prevent apps.plugin errors when files are not found

diff --git a/src/apps_plugin.c b/src/apps_plugin.c
index 92861c664ac0415778dc27e8268001e62c606f28..6b43216cb71a23b0b466e4f215109c20dd56555c 100644 (file)
--- a/src/apps_plugin.c
+++ b/src/apps_plugin.c
@@ -1654,7 +1654,10 @@ void collect_data_for_pid(pid_t pid) {
        // /proc/<pid>/stat
 
        if(unlikely(read_proc_pid_stat(p))) {
-               error("Cannot process %s/proc/%d/stat (command '%s')", host_prefix, pid, p->comm);
+               if(errno != ENOENT || debug)
+                       error("Cannot process %s/proc/%d/stat (command '%s')", host_prefix, pid, p->comm);
+               else
+                       errno = 0;
                // there is no reason to proceed if we cannot get its status
                return;
        }
@@ -1670,14 +1673,21 @@ void collect_data_for_pid(pid_t pid) {
        // --------------------------------------------------------------------
        // /proc/<pid>/io
 
-       if(unlikely(read_proc_pid_io(p)))
-               error("Cannot process %s/proc/%d/io (command '%s')", host_prefix, pid, p->comm);
+       if(unlikely(read_proc_pid_io(p))) {
+               if(errno != ENOENT || debug)
+                       error("Cannot process %s/proc/%d/io (command '%s')", host_prefix, pid, p->comm);
+               else
+                       errno = 0;
+       }
 
        // --------------------------------------------------------------------
        // /proc/<pid>/statm
 
        if(unlikely(read_proc_pid_statm(p))) {
-               error("Cannot process %s/proc/%d/statm (command '%s')", host_prefix, pid, p->comm);
+               if(errno != ENOENT || debug)
+                       error("Cannot process %s/proc/%d/statm (command '%s')", host_prefix, pid, p->comm);
+               else
+                       errno = 0;
                // there is no reason to proceed if we cannot get its memory status
                return;
        }
@@ -1690,8 +1700,12 @@ void collect_data_for_pid(pid_t pid) {
        if(unlikely(p->new_entry)) {
                // /proc/<pid>/cmdline
                if(likely(proc_pid_cmdline_is_needed)) {
-                       if(unlikely(read_proc_pid_cmdline(p)))
-                               error("Cannot process %s/proc/%d/cmdline (command '%s')", host_prefix, pid, p->comm);
+                       if(unlikely(read_proc_pid_cmdline(p))) {
+                               if(errno != ENOENT || debug)
+                                       error("Cannot process %s/proc/%d/cmdline (command '%s')", host_prefix, pid, p->comm);
+                               else
+                                       errno = 0;
+                       }
                }
 
                if(unlikely(debug))
@@ -1729,7 +1743,10 @@ void collect_data_for_pid(pid_t pid) {
        // /proc/<pid>/fd
 
        if(unlikely(read_pid_file_descriptors(p))) {
-               error("Cannot process entries in %s/proc/%d/fd (command '%s')", host_prefix, pid, p->comm);
+               if(errno != ENOENT || debug)
+                       error("Cannot process entries in %s/proc/%d/fd (command '%s')", host_prefix, pid, p->comm);
+               else
+                       errno = 0;
        }
 
        // --------------------------------------------------------------------