- note about still failing alpha tests

[packages/glibc.git] / glibc-postshell.patch

diff -urN glibc-2.3.1-/elf/Makefile glibc-2.3.1/elf/Makefile
--- glibc-2.3.1-/elf/Makefile	Thu Oct 17 15:21:30 2002
+++ glibc-2.3.1/elf/Makefile	Thu Oct 17 15:18:20 2002
@@ -95,7 +95,7 @@
 install-bin-script = ldd
 endif
 
-others		= sprof sln
+others		= postshell sprof sln
 install-bin	= sprof
 others-static   = sln
 install-rootsbin = sln
diff -urN glibc-2.3.1-/elf/postshell.c glibc-2.3.1/elf/postshell.c
--- glibc-2.3.1-/elf/postshell.c	Thu Jan  1 01:00:00 1970
+++ glibc-2.3.1/elf/postshell.c	Thu Oct 17 14:54:34 2002
@@ -0,0 +1,216 @@
+/*
+ * Copyright (c) 2002 Michal Moskal <malekith@pld-linux.org>.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by Michal Moskal.
+ * 4. Neither the name of the author nor the names of any co-contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY MICHAL MOSKAL AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+/*
+ * Usage
+ * ~~~~~
+ *
+ * This simple program is aimed to be used as script interpreter in rpm
+ * %post scriptlets and the like. It opens file passed as first argument
+ * and executes commands found there. Only linear execution is supported.
+ * For example, in glibc.spec:
+ *
+ * %post -p /sbin/postshell
+ * ldconfig
+ * -telinit q
+ *
+ * (full patch like /sbin/ldconfig or -/sbin/tellinit will also work).
+ *
+ * If command starts with - its exit status is ignored. Otherwise last 
+ * non-zero exit status is returned.
+ *
+ * There are no builtin commands (yet :).
+ *
+ * Following commands *will* work as expected (as in Bourne shell):
+ *
+ * /bin/echo "Foo     bar baz"
+ * insmod foobar options="foo bar 'qux'"
+ * false
+ *
+ * Following *won't*:
+ *
+ * exit 1
+ * echo foo || echo baz
+ * set -x
+ * 
+ * Patches and bugreports are welcome, direct them to Michal Moskal
+ * <malekith@pld-linux.org>.
+ */
+
+#define _GNU_SOURCE
+#include <sys/types.h>
+#include <sys/wait.h>
+#include <unistd.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#define MAX_LINE 1024
+#define MAX_ARGS 32
+#define SEARCH_PATH { "/sbin/", "/bin/", "/usr/sbin/", "/usr/bin/", NULL }
+
+int exit_status;
+int ignore_status;
+
+void do_execve(char **argv)
+{
+	char *path[] = SEARCH_PATH;
+	char file[MAX_LINE + 100];
+	int i; 
+
+	if (**argv == '.' || **argv == '/')
+		execve(argv[0], argv, environ);
+	else 
+		for (i = 0; path[i]; i++) {
+			strcpy(file, path[i]);
+			strcat(file, argv[0]);
+			execve(file, argv, environ);
+		}
+}
+
+int exec_and_wait(char **argv)
+{
+	pid_t pid;
+
+	pid = fork();
+
+	if (pid == -1) {
+		perror("fork");
+		return -1;
+	} else if (pid == 0) {
+		/* child. */
+		do_execve(argv);
+		if (!ignore_status) 
+			perror(argv[0]); 
+		exit(127);
+	} else {
+		int status, err;
+		
+		err = waitpid(pid, &status, 0);
+		if (err < 0) {
+			perror("waitpid");
+			return -1;
+		} else
+			return WEXITSTATUS(status);
+	}
+}
+
+void split_argv(char **argv, char *s)
+{
+	char *dst;
+	int argc, delim;
+	
+	for (argc = 0; argc < MAX_ARGS; argc++) {
+		while (*s == ' ' || *s == '\t')
+			s++;
+
+		if (*s == 0)
+			break;
+
+		argv[argc] = s;
+		dst = s;
+		
+		while (*s && *s != ' ' && *s != '\t') {
+			if (*s == '\'' || *s == '"') {
+				delim = *s++;
+				while (*s && *s != delim)
+					*dst++ = *s++;
+				if (*s)
+					s++;
+			} else {
+				*dst++ = *s++;
+			}
+		}
+
+		if (*dst) {
+			if (s == dst)
+				s++;
+			*dst++ = 0;
+		}
+	}
+
+	argv[argc] = NULL;
+}
+
+void exec_line(char *s)
+{
+	char *argv[MAX_ARGS + 1];
+	int ret;
+
+	split_argv(argv, s);
+	
+	ignore_status = 0;
+
+	if (**argv == '-') {
+		ignore_status++;
+		(*argv)++;
+	}
+
+	ret = exec_and_wait(argv);
+
+	if (ret && !ignore_status)
+		exit_status = ret;
+}
+
+void exec_file(FILE *f)
+{
+	char line[MAX_LINE];
+
+	while (fgets(line, sizeof(line), f)) {
+		/* chomp it */
+		if (line[strlen(line) - 1] == '\n')
+			line[strlen(line) - 1] = 0;
+		/* and exec. */
+		exec_line(line);
+	}
+}
+
+int main(int argc, char **argv)
+{
+	FILE *f;
+
+	if (argc < 2) {
+		fprintf(stderr, "USAGE: %s filename\n", argv[0]);
+		exit(1);
+	}
+
+	f = fopen(argv[1], "r");
+	
+	if (f == NULL) {
+		perror(argv[1]);
+		exit(1);
+	}
+
+	exec_file(f);
+	fclose(f);
+	exit(exit_status);
+}