ui/ncurses: Use tty name in default log filename

[petitboot] / ui / ncurses / generic-main.c

diff --git a/ui/ncurses/generic-main.c b/ui/ncurses/generic-main.c
index 2cfb9c319f634d2570662b350d3ef598e8a9056c..ad4c0cf9b8f3a1067591482912e648cd4c94d623 100644 (file)
--- a/ui/ncurses/generic-main.c
+++ b/ui/ncurses/generic-main.c
@@ -28,6 +28,7 @@
 #include <signal.h>
 #include <stdlib.h>
 #include <string.h>
+#include <limits.h>
 #include <sys/time.h>
 
 #include "log/log.h"
@@ -82,9 +83,7 @@ static int opts_parse(struct opts *opts, int argc, char *argv[])
                { NULL,          0,                 NULL, 0},
        };
        static const char short_options[] = "dhl:sV";
-       static const struct opts default_values = {
-               .log_file = "/var/log/petitboot/petitboot-nc.log",
-       };
+       static const struct opts default_values = { 0 };
 
        *opts = default_values;
 
@@ -117,6 +116,31 @@ static int opts_parse(struct opts *opts, int argc, char *argv[])
        return 0;
 }
 
+static char *default_log_filename(void)
+{
+       const char *base = "/var/log/petitboot/petitboot-nc";
+       static char name[PATH_MAX];
+       char *tty;
+       int i;
+
+       tty = ttyname(STDIN_FILENO);
+
+       /* strip /dev/ */
+       if (tty && !strncmp(tty, "/dev/", 5))
+               tty += 5;
+
+       /* change slashes to hyphens */
+       for (i = 0; tty && tty[i]; i++)
+               if (tty[i] == '/')
+                       tty[i] = '-';
+
+       if (!tty || !*tty)
+               tty = "unknown";
+
+       snprintf(name, sizeof(name), "%s.%s.log", base, tty);
+
+       return name;
+}
 /**
  * struct pb_cui - Main cui program instance.
  * @mm: Main menu.
@@ -235,6 +259,7 @@ static void sig_handler(int signum)
 int main(int argc, char *argv[])
 {
        static struct sigaction sa;
+       const char *log_filename;
        int result;
        int cui_result;
        struct opts opts;
@@ -257,9 +282,14 @@ int main(int argc, char *argv[])
                return EXIT_SUCCESS;
        }
 
+       if (opts.log_file)
+               log_filename = opts.log_file;
+       else
+               log_filename = default_log_filename();
+
        log = stderr;
-       if (strcmp(opts.log_file, "-")) {
-               log = fopen(opts.log_file, "a");
+       if (strcmp(log_filename, "-")) {
+               log = fopen(log_filename, "a");
 
                if (!log)
                        log = fopen("/dev/null", "a");