Log to /var/log/apk.log

This adds a log file at /var/log/apk.log. On each run, apk's version
information and the current date & time are written to this file,
followed by any normal apk output.

1 files changed, 6 insertions, 1 deletions

diff --git a/src/apk_print.h b/src/apk_print.h
index ec766ed..132fd8c 100644
--- a/src/apk_print.h
+++ b/src/apk_print.h
@@ -30,11 +30,15 @@ void apk_url_parse(struct apk_url_print *, const char *);
 struct apk_out {
 	int verbosity;
 	unsigned int width, last_change;
-	FILE *out, *err;
+	FILE *out, *err, *log;
 };
 
 static inline int apk_out_verbosity(struct apk_out *out) { return out->verbosity; }
 
+// Pass this as the prefix to skip logging to the console (but still write to
+// the log file).
+#define APK_OUT_LOG_ONLY ((const char*)-1)
+
 #define apk_err(out, args...)	do { apk_out_fmt(out, "ERROR: ", args); } while (0)
 #define apk_out(out, args...)	do { apk_out_fmt(out, NULL, args); } while (0)
 #define apk_warn(out, args...)	do { if (apk_out_verbosity(out) >= 0) { apk_out_fmt(out, "WARNING: ", args); } } while (0)
@@ -44,6 +48,7 @@ static inline int apk_out_verbosity(struct apk_out *out) { return out->verbosity
 
 void apk_out_reset(struct apk_out *);
 void apk_out_fmt(struct apk_out *, const char *prefix, const char *format, ...);
+void apk_out_log_argv(struct apk_out *, char **argv);
 
 struct apk_progress {
 	struct apk_out *out;