make grep's path adjustable for PANICTRACE + more bits

Mac OS X doesn't have /bin/grep, only /usr/bin/grep.  Grr.
Don't try to parse PANICTRACE_GLIBC if the field doesn't exist.

include/sys.h

@@ -23,6 +23,7 @@ struct sysopt {
 #ifdef PANICTRACE
 		/* panic options */
 	char *gdbpath;
+	char *greppath;
 	int  panictrace_gdb;
 # ifdef PANICTRACE_GLIBC
 	int panictrace_glibc;

src/end.c

@@ -207,13 +207,16 @@ NH_panictrace_glibc(){
 }
 
 # ifdef PANICTRACE_GDB
-/* I'm going to assume /bin/grep is the right path for grep. */
 #  ifdef SYSCF
 #   define GDBPATH sysopt.gdbpath
+#   define GREPPATH sysopt.greppath
 #  else
 #   ifndef GDBPATH
 #    define GDBPATH "/usr/bin/gdb"
 #   endif
+#   ifndef GREPPATH
+#    define GREPPATH "/bin/grep"
+#   endif
 #  endif /* !SYSCF */
 # endif  /* PANICTRACE_GDB */
 
@@ -223,12 +226,14 @@ NH_panictrace_gdb(){
 	/* A (more) generic method to get a stack trace - invoke
 	 * gdb on ourself. */
 	char *gdbpath = GDBPATH;
+	char *greppath = GREPPATH;
 	char buf[BUFSZ];
 
 	if(gdbpath == NULL || gdbpath[0] == 0) return FALSE;
+	if(greppath == NULL || greppath[0] == 0) return FALSE;
 
-	sprintf(buf, "%s -n -q %s %d 2>&1 | /bin/grep '^#'",
-			GDBPATH, ARGV0, getpid());
+	sprintf(buf, "%s -n -q %s %d 2>&1 | %s '^#'",
+			gdbpath, ARGV0, getpid(), greppath);
 	FILE *gdb = popen(buf, "w");
 	if(gdb){
 		raw_print("Generating more information you may report:\n");

src/files.c

@@ -2119,6 +2119,7 @@ int		src;
 		return 0;
 	    }
 	    sysopt.pointsmin = temp;
+#ifdef PANICTRACE_GLIBC
 	} else if ( (src==SET_IN_SYS) && match_varname(buf, "PANICTRACE_GLIBC", 16)) {
 	    int temp = atoi(bufp);
 	    if(temp < 1 || temp > 2){
@@ -2126,6 +2127,7 @@ int		src;
 		return 0;
 	    }
 	    sysopt.panictrace_glibc = temp;
+#endif
 	} else if ( (src==SET_IN_SYS) && match_varname(buf, "PANICTRACE_GDB", 14)) {
 	    int temp = atoi(bufp);
 	    if(temp < 1 || temp > 2){
@@ -2137,6 +2139,10 @@ int		src;
 	    if(sysopt.gdbpath) free(sysopt.gdbpath);
 	    sysopt.gdbpath = (char*)alloc(strlen(bufp)+1);
 	    Strcpy(sysopt.gdbpath, bufp);
+	} else if ( (src==SET_IN_SYS) && match_varname(buf, "GREPPATH", 7)) {
+	    if(sysopt.greppath) free(sysopt.greppath);
+	    sysopt.greppath = (char*)alloc(strlen(bufp)+1);
+	    Strcpy(sysopt.greppath, bufp);
 #endif
 	} else if (match_varname(buf, "BOULDER", 3)) {
 	    (void) get_uchars(fp, buf, bufp, &iflags.bouldersym, TRUE,

src/sys.c

@@ -34,6 +34,7 @@ sys_early_init(){
 #ifdef PANICTRACE
 		/* panic options */
 	sysopt.gdbpath = NULL;
+	sysopt.greppath = NULL;
 # ifdef BETA
 	sysopt.panictrace_gdb = 1;
 #  ifdef PANICTRACE_GLIBC

sys/unix/hints/macosx10.5

@@ -64,6 +64,8 @@ CFLAGS=-g -I../include
 CFLAGS+=-DNOCLIPPING -DNOMAIL -DNOTPARMDECL -DHACKDIR=\"$(HACKDIR)\"
 CFLAGS+= -DDEFAULT_WINDOW_SYS=\"$(WANT_DEFAULT)\" -DDLB
 
+CFLAGS+= -DGREPPATH=\"/usr/bin/grep\"
+
 ifdef WANT_WIN_TTY
 WINSRC = $(WINTTYSRC)
 WINOBJ = $(WINTTYOBJ)

sys/unix/sysconf

@@ -42,6 +42,7 @@ MAXPLAYERS=10
 # certain compilation options.  See src/end.c and sys/unix/hints/* for
 # more information.
 GDBPATH=/usr/bin/gdb
+GREPPATH=/bin/grep
 # Values are priorities: 0 - do not use this method, 1 - low priority,
 # 2 - high priority.  Non-zero priority methods are tried in order.
 PANICTRACE_GDB=1