Author: glen Date: Fri Jun 17 16:13:03 2005 GMT
Module: SOURCES Tag: HEAD
---- Log message:
- saved from glibc-postshell.patch
---- Files affected:
SOURCES:
postshell.c (1.2 -> 1.3) (NEW)
---- Diffs:
================================================================
Index: SOURCES/postshell.c
diff -u /dev/null SOURCES/postshell.c:1.3
--- /dev/null Fri Jun 17 18:13:03 2005
+++ SOURCES/postshell.c Fri Jun 17 18:12:57 2005
@@ -0,0 +1,216 @@
+/*
+ * Copyright (c) 2002 Michal Moskal <malekith at 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 at 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);
+}
================================================================