Merge branch 'collectd-4.9' into collectd-4.10

[collectd.git] / src / processes.c

diff --git a/src/processes.c b/src/processes.c
index 8853660..30798d4 100644 (file)
--- a/src/processes.c
+++ b/src/processes.c
@@ -6,6 +6,7 @@
  * Copyright (C) 2009       Sebastian Harl
  * Copyright (C) 2009       Andrés J. Díaz
  * Copyright (C) 2009       Manuel Sanmartin
+ * Copyright (C) 2010       Clément Stenac
  *
  * This program is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License as published by the
@@ -28,6 +29,7 @@
  *   Sebastian Harl <sh at tokkee.org>
  *   Andrés J. Díaz <ajdiaz at connectical.com>
  *   Manuel Sanmartin
+ *   Clément Stenac <clement.stenac at diwi.org>
  **/
 
 #include "collectd.h"
@@ -119,8 +121,6 @@
 #  define ARG_MAX 4096
 #endif
 
-#define BUFSIZE 256
-
 static const char *config_keys[] =
 {
        "Process",
@@ -759,15 +759,16 @@ static procstat_t *ps_read_vmem (int pid, procstat_t *ps)
        if ((fh = fopen (filename, "r")) == NULL)
                return (NULL);
 
-       while (fgets (buffer, 1024, fh) != NULL)
+       while (fgets (buffer, sizeof(buffer), fh) != NULL)
        {
                long long tmp;
                char *endptr;
 
-               if (strncasecmp (buffer, "Vm", 2) != 0)
+               if (strncmp (buffer, "Vm", 2) != 0)
                        continue;
 
-               numfields = strsplit (buffer, fields, 8);
+               numfields = strsplit (buffer, fields,
+                                      STATIC_ARRAY_SIZE (fields));
 
                if (numfields < 2)
                        continue;
@@ -818,7 +819,7 @@ static procstat_t *ps_read_io (int pid, procstat_t *ps)
        if ((fh = fopen (filename, "r")) == NULL)
                return (NULL);
 
-       while (fgets (buffer, 1024, fh) != NULL)
+       while (fgets (buffer, sizeof (buffer), fh) != NULL)
        {
                derive_t *val = NULL;
                long long tmp;
@@ -835,7 +836,8 @@ static procstat_t *ps_read_io (int pid, procstat_t *ps)
                else
                        continue;
 
-               numfields = strsplit (buffer, fields, 8);
+               numfields = strsplit (buffer, fields,
+                               STATIC_ARRAY_SIZE (fields));
 
                if (numfields < 2)
                        continue;
@@ -887,7 +889,7 @@ int ps_read_process (int pid, procstat_t *ps, char *state)
                return (-1);
        buffer[i] = 0;
 
-       fields_len = strsplit (buffer, fields, 64);
+       fields_len = strsplit (buffer, fields, STATIC_ARRAY_SIZE (fields));
        if (fields_len < 24)
        {
                DEBUG ("processes plugin: ps_read_process (pid = %i):"
@@ -997,13 +999,18 @@ static char *ps_get_cmdline (pid_t pid, char *name, char *buf, size_t buf_len)
        if ((pid < 1) || (NULL == buf) || (buf_len < 2))
                return NULL;
 
-       ssnprintf (file, sizeof (file), "/proc/%u/cmdline", pid);
+       ssnprintf (file, sizeof (file), "/proc/%u/cmdline",
+                       (unsigned int) pid);
 
+       errno = 0;
        fd = open (file, O_RDONLY);
        if (fd < 0) {
                char errbuf[4096];
-               WARNING ("processes plugin: Failed to open `%s': %s.", file,
-                               sstrerror (errno, errbuf, sizeof (errbuf)));
+               /* ENOENT means the process exited while we were handling it.
+                * Don't complain about this, it only fills the logs. */
+               if (errno != ENOENT)
+                       WARNING ("processes plugin: Failed to open `%s': %s.", file,
+                                       sstrerror (errno, errbuf, sizeof (errbuf)));
                return NULL;
        }
 
@@ -1018,7 +1025,7 @@ static char *ps_get_cmdline (pid_t pid, char *name, char *buf, size_t buf_len)
                status = read (fd, (void *)buf_ptr, len);
 
                if (status < 0) {
-                       char errbuf[4096];
+                       char errbuf[1024];
 
                        if ((EAGAIN == errno) || (EINTR == errno))
                                continue;
@@ -1103,7 +1110,7 @@ static unsigned long read_fork_rate ()
 
                errno = 0;
                endptr = NULL;
-               result = strtoul(fields[1], &endptr, 10);
+               result = strtoul(fields[1], &endptr, /* base = */ 10);
                if ((endptr == fields[1]) || (errno != 0)) {
                        ERROR ("processes plugin: Cannot parse fork rate: %s",
                                        fields[1]);
@@ -1795,6 +1802,11 @@ static int ps_read (void)
                        pse.vmem_code = 0;
                        pse.stack_size =  0;
 
+                       pse.io_rchar = -1;
+                       pse.io_wchar = -1;
+                       pse.io_syscr = -1;
+                       pse.io_syscw = -1;
+
                        ps_list_add (cmdline, cargs, &pse);
                } /* for (i = 0 .. nprocs) */