- saved from glibc-postshell.patch

Changed files:
    postshell.c -> 1.3

diff --git a/postshell.c b/postshell.c
new file mode 100644 (file)
index 0000000..1d68fb0
--- /dev/null
+++ b/postshell.c
@@ -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);
+}