char *filename;
{
struct stat buf;
if (stat(filename, &buf) != 0)
return 0;
if (!S_ISDIR(buf.st_mode))
return 0;
return 1;
}
@ -207,7 +264,7 @@ search_for_prefix(argv0_path, home)
/* Check to see if argv[0] is in the build directory */
strcpy(prefix, argv0_path);
joinpath(prefix, "Modules/Setup");
if (exists(prefix)) {
if (isfile(prefix)) {
/* Check VPATH to see if argv0_path is in the build directory.
* Complication: the VPATH passed in is relative to the
* Modules build directory and points to the Modules source
@ -225,7 +282,7 @@ search_for_prefix(argv0_path, home)
reduce(prefix);
joinpath(prefix, "Lib");
joinpath(prefix, LANDMARK);
if (exists(prefix))
if (ismodule(prefix))
return -1;
}
@ -238,7 +295,7 @@ search_for_prefix(argv0_path, home)
*delim = '\0';
joinpath(prefix, lib_python);
joinpath(prefix, LANDMARK);
if (exists(prefix))
if (ismodule(prefix))
return 1;
}
@ -248,7 +305,7 @@ search_for_prefix(argv0_path, home)
n = strlen(prefix);
joinpath(prefix, lib_python);
joinpath(prefix, LANDMARK);
if (exists(prefix))
if (ismodule(prefix))
return 1;
prefix[n] = '\0';
reduce(prefix);
@ -258,7 +315,7 @@ search_for_prefix(argv0_path, home)
strcpy(prefix, PREFIX);
joinpath(prefix, lib_python);
joinpath(prefix, LANDMARK);
if (exists(prefix))
if (ismodule(prefix))
return 1;
/* Fail */
@ -276,7 +333,7 @@ search_for_exec_prefix(argv0_path, home)
/* Check to see if argv[0] is in the build directory */
strcpy(exec_prefix, argv0_path);
joinpath(exec_prefix, "Modules/Setup");
if (exists(exec_prefix)) {
if (isfile(exec_prefix)) {
reduce(exec_prefix);
return -1;
}
@ -291,7 +348,7 @@ search_for_exec_prefix(argv0_path, home)
strcpy(exec_prefix, home);
joinpath(exec_prefix, lib_python);
joinpath(exec_prefix, "lib-dynload");
if (exists(exec_prefix))
if (isdir(exec_prefix))
return 1;
}
@ -301,7 +358,7 @@ search_for_exec_prefix(argv0_path, home)
n = strlen(exec_prefix);
joinpath(exec_prefix, lib_python);
joinpath(exec_prefix, "lib-dynload");
if (exists(exec_prefix))
if (isdir(exec_prefix))
return 1;
exec_prefix[n] = '\0';
reduce(exec_prefix);
@ -311,7 +368,7 @@ search_for_exec_prefix(argv0_path, home)
strcpy(exec_prefix, EXEC_PREFIX);
joinpath(exec_prefix, lib_python);
joinpath(exec_prefix, "lib-dynload");
if (exists(exec_prefix))
if (isdir(exec_prefix))
return 1;
/* Fail */
@ -361,7 +418,7 @@ calculate_path()
strcpy(progpath, path);
joinpath(progpath, prog);
if (exists(progpath))
if (isxfile(progpath))
break;
if (!delim) {