1 files changed, 228 insertions, 0 deletions
diff --git a/sys-devel/gcc-config/files/wrapper-1.4.c b/sys-devel/gcc-config/files/wrapper-1.4.c
new file mode 100644
index 000000000000..049ae72c92e0
--- /dev/null
+++ b/sys-devel/gcc-config/files/wrapper-1.4.c
@@ -0,0 +1,228 @@
+/*
+ * Copyright 1999-2003 Gentoo Technologies, Inc.
+ * Distributed under the terms of the GNU General Public License v2
+ * Author: Martin Schlemmer <azarah@gentoo.org>
+ * $Header: /var/cvsroot/gentoo-x86/sys-devel/gcc-config/files/wrapper-1.4.c,v 1.1 2003/02/23 16:20:10 azarah Exp $
+ */
+
+#define _REENTRANT
+#define _GNU_SOURCE
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <sys/param.h>
+#include <unistd.h>
+#include <wait.h>
+#include <libgen.h>
+#include <string.h>
+#include <stdarg.h>
+#include <errno.h>
+
+struct wrapper_data {
+	char name[MAXPATHLEN + 1];
+	char fullname[MAXPATHLEN + 1];
+	char bin[MAXPATHLEN + 1];
+	char tmp[MAXPATHLEN + 1];
+	
+	char *path;
+};
+
+static const char *wrapper_strerror(int err, struct wrapper_data *data)
+{
+	strerror_r(err, data->tmp, sizeof(data->tmp));
+	return data->tmp;
+}
+
+static void wrapper_exit(char *msg, ...)
+{   
+	va_list args;
+	va_start(args, msg);
+	vfprintf(stderr, msg, args);
+	va_end(args);
+	exit(1);
+}
+
+/* find_bin checks in path for the file we are seeking 
+   it returns 1 if found (with data->bin setup), 0 if not
+    and negative on error */
+static int check_for_target(char *path, struct wrapper_data *data) 
+{
+	struct stat sbuf;
+	int result = 0;
+	char *str = data->tmp;
+	size_t len = strlen(path) + strlen(data->name) + 2;
+
+	snprintf(str, len, "%s/%s", path, data->name);
+
+	/* Stat possible file to check that
+	   1) it exist and is a regular file, and
+	   2) it is not the wrapper itself, and
+	   3) it is in a /gcc-bin/ directory tree */
+	result = stat(str, &sbuf);
+	if ((0 == result) && (sbuf.st_mode & S_IFREG) && 
+	    (0 != strcmp(str, data->fullname)) && 
+	    (0 != strstr(str, "/gcc-bin/"))) {
+		strncpy(data->bin, str, MAXPATHLEN);
+		data->bin[MAXPATHLEN] = 0;
+		result = 1;
+	}
+	else
+		result = 0;
+		
+	return result;
+}
+
+static int find_target_in_path(struct wrapper_data *data)
+{
+	char *token = NULL, *str = data->tmp, *state;
+	
+	if (NULL == data->path) return 0;
+
+	/* Make a copy since strtok_r will modify path */
+	snprintf(str, MAXPATHLEN + 1, "%s", data->path);
+	
+	token = strtok_r(str, ":", &state);
+
+	/* Find the first file with suitable name in PATH.  The idea here is
+	 * that we do not want to bind ourselfs to something static like the
+	 * default profile, or some odd environment variable, but want to be
+	 * able to build something with a non default gcc by just tweaking
+	 * the PATH ... */
+	while ((NULL != token) && (strlen(token) > 0)) {
+		if (check_for_target(token, data))
+			return 1;
+		
+		token = strtok_r(NULL, ":", &state);
+	}
+	
+	return 0;
+}
+
+static void find_wrapper_target(struct wrapper_data *data) 
+{
+	FILE *inpipe = NULL;
+	char *str = data->tmp;
+	
+	if (find_target_in_path(data))
+		return;
+	
+	/* Only our wrapper is in PATH, so 
+	   get the CC path using gcc-config and 
+	   execute the real binary in there... */
+	inpipe = popen("/usr/bin/gcc-config --get-bin-path", "r");
+	if (NULL == inpipe) {
+		wrapper_exit(
+			"Could not open pipe for /usr/bin/gcc-config: %s\n",
+			wrapper_strerror(errno, data));
+	}
+
+	if (0 == fgets(str, MAXPATHLEN, inpipe))
+		wrapper_exit("Could not get compiler binary path: %s\n",
+			wrapper_strerror(errno, data));
+
+	strncpy(data->bin, str, sizeof(data->bin) - 1);
+	data->bin[strlen(data->bin) - 1] = '/';
+	strncat(data->bin, data->name, sizeof(data->bin) - 1);
+	data->bin[MAXPATHLEN] = 0;
+
+	pclose(inpipe);
+}
+
+/* This function modifies PATH to have gcc's bin path appended */
+static void modify_path(struct wrapper_data *data)
+{
+	char *newpath = NULL, *token = NULL, *state;
+	char dname_data[MAXPATHLEN + 1];
+	char *str = data->tmp, *str2 = dname_data, *dname = dname_data;
+	size_t len = 0;
+
+	if (NULL == data->bin)
+		return;
+
+	snprintf(str2, MAXPATHLEN + 1, "%s", data->bin);
+
+	if (NULL == (dname = dirname(str2)))
+		return;
+
+	if (NULL == data->path)
+		return;
+
+	/* Make a copy since strtok_r will modify path */
+	snprintf(str, MAXPATHLEN + 1, "%s", data->path);
+
+	token = strtok_r(str, ":", &state);
+
+	/* Check if we already appended our bin location to PATH */
+	if ((NULL != token) && (strlen(token) > 0)) {
+		if (0 == strcmp(token, dname))
+			return;
+	}
+
+	len = strlen(dname) + strlen(data->path) + 2;
+
+	newpath = (char *)malloc(len);
+	if (NULL == newpath)
+		wrapper_exit("wrapper: out of memory\n");
+	memset(newpath, 0, len);
+
+	snprintf(newpath, len, "%s:%s", dname, data->path);
+	setenv("PATH", newpath, 1);
+
+	if (newpath)
+		free(newpath);
+	newpath = NULL;
+}
+
+int main(int argc, char **argv) 
+{
+	struct wrapper_data *data;
+	size_t size;
+	char *path;
+	int result = 0;
+
+	data = alloca(sizeof(*data));
+	if (NULL == data) 
+		wrapper_exit("%s wrapper: out of memory\n", argv[0]);
+	memset(data, 0, sizeof(*data));
+
+	path = getenv("PATH");
+	if (NULL != path) {
+		data->path = strdup(getenv("PATH"));
+		if (NULL == data->path) 
+			wrapper_exit("%s wrapper: out of memory\n", argv[0]);
+	}
+		
+	/* What should we find ? */
+	strcpy(data->name, basename(argv[0]));
+
+	/* cc calls "/full/path/to/gcc" ... */
+	if (0 == strcmp(data->name, "cc"))
+		strcpy(data->name, "gcc");
+
+	/* What is the full name of our wrapper? */
+	size = sizeof(data->fullname);
+	result = snprintf(data->fullname, size, "/usr/bin/%s", data->name);
+	if ((-1 == result) || (result > size))
+		wrapper_exit("invalid wrapper name: \"%s\"\n", data->name);
+
+	find_wrapper_target(data);
+
+	modify_path(data);
+
+	if (data->path)
+		free(data->path);
+	data->path = NULL;
+
+	/* Set argv[0] to the correct binary, else gcc do not find internal
+	 * headers, etc (bug #8132). */
+	argv[0] = data->bin;
+
+	/* Ok, do it ... */
+	if (execv(data->bin, argv) < 0)
+		wrapper_exit("Could not run/locate \"%s\"\n", data->name);
+	
+	return 0;
+}
+