X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=blobdiff_plain;f=src%2Fbootchart%2Fbootchart.c;h=fc00b4e3f2df888fa1fcf27ffeff770d29f0375d;hb=c358d728e7d6bf38a0176a9d5d013c6e972cddbf;hp=0ae72c29bbb1571268343f1728a7c0d5995ed940;hpb=799a8f39d8eb9ea725e85a598c0f5dbd658c8ba7;p=elogind.git

diff --git a/src/bootchart/bootchart.c b/src/bootchart/bootchart.c
index 0ae72c29b..fc00b4e3f 100644
--- a/src/bootchart/bootchart.c
+++ b/src/bootchart/bootchart.c
@@ -310,6 +310,7 @@ int main(int argc, char *argv[]) {
         time_t t = 0;
         int r;
         struct rlimit rlim;
+        bool has_procfs = false;
 
         parse_conf();
 
@@ -349,6 +350,8 @@ int main(int argc, char *argv[]) {
 
         log_uptime();
 
+        has_procfs = access("/proc/vmstat", F_OK) == 0;
+
         LIST_HEAD_INIT(head);
 
         /* main program loop */
@@ -385,11 +388,11 @@ int main(int argc, char *argv[]) {
                                 parse_env_file("/usr/lib/os-release", NEWLINE, "PRETTY_NAME", &build, NULL);
                 }
 
-                /* wait for /proc to become available, discarding samples */
-                if (graph_start <= 0.0)
-                        log_uptime();
-                else
+                if (has_procfs)
                         log_sample(samples, &sampledata);
+                else
+                        /* wait for /proc to become available, discarding samples */
+                        has_procfs = access("/proc/vmstat", F_OK) == 0;
 
                 sample_stop = gettime_ns();