1 files changed, 119 insertions, 0 deletions
diff --git a/lib/Utils/logging.cpp b/lib/Utils/logging.cpp
new file mode 100644
index 0000000..15104b8
--- /dev/null
+++ b/lib/Utils/logging.cpp
@@ -0,0 +1,119 @@
+/*
+ * Utility routines.
+ *
+ * Licensed under GPLv2, see file COPYING in this tarball for details.
+ */
+#include "abrtlib.h"
+#include <syslog.h>
+
+int xfunc_error_retval = EXIT_FAILURE;
+
+void xfunc_die(void)
+{
+	exit(xfunc_error_retval);
+}
+
+const char *msg_prefix = "";
+const char *msg_eol = "\n";
+int logmode = LOGMODE_STDIO;
+
+void verror_msg(const char *s, va_list p, const char* strerr)
+{
+	char *msg;
+	int prefix_len, strerr_len, msgeol_len, used;
+
+	if (!logmode)
+		return;
+
+	if (!s) /* nomsg[_and_die] uses NULL fmt */
+		s = ""; /* some libc don't like printf(NULL) */
+
+	used = vasprintf(&msg, s, p);
+	if (used < 0)
+		return;
+
+	/* This is ugly and costs +60 bytes compared to multiple
+	 * fprintf's, but is guaranteed to do a single write.
+	 * This is needed for e.g. when multiple children
+	 * can produce log messages simultaneously. */
+
+	prefix_len = strlen(msg_prefix);
+	strerr_len = strerr ? strlen(strerr) : 0;
+	msgeol_len = strlen(msg_eol);
+	/* +3 is for ": " before strerr and for terminating NUL */
+	msg = (char*) xrealloc(msg, prefix_len + used + strerr_len + msgeol_len + 3);
+	/* TODO: maybe use writev instead of memmoving? Need full_writev? */
+	if (prefix_len) {
+		memmove(msg + prefix_len, msg, used);
+		used += prefix_len;
+		strcpy(msg, msg_prefix);
+	}
+	if (strerr) {
+		if (s[0]) { /* not perror_nomsg? */
+			msg[used++] = ':';
+			msg[used++] = ' ';
+		}
+		strcpy(&msg[used], strerr);
+		used += strerr_len;
+	}
+	strcpy(&msg[used], msg_eol);
+
+	if (logmode & LOGMODE_STDIO) {
+		fflush(stdout);
+		full_write(STDERR_FILENO, msg, used + msgeol_len);
+	}
+	if (logmode & LOGMODE_SYSLOG) {
+		syslog(LOG_ERR, "%s", msg + prefix_len);
+	}
+	free(msg);
+}
+
+void error_msg_and_die(const char *s, ...)
+{
+	va_list p;
+
+	va_start(p, s);
+	verror_msg(s, p, NULL);
+	va_end(p);
+	xfunc_die();
+}
+
+void error_msg(const char *s, ...)
+{
+	va_list p;
+
+	va_start(p, s);
+	verror_msg(s, p, NULL);
+	va_end(p);
+}
+
+void perror_msg_and_die(const char *s, ...)
+{
+	va_list p;
+
+	va_start(p, s);
+	/* Guard against "<error message>: Success" */
+	verror_msg(s, p, errno ? strerror(errno) : NULL);
+	va_end(p);
+	xfunc_die();
+}
+
+void perror_msg(const char *s, ...)
+{
+	va_list p;
+
+	va_start(p, s);
+	/* Guard against "<error message>: Success" */
+	verror_msg(s, p, errno ? strerror(errno) : NULL);
+	va_end(p);
+}
+
+void simple_perror_msg_and_die(const char *s)
+{
+	perror_msg_and_die("%s", s);
+}
+
+void simple_perror_msg(const char *s)
+{
+	perror_msg("%s", s);
+}