1 files changed, 97 insertions, 0 deletions
diff --git a/utils.c b/utils.c
new file mode 100644
index 0000000..5b56928
--- /dev/null
+++ b/utils.c
@@ -0,0 +1,97 @@
+/*
+ * Copyright by Marco d'Itri <md@linux.it>.
+ *
+ * do_nofail and merge_args come from the module-init-tools package.
+ * Copyright by Rusty Russell.
+ * Copyright by Rusty Russell, IBM Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+/* for strdup */
+#define _XOPEN_SOURCE 500
+
+/* System library */
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdarg.h>
+#include <string.h>
+#include <errno.h>
+
+/* Application-specific */
+#include "utils.h"
+
+void *do_nofail(void *ptr, const char *file, const int line)
+{
+    if (ptr)
+	return ptr;
+
+    err_quit("Memory allocation failure at %s:%d.", file, line);
+}
+
+/* Prepend options from a string. */
+char **merge_args(char *args, char *argv[], int *argc)
+{
+    char *arg, *argstring;
+    char **newargs = NULL;
+    int i;
+    unsigned int num_env = 0;
+
+    if (!args)
+	return argv;
+
+    argstring = NOFAIL(strdup(args));
+    for (arg = strtok(argstring, " "); arg; arg = strtok(NULL, " ")) {
+	num_env++;
+	newargs = NOFAIL(realloc(newargs,
+		    sizeof(newargs[0]) * (num_env + *argc + 1)));
+	newargs[num_env] = arg;
+    }
+
+    if (!newargs)
+	return argv;
+
+    /* Append commandline args */
+    newargs[0] = argv[0];
+    for (i = 1; i <= *argc; i++)
+	newargs[num_env + i] = argv[i];
+
+    *argc += num_env;
+    return newargs;
+}
+
+/* Error routines */
+void NORETURN err_sys(const char *fmt, ...)
+{
+    va_list ap;
+
+    va_start(ap, fmt);
+    vfprintf(stderr, fmt, ap);
+    fprintf(stderr, ": %s\n", strerror(errno));
+    va_end(ap);
+    exit(2);
+}
+
+void NORETURN err_quit(const char *fmt, ...)
+{
+    va_list ap;
+
+    va_start(ap, fmt);
+    vfprintf(stderr, fmt, ap);
+    fputs("\n", stderr);
+    va_end(ap);
+    exit(2);
+}
+