prepare for new release with Merge pull request neurobin#83 from RKX1…

…209/fix_nullptr_ref

ChangeLog

@@ -1,5 +1,10 @@
 CHANGES
 
+4.0.2 Mon 01 Jul 2019 02:57:36 PM UTC
+
+    * Fix typo
+    * Fix NULL-ptr dereference in shll string (Thanks to Ren Kimura<https://github.com/RKX1209>)
+
 4.0.1 Tue Nov 20 08:22:20 UTC 2018
 
     * Add LDFLAGS environment variable (Thanks to zboszor <https://github.com/zboszor>)

configure.ac

@@ -1,4 +1,4 @@
-AC_INIT([shc], [4.0.1], [http://github.com/neurobin/shc/issues])
+AC_INIT([shc], [4.0.2], [http://github.com/neurobin/shc/issues])
 AC_CONFIG_AUX_DIR(config)
 #prefix="/usr"
 AC_CONFIG_SRCDIR([src/shc.c])

man.html

@@ -44,7 +44,7 @@ <h1 id="description">DESCRIPTION</h1>
 <p>If you supply an expiration date with the <code>-e</code> option, the compiled binary will refuse to run after the date specified. The message <strong>Please contact your provider</strong> will be displayed instead. This message can be changed with the <code>-m</code> option.</p>
 <p>You can compile any kind of shell script, but you need to supply valid <code>-i</code>, <code>-x</code> and <code>-l</code> options.</p>
 <p>The compiled binary will still be dependent on the shell specified in the first line of the shell code (i.e. <code>#!/bin/sh</code>), thus <strong>shc</strong> does not create completely independent binaries.</p>
-<p><strong>shc</strong> itself is not a compiler such as cc, it rather encodes and encrypts a shell script and generates C source code with the added expiration capability. It then uses the system compiler to compile a stripped binary which behaves exactly like the original script. Upon execution, the compiled binary will decrypt and execute the code with the shell <code>-c</code> option. Unfortunatelly, it will not give you any speed improvement as a real C program would.</p>
+<p><strong>shc</strong> itself is not a compiler such as cc, it rather encodes and encrypts a shell script and generates C source code with the added expiration capability. It then uses the system compiler to compile a stripped binary which behaves exactly like the original script. Upon execution, the compiled binary will decrypt and execute the code with the shell <code>-c</code> option. Unfortunately, it will not give you any speed improvement as a real C program would.</p>
 <p><strong>shc</strong>'s main purpose is to protect your shell scripts from modification or inspection. You can use it if you wish to distribute your scripts but don't want them to be easily readable by other people.</p>
 <h1 id="options">OPTIONS</h1>
 <p>-e <em>date</em> : Expiration date in <em>dd/mm/yyyy</em> format <code>[none]</code></p>

man.md

@@ -27,7 +27,7 @@ thus **shc** does not create completely independent binaries.
 **shc** itself is not a compiler such as cc, it rather encodes and encrypts a shell script and generates C source code with the added expiration capability. 
 It then uses the system compiler to compile a stripped binary which behaves exactly like the original script.
 Upon execution, the compiled binary will decrypt and execute the code with the shell `-c` option.
-Unfortunatelly, it will not give you any speed improvement as a real C program would.
+Unfortunately, it will not give you any speed improvement as a real C program would.
 
 **shc**'s main purpose is to protect your shell scripts from modification or inspection.
 You can use it if you wish to distribute your scripts but don't want them to be easily readable by other people.   

shc.1

@@ -40,7 +40,7 @@ It then uses the system compiler to compile a stripped binary which
 behaves exactly like the original script.
 Upon execution, the compiled binary will decrypt and execute the code
 with the shell \f[C]\-c\f[] option.
-Unfortunatelly, it will not give you any speed improvement as a real C
+Unfortunately, it will not give you any speed improvement as a real C
 program would.
 .PP
 \f[B]shc\f[]\[aq]s main purpose is to protect your shell scripts from

src/shc.c

@@ -17,7 +17,7 @@
  */
 
 static const char my_name[] = "shc";
-static const char version[] = "Version 4.0.1";
+static const char version[] = "Version 4.0.2";
 static const char subject[] = "Generic Shell Script Compiler";
 static const char cpright[] = "GNU GPL Version 3";
 static const struct { const char * f, * s, * e; }
@@ -265,7 +265,7 @@ static const char * RTC[] = {
 "    BPF_STMT(BPF_LD+BPF_W+BPF_ABS, offsetof(struct seccomp_data, nr)),",
 "",
 "    /* list of allowed syscalls */",
-"    Allow(exit_group),  /* exits a processs */",
+"    Allow(exit_group),  /* exits a process */",
 "    Allow(brk),         /* for malloc(), inside libc */",
 "    Allow(mmap),        /* also for malloc() */",
 "    Allow(munmap),      /* for free(), inside libc */",
@@ -971,6 +971,10 @@ int eval_shell(char * text)
 
 	shll = realloc(shll, strlen(shll) + 1);
 	ptr  = strrchr(shll, (int)'/');
+	if (!ptr) {
+		fprintf(stderr, "%s: invalid shll\n", my_name);
+		return -1;
+	}
 	if (*ptr == '/')
 		ptr++;
 	if (verbose) fprintf(stderr, "%s shll=%s\n", my_name, ptr);