[gentoo-python] [PATCH 4/4] Remove python-wrapper

[Michał Górny]

---
 Makefile.am      |   3 -
 configure.ac     |  26 ------
 python-wrapper.c | 244 -------------------------------------------------------
 3 files changed, 273 deletions(-)
 delete mode 100644 python-wrapper.c

diff --git a/Makefile.am b/Makefile.am
index 06f7d1c..beb4029 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -1,5 +1,2 @@
-bin_PROGRAMS = python-wrapper
-python_wrapper_CPPFLAGS = -DENVD='"$(sysconfdir)/env.d"'
-
 eselectdir = $(datadir)/eselect/modules
 nodist_eselect_DATA = python.eselect
diff --git a/configure.ac b/configure.ac
index dc142ae..e782129 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1,36 +1,10 @@
 AC_INIT([eselect-python], [20140125])
 AM_INIT_AUTOMAKE([-Wall foreign no-dist-gzip dist-bzip2])
 
-AC_PROG_CC
 AC_PATH_PROG(INSTALL, install)
 AC_PROG_MKDIR_P
 
-AC_USE_SYSTEM_EXTENSIONS
-
-# setenv() was introduced in POSIX.1-2008.
-# strtok_r() was introduced in POSIX.1-2001.
-AC_CHECK_FUNCS([setenv strtok_r])
-
-# strndup() was introduced in POSIX.1-2008 and is also an implicitly declared built-in function in GCC.
-AC_MSG_CHECKING([for strndup])
-old_CFLAGS="${CFLAGS}"
-CFLAGS="${CFLAGS} -Wall -Werror -Wextra"
-AC_LINK_IFELSE([AC_LANG_SOURCE([[#include <string.h>
-int main()
-{
-  strndup("", 0);
-  return 0;
-}]])], [have_strndup="1"], [have_strndup="0"])
-if test "${have_strndup}" = "1"; then
-  AC_MSG_RESULT([yes])
-  AC_DEFINE([HAVE_STRNDUP], [1], [Define to 1 if you have the 'strndup' function.])
-else
-  AC_MSG_RESULT([no])
-fi
-CFLAGS="${old_CFLAGS}"
-
 # Create output files.
-AC_CONFIG_HEADERS([config.h])
 AC_CONFIG_FILES([Makefile python.eselect])
 
 AC_OUTPUT
diff --git a/python-wrapper.c b/python-wrapper.c
deleted file mode 100644
index 75a1de4..0000000
--- a/python-wrapper.c
+++ /dev/null
@@ -1,244 +0,0 @@
-/* Copyright 1999-2010 Gentoo Foundation
- * Distributed under the terms of the GNU General Public License v2
- */
-
-#include "config.h"
-
-#include <dirent.h>
-#include <limits.h>
-#include <stdlib.h>
-#include <stdio.h>
-#include <string.h>
-#include <unistd.h>
-#include <sys/stat.h>
-
-#ifndef ENVD
-#define ENVD "/etc/env.d"
-#endif
-
-#define ENVD_CONFIG ENVD "/python/config"
-
-/* 127 is the standard return code for "command not found" */
-#define EXIT_ERROR 127
-
-char* dir_cat(const char* dir, const char* file)
-{
-	size_t dir_len = strlen(dir);
-	char* abs = malloc(dir_len + strlen(file) + 2);
-	strcpy(abs, dir);
-	abs[dir_len] = '/';
-	abs[dir_len + 1] = 0;
-	return strcat(abs, file);
-}
-
-const char* find_path(const char* exe)
-{
-	const char* last_slash = strrchr(exe, '/');
-	if (last_slash)
-	{
-#ifdef HAVE_STRNDUP
-		return strndup(exe, last_slash - exe);
-#else
-		size_t len = last_slash - exe;
-		char* ret = malloc(sizeof(char) * (len + 1));
-		memcpy(ret, exe, len);
-		ret[len] = '\0';
-		return(ret);
-#endif
-	}
-	const char* PATH = getenv("PATH");
-	if (! PATH)
-	{
-		/* If PATH is unset, then it defaults to ":/bin:/usr/bin", per
-		 * execvp(3).
-		 */
-		PATH = ":/bin:/usr/bin";
-	}
-	char* path = strdup(PATH);
-#ifdef HAVE_STRTOK_R
-	char* state = NULL;
-	const char* token = strtok_r(path, ":", &state);
-#else
-	const char* token = strtok(path, ":");
-#endif
-	while (token)
-	{
-		/* If an element of PATH is empty ("::"), then it is "." */
-		if (! *token)
-		{
-			token = ".";
-		}
-		struct stat sbuf;
-		char* str = dir_cat(token, exe);
-		if (stat(str, &sbuf) == 0 && (S_ISREG(sbuf.st_mode) || S_ISLNK(sbuf.st_mode)))
-		{
-			return token;
-		}
-#ifdef HAVE_STRTOK_R
-		token = strtok_r(NULL, ":", &state);
-#else
-		token = strtok(NULL, ":");
-#endif
-	}
-	return NULL;
-}
-
-/* True if a valid file name, and not "python" */
-int valid_interpreter(const char* name)
-{
-	if (! name || ! *name || (strcmp(name, "python") == 0))
-	{
-		return 0;
-	}
-	return 1;
-}
-
-int get_version(const char* name)
-{
-	/* Only find files beginning with "python" - this is a fallback,
-	 * so we only want CPython
-	 */
-	if (! valid_interpreter(name) || strncmp(name, "python", 6) != 0)
-		return -1;
-	int pos = 6;
-	int major = 0;
-	int minor = 0;
-	if (name[pos] < '0' || name[pos] > '9')
-		return -1;
-	do
-	{
-		major = major * 10 + name[pos] - '0';
-		if (! name[++pos])
-			return -1;
-	}
-	while (name[pos] >= '0' && name[pos] <= '9');
-	if (name[pos++] != '.')
-		return -1;
-	if (name[pos] < '0' || name[pos] > '9')
-		return -1;
-	do
-	{
-		minor = minor * 10 + name[pos] - '0';
-		if (! name[++pos])
-			return (major << 8) | minor;
-	}
-	while (name[pos] >= '0' && name[pos] <= '9');
-	return -1;
-}
-
-int filter_python(const struct dirent* file)
-{
-	return get_version(file->d_name) != -1;
-}
-
-/* This implements a version sort, such that the following order applies:
- *    <invalid file names> (should never be seen)
- *    python2.6
- *    python2.9
- *    python2.10
- *    python3.0
- *    python3.1
- *    python3.2
- *    python9.1
- *    python9.9
- *    python9.10
- *    python10.1
- *    python10.9
- *    python10.10
- */
-int sort_python(const struct dirent**f1, const struct dirent** f2)
-{
-	int ver1 = get_version((*f1)->d_name);
-	int ver2 = get_version((*f2)->d_name);
-	return ver1 - ver2;
-}
-
-const char* find_latest(const char* exe)
-{
-	const char* path = find_path(exe);
-	if (! path || ! *path)
-	{
-		path = "/usr/bin";
-	}
-	struct dirent** namelist;
-	int n = scandir(path, &namelist, filter_python, sort_python);
-	const char* ret = NULL;
-	if (n < 0)
-	{
-		return NULL;
-	}
-	/* Walk backwards through the list. */
-	while (n--)
-	{
-		if (! ret)
-			ret = strdup(namelist[n]->d_name);
-		free(namelist[n]);
-	}
-	free(namelist);
-	return ret;
-}
-
-int main(int argc, char** argv)
-{
-	const char* EPYTHON = getenv("EPYTHON");
-	int script_name_index = -1;
-	if (! valid_interpreter(EPYTHON))
-	{
-		FILE* f = fopen(ENVD_CONFIG, "r");
-		if (f)
-		{
-			struct stat st;
-			fstat(fileno(f), &st);
-			size_t size = st.st_size;
-			char* cont = malloc(size + 1);
-			cont = fgets(cont, size + 1, f);
-			fclose(f);
-			size_t len = strlen(cont);
-			if (len && cont[len - 1] == '\n')
-				cont[len - 1] = 0;
-			EPYTHON = cont;
-		}
-	}
-
-	if (! valid_interpreter(EPYTHON))
-		EPYTHON = find_latest(argv[0]);
-
-	if (! EPYTHON)
-		return EXIT_ERROR;
-
-	if (strchr(EPYTHON, '/'))
-	{
-		fprintf(stderr, "Invalid value of EPYTHON variable or invalid configuration of Python wrapper\n");
-		return EXIT_ERROR;
-	}
-
-	/* Set GENTOO_PYTHON_PROCESS_NAME environmental variable, if a script with a Python shebang is probably being executed.
-	 * argv[0] can be "python", when "#!/usr/bin/env python" shebang is used. */
-	if (argc >= 2 && (argv[0][0] == '/' || strcmp(argv[0], "python") == 0) && (argv[1][0] == '/' || strncmp(argv[1], "./", 2) == 0))
-		script_name_index = 1;
-	else if (argc >= 3 && argv[0][0] == '/' && argv[1][0] == '-' && (argv[2][0] == '/' || strncmp(argv[2], "./", 2) == 0))
-		script_name_index = 2;
-	if (script_name_index > 0)
-	{
-		char* script_name = strrchr(argv[script_name_index], '/') + 1;
-#ifdef HAVE_SETENV
-		setenv("GENTOO_PYTHON_PROCESS_NAME", script_name, 1);
-#else
-		char* script_name_variable = malloc(sizeof(char) * (strlen("GENTOO_PYTHON_PROCESS_NAME=") + strlen(script_name)));
-		sprintf(script_name_variable, "GENTOO_PYTHON_PROCESS_NAME=%s", script_name);
-		putenv(script_name_variable);
-#endif
-	}
-
-	const char* path = find_path(argv[0]);
-	if (path)
-	{
-		argv[0] = dir_cat(path, EPYTHON);
-		execv(argv[0], argv);
-		/* If this failed, then just search the PATH. */
-	}
-
-	argv[0] = (char*) EPYTHON;
-	execvp(EPYTHON, argv);
-	return EXIT_ERROR;
-}
-- 
2.6.3