bootchart: various superficial cleanups

Let's update bootchar to share the coding style a bit more with the rest
of the package.

- Some tabs/spaces fixes

- add #pragma to header

- split up header so that we have a 1:1 relation between .c and .h files
  like everywhere else

- Prefix user command line arguments/configuration settings with "arg_".

- other coding style fixes

6 files changed, 242 insertions, 215 deletions

diff --git a/src/bootchart/bootchart.c b/src/bootchart/bootchart.c
index 65f16c517c..a722b2aabf 100644
--- a/src/bootchart/bootchart.c
+++ b/src/bootchart/bootchart.c
@@ -1,5 +1,7 @@
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
 /***
-  bootchart.c - This file is part of systemd-bootchart
+  This file is part of systemd.
 
   Copyright (C) 2009-2013 Intel Coproration
 
@@ -47,14 +49,15 @@
 #include <fcntl.h>
 #include <stdbool.h>
 
-
-#include "bootchart.h"
 #include "util.h"
 #include "fileio.h"
 #include "macro.h"
 #include "conf-parser.h"
 #include "strxcpyx.h"
 #include "path-util.h"
+#include "store.h"
+#include "svg.h"
+#include "bootchart.h"
 
 double graph_start;
 double log_start;
@@ -72,33 +75,30 @@ static int exiting = 0;
 int sysfd=-1;
 
 /* graph defaults */
-bool entropy = false;
+bool arg_entropy = false;
 bool initcall = true;
-bool relative = false;
-bool filter = true;
-bool show_cmdline = false;
-bool pss = false;
+bool arg_relative = false;
+bool arg_filter = true;
+bool arg_show_cmdline = false;
+bool arg_pss = false;
 int samples;
-int samples_len = 500; /* we record len+1 (1 start sample) */
-double hz = 25.0;   /* 20 seconds log time */
-double scale_x = 100.0; /* 100px = 1sec */
-double scale_y = 20.0;  /* 16px = 1 process bar */
+int arg_samples_len = 500; /* we record len+1 (1 start sample) */
+double arg_hz = 25.0;   /* 20 seconds log time */
+double arg_scale_x = 100.0; /* 100px = 1sec */
+double arg_scale_y = 20.0;  /* 16px = 1 process bar */
 
-char init_path[PATH_MAX] = "/sbin/init";
-char output_path[PATH_MAX] = "/run/log";
+char arg_init_path[PATH_MAX] = "/sbin/init";
+char arg_output_path[PATH_MAX] = "/run/log";
 
 static struct rlimit rlim;
 
-static void signal_handler(int sig)
-{
+static void signal_handler(int sig) {
         if (sig++)
                 sig--;
         exiting = 1;
 }
 
-
-int main(int argc, char *argv[])
-{
+int main(int argc, char *argv[]) {
         _cleanup_free_ char *build = NULL;
         struct sigaction sig;
         struct ps_struct *ps;
@@ -112,16 +112,16 @@ int main(int argc, char *argv[])
         char *init = NULL, *output = NULL;
 
         const ConfigTableItem items[] = {
-                { "Bootchart", "Samples",          config_parse_int,    0, &samples_len },
-                { "Bootchart", "Frequency",        config_parse_double, 0, &hz          },
-                { "Bootchart", "Relative",         config_parse_bool,   0, &relative    },
-                { "Bootchart", "Filter",           config_parse_bool,   0, &filter      },
-                { "Bootchart", "Output",           config_parse_path,   0, &output      },
-                { "Bootchart", "Init",             config_parse_path,   0, &init        },
-                { "Bootchart", "PlotMemoryUsage",  config_parse_bool,   0, &pss         },
-                { "Bootchart", "PlotEntropyGraph", config_parse_bool,   0, &entropy     },
-                { "Bootchart", "ScaleX",           config_parse_double, 0, &scale_x     },
-                { "Bootchart", "ScaleY",           config_parse_double, 0, &scale_y     },
+                { "Bootchart", "Samples",          config_parse_int,    0, &arg_samples_len },
+                { "Bootchart", "Frequency",        config_parse_double, 0, &arg_hz          },
+                { "Bootchart", "Relative",         config_parse_bool,   0, &arg_relative    },
+                { "Bootchart", "Filter",           config_parse_bool,   0, &arg_filter      },
+                { "Bootchart", "Output",           config_parse_path,   0, &output          },
+                { "Bootchart", "Init",             config_parse_path,   0, &init            },
+                { "Bootchart", "PlotMemoryUsage",  config_parse_bool,   0, &arg_pss         },
+                { "Bootchart", "PlotEntropyGraph", config_parse_bool,   0, &arg_entropy     },
+                { "Bootchart", "ScaleX",           config_parse_double, 0, &arg_scale_x     },
+                { "Bootchart", "ScaleY",           config_parse_double, 0, &arg_scale_y     },
                 { NULL, NULL, NULL, 0, NULL }
         };
 
@@ -137,9 +137,9 @@ int main(int argc, char *argv[])
                     log_warning("Failed to parse configuration file: %s", strerror(-r));
 
             if (init != NULL)
-                    strscpy(init_path, sizeof(init_path), init);
+                    strscpy(arg_init_path, sizeof(arg_init_path), init);
             if (output != NULL)
-                    strscpy(output_path, sizeof(output_path), output);
+                    strscpy(arg_output_path, sizeof(arg_output_path), output);
         }
 
         while (1) {
@@ -166,63 +166,63 @@ int main(int argc, char *argv[])
                         break;
                 switch (i) {
                 case 'r':
-                        relative = true;
+                        arg_relative = true;
                         break;
                 case 'f':
-                        r = safe_atod(optarg, &hz);
+                        r = safe_atod(optarg, &arg_hz);
                         if (r < 0)
                                 log_warning("failed to parse --freq/-f argument '%s': %s",
                                             optarg, strerror(-r));
                         break;
                 case 'F':
-                        filter = false;
+                        arg_filter = false;
                         break;
                 case 'C':
-                        show_cmdline = true;
+                        arg_show_cmdline = true;
                         break;
                 case 'n':
-                        r = safe_atoi(optarg, &samples_len);
+                        r = safe_atoi(optarg, &arg_samples_len);
                         if (r < 0)
                                 log_warning("failed to parse --samples/-n argument '%s': %s",
                                             optarg, strerror(-r));
                         break;
                 case 'o':
                         path_kill_slashes(optarg);
-                        strscpy(output_path, sizeof(output_path), optarg);
+                        strscpy(arg_output_path, sizeof(arg_output_path), optarg);
                         break;
                 case 'i':
                         path_kill_slashes(optarg);
-                        strscpy(init_path, sizeof(init_path), optarg);
+                        strscpy(arg_init_path, sizeof(arg_init_path), optarg);
                         break;
                 case 'p':
-                        pss = true;
+                        arg_pss = true;
                         break;
                 case 'x':
-                        r = safe_atod(optarg, &scale_x);
+                        r = safe_atod(optarg, &arg_scale_x);
                         if (r < 0)
                                 log_warning("failed to parse --scale-x/-x argument '%s': %s",
                                             optarg, strerror(-r));
                         break;
                 case 'y':
-                        r = safe_atod(optarg, &scale_y);
+                        r = safe_atod(optarg, &arg_scale_y);
                         if (r < 0)
                                 log_warning("failed to parse --scale-y/-y argument '%s': %s",
                                             optarg, strerror(-r));
                         break;
                 case 'e':
-                        entropy = true;
+                        arg_entropy = true;
                         break;
                 case 'h':
                         fprintf(stderr, "Usage: %s [OPTIONS]\n", argv[0]);
                         fprintf(stderr, " --rel,       -r          Record time relative to recording\n");
-                        fprintf(stderr, " --freq,      -f f        Sample frequency [%f]\n", hz);
-                        fprintf(stderr, " --samples,   -n N        Stop sampling at [%d] samples\n", samples_len);
-                        fprintf(stderr, " --scale-x,   -x N        Scale the graph horizontally [%f] \n", scale_x);
-                        fprintf(stderr, " --scale-y,   -y N        Scale the graph vertically [%f] \n", scale_y);
+                        fprintf(stderr, " --freq,      -f f        Sample frequency [%f]\n", arg_hz);
+                        fprintf(stderr, " --samples,   -n N        Stop sampling at [%d] samples\n", arg_samples_len);
+                        fprintf(stderr, " --scale-x,   -x N        Scale the graph horizontally [%f] \n", arg_scale_x);
+                        fprintf(stderr, " --scale-y,   -y N        Scale the graph vertically [%f] \n", arg_scale_y);
                         fprintf(stderr, " --pss,       -p          Enable PSS graph (CPU intensive)\n");
                         fprintf(stderr, " --entropy,   -e          Enable the entropy_avail graph\n");
-                        fprintf(stderr, " --output,    -o [PATH]   Path to output files [%s]\n", output_path);
-                        fprintf(stderr, " --init,      -i [PATH]   Path to init executable [%s]\n", init_path);
+                        fprintf(stderr, " --output,    -o [PATH]   Path to output files [%s]\n", arg_output_path);
+                        fprintf(stderr, " --init,      -i [PATH]   Path to init executable [%s]\n", arg_init_path);
                         fprintf(stderr, " --no-filter, -F          Disable filtering of processes from the graph\n");
                         fprintf(stderr, "                          that are of less importance or short-lived\n");
                         fprintf(stderr, " --cmdline,   -C          Display the full command line with arguments\n");
@@ -236,12 +236,12 @@ int main(int argc, char *argv[])
                 }
         }
 
-        if (samples_len > MAXSAMPLES) {
+        if (arg_samples_len > MAXSAMPLES) {
                 fprintf(stderr, "Error: samples exceeds maximum\n");
                 exit(EXIT_FAILURE);
         }
 
-        if (hz <= 0.0) {
+        if (arg_hz <= 0.0) {
                 fprintf(stderr, "Error: Frequency needs to be > 0\n");
                 exit(EXIT_FAILURE);
         }
@@ -255,7 +255,7 @@ int main(int argc, char *argv[])
         if (getpid() == 1) {
                 if (fork()) {
                         /* parent */
-                        execl(init_path, init_path, NULL);
+                        execl(arg_init_path, arg_init_path, NULL);
                 }
         }
         argv[0][0] = '@';
@@ -272,7 +272,7 @@ int main(int argc, char *argv[])
         sig.sa_handler = signal_handler;
         sigaction(SIGHUP, &sig, NULL);
 
-        interval = (1.0 / hz) * 1000000000.0;
+        interval = (1.0 / arg_hz) * 1000000000.0;
 
         log_uptime();
 
@@ -288,22 +288,20 @@ int main(int argc, char *argv[])
 
                 sampletime[samples] = gettime_ns();
 
-                if (!of && (access(output_path, R_OK|W_OK|X_OK) == 0)) {
+                if (!of && (access(arg_output_path, R_OK|W_OK|X_OK) == 0)) {
                         t = time(NULL);
                         strftime(datestr, sizeof(datestr), "%Y%m%d-%H%M", localtime(&t));
-                        snprintf(output_file, PATH_MAX, "%s/bootchart-%s.svg", output_path, datestr);
+                        snprintf(output_file, PATH_MAX, "%s/bootchart-%s.svg", arg_output_path, datestr);
                         of = fopen(output_file, "w");
                 }
 
-                if (sysfd < 0) {
+                if (sysfd < 0)
                         sysfd = open("/sys", O_RDONLY);
-                }
 
-                if (!build) {
+                if (!build)
                         parse_env_file("/etc/os-release", NEWLINE,
                                        "PRETTY_NAME", &build,
                                        NULL);
-                }
 
                 /* wait for /proc to become available, discarding samples */
                 if (!(graph_start > 0.0))
@@ -341,12 +339,12 @@ int main(int argc, char *argv[])
                 } else {
                         overrun++;
                         /* calculate how many samples we lost and scrap them */
-                        samples_len = samples_len + ((int)(newint_ns / interval));
+                        arg_samples_len = arg_samples_len + ((int)(newint_ns / interval));
                 }
 
                 samples++;
 
-                if (samples > samples_len)
+                if (samples > arg_samples_len)
                         break;
 
         }
@@ -366,7 +364,7 @@ int main(int argc, char *argv[])
         if (!of) {
                 t = time(NULL);
                 strftime(datestr, sizeof(datestr), "%Y%m%d-%H%M", localtime(&t));
-                snprintf(output_file, PATH_MAX, "%s/bootchart-%s.svg", output_path, datestr);
+                snprintf(output_file, PATH_MAX, "%s/bootchart-%s.svg", arg_output_path, datestr);
                 of = fopen(output_file, "w");
         }
 
@@ -378,10 +376,13 @@ int main(int argc, char *argv[])
         svg_do(build);
 
         fprintf(stderr, "systemd-bootchart wrote %s\n", output_file);
-        fclose(of);
+
+        if (of)
+                fclose(of);
 
         closedir(proc);
-        close(sysfd);
+        if (sysfd >= 0)
+                close(sysfd);
 
         /* nitpic cleanups */
         ps = ps_first;
diff --git a/src/bootchart/bootchart.h b/src/bootchart/bootchart.h
index 0fe4d2f4da..a9541caf4a 100644
--- a/src/bootchart/bootchart.h
+++ b/src/bootchart/bootchart.h
@@ -1,5 +1,9 @@
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+#pragma once
+
 /***
-  bootchart.h - This file is part of systemd-bootchart
+  This file is part of systemd.
 
   Copyright (C) 2009-2013 Intel Coproration
 
@@ -18,7 +22,7 @@
 
   You should have received a copy of the GNU Lesser General Public License
   along with systemd; If not, see <http://www.gnu.org/licenses/>.
- ***/
+***/
 
 #include <dirent.h>
 #include <stdbool.h>
@@ -27,7 +31,6 @@
 #define MAXPIDS     65535
 #define MAXSAMPLES   8192
 
-
 struct block_stat_struct {
         /* /proc/vmstat pgpgin & pgpgout */
         int bi;
@@ -99,31 +102,23 @@ extern struct ps_struct *ps_first;
 extern struct block_stat_struct blockstat[];
 extern struct cpu_stat_struct cpustat[];
 extern int pscount;
-extern bool relative;
-extern bool filter;
-extern bool show_cmdline;
-extern bool pss;
-extern bool entropy;
+extern bool arg_relative;
+extern bool arg_filter;
+extern bool arg_show_cmdline;
+extern bool arg_pss;
+extern bool arg_entropy;
 extern bool initcall;
 extern int samples;
 extern int cpus;
-extern int samples_len;
-extern double hz;
-extern double scale_x;
-extern double scale_y;
+extern int arg_samples_len;
+extern double arg_hz;
+extern double arg_scale_x;
+extern double arg_scale_y;
 extern int overrun;
 extern double interval;
 
-extern char output_path[PATH_MAX];
-extern char init_path[PATH_MAX];
+extern char arg_output_path[PATH_MAX];
+extern char arg_init_path[PATH_MAX];
 
 extern FILE *of;
-extern DIR *proc;
-extern int procfd;
 extern int sysfd;
-
-extern double gettime_ns(void);
-extern void log_uptime(void);
-extern void log_sample(int sample);
-
-extern void svg_do(const char *build);
diff --git a/src/bootchart/store.c b/src/bootchart/store.c
index ccec03f12c..0253ebb5af 100644
--- a/src/bootchart/store.c
+++ b/src/bootchart/store.c
@@ -1,5 +1,7 @@
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
 /***
-  log.c - This file is part of systemd-bootchart
+  This file is part of systemd.
 
   Copyright (C) 2009-2013 Intel Coproration
 
@@ -20,7 +22,6 @@
   along with systemd; If not, see <http://www.gnu.org/licenses/>.
  ***/
 
-#define _GNU_SOURCE 1
 #include <unistd.h>
 #include <stdlib.h>
 #include <limits.h>
@@ -32,9 +33,9 @@
 #include <fcntl.h>
 #include <time.h>
 
-
-#include "bootchart.h"
 #include "util.h"
+#include "store.h"
+#include "bootchart.h"
 
 /*
  * Alloc a static 4k buffer for stdio - primarily used to increase
@@ -43,10 +44,9 @@
  */
 static char smaps_buf[4096];
 DIR *proc;
-int procfd=-1;
+int procfd = -1;
 
-double gettime_ns(void)
-{
+double gettime_ns(void) {
         struct timespec n;
 
         clock_gettime(CLOCK_MONOTONIC, &n);
@@ -54,9 +54,7 @@ double gettime_ns(void)
         return (n.tv_sec + (n.tv_nsec / 1000000000.0));
 }
 
-
-void log_uptime(void)
-{
+void log_uptime(void) {
         FILE _cleanup_fclose_ *f = NULL;
         char str[32];
         double uptime;
@@ -73,15 +71,13 @@ void log_uptime(void)
         log_start = gettime_ns();
 
         /* start graph at kernel boot time */
-        if (relative)
+        if (arg_relative)
                 graph_start = log_start;
         else
                 graph_start = log_start - uptime;
 }
 
-
-static char *bufgetline(char *buf)
-{
+static char *bufgetline(char *buf) {
         char *c;
 
         if (!buf)
@@ -94,16 +90,16 @@ static char *bufgetline(char *buf)
 }
 
 static int pid_cmdline_strncpy(char *buffer, int pid, size_t buf_len) {
-	char filename[PATH_MAX];
-	int _cleanup_close_ fd=-1;
-	ssize_t n;
+        char filename[PATH_MAX];
+        int _cleanup_close_ fd=-1;
+        ssize_t n;
 
-	sprintf(filename, "%d/cmdline", pid);
-	fd = openat(procfd, filename, O_RDONLY);
-	if (fd < 0)
-	        return -errno;
+        sprintf(filename, "%d/cmdline", pid);
+        fd = openat(procfd, filename, O_RDONLY);
+        if (fd < 0)
+                return -errno;
 
-	n = read(fd, buffer, buf_len-1);
+        n = read(fd, buffer, buf_len-1);
         if (n > 0) {
                 int i;
                 for (i = 0; i < n; i++)
@@ -111,11 +107,10 @@ static int pid_cmdline_strncpy(char *buffer, int pid, size_t buf_len) {
                                 buffer[i] = ' ';
                 buffer[n] = '\0';
         }
-	return 0;
+        return 0;
 }
 
-void log_sample(int sample)
-{
+void log_sample(int sample) {
         static int vmstat;
         static int schedstat;
         char buf[4095];
@@ -214,7 +209,7 @@ schedstat_next:
                         break;
         }
 
-        if (entropy) {
+        if (arg_entropy) {
                 if (!e_fd) {
                         e_fd = openat(procfd, "sys/kernel/random/entropy_avail", O_RDONLY);
                 }
@@ -262,7 +257,7 @@ schedstat_next:
                         ps = ps->next_ps;
                         ps->pid = pid;
 
-                        ps->sample = calloc(samples_len + 1, sizeof(struct ps_sched_struct));
+                        ps->sample = calloc(arg_samples_len + 1, sizeof(struct ps_sched_struct));
                         if (!ps->sample) {
                                 perror("calloc(ps_struct)");
                                 exit (EXIT_FAILURE);
@@ -294,7 +289,7 @@ schedstat_next:
                         strncpy(ps->name, key, 256);
 
                         /* cmdline */
-                        if (show_cmdline)
+                        if (arg_show_cmdline)
                                 pid_cmdline_strncpy(ps->name, pid, 256);
 
                         /* discard line 2 */
@@ -395,7 +390,7 @@ schedstat_next:
                                  - ps->sample[ps->first].runtime)
                                  / 1000000000.0;
 
-                if (!pss)
+                if (!arg_pss)
                         goto catch_rename;
                 /* Pss */
                 if (!ps->smaps) {
@@ -428,7 +423,7 @@ schedstat_next:
 
 catch_rename:
                 /* catch process rename, try to randomize time */
-                mod = (hz < 4.0) ? 4.0 : (hz / 4.0);
+                mod = (arg_hz < 4.0) ? 4.0 : (arg_hz / 4.0);
                 if (((samples - ps->first) + pid) % (int)(mod) == 0) {
 
                         /* re-fetch name */
@@ -457,7 +452,7 @@ catch_rename:
                         strncpy(ps->name, key, 256);
 
                         /* cmdline */
-                        if (show_cmdline)
+                        if (arg_show_cmdline)
                                 pid_cmdline_strncpy(ps->name, pid, 256);
                 }
         }
diff --git a/src/bootchart/store.h b/src/bootchart/store.h
new file mode 100644
index 0000000000..e8d013cde4
--- /dev/null
+++ b/src/bootchart/store.h
@@ -0,0 +1,34 @@
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+#pragma once
+
+/***
+  This file is part of systemd.
+
+  Copyright (C) 2009-2013 Intel Coproration
+
+  Authors:
+    Auke Kok <auke-jan.h.kok@intel.com>
+
+  systemd is free software; you can redistribute it and/or modify it
+  under the terms of the GNU Lesser General Public License as published by
+  the Free Software Foundation; either version 2.1 of the License, or
+  (at your option) any later version.
+
+  systemd is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <dirent.h>
+
+extern DIR *proc;
+extern int procfd;
+
+double gettime_ns(void);
+void log_uptime(void);
+void log_sample(int sample);
diff --git a/src/bootchart/svg.c b/src/bootchart/svg.c
index 9fee810795..231d3daa80 100644
--- a/src/bootchart/svg.c
+++ b/src/bootchart/svg.c
@@ -1,5 +1,7 @@
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
 /***
-  bootchart.c - This file is part of systemd-bootchart
+  This file is part of systemd.
 
   Copyright (C) 2009-2013 Intel Coproration
 
@@ -31,14 +33,15 @@
 #include <sys/stat.h>
 #include <fcntl.h>
 
-#include "bootchart.h"
 #include "util.h"
 #include "macro.h"
+#include "store.h"
+#include "svg.h"
+#include "bootchart.h"
 
-
-#define time_to_graph(t) ((t) * scale_x)
-#define ps_to_graph(n) ((n) * scale_y)
-#define kb_to_graph(m) ((m) * scale_y * 0.0001)
+#define time_to_graph(t) ((t) * arg_scale_x)
+#define ps_to_graph(n) ((n) * arg_scale_y)
+#define kb_to_graph(m) ((m) * arg_scale_y * 0.0001)
 #define to_color(n) (192.0 - ((n) * 192.0))
 
 #define max(x, y) (((x) > (y)) ? (x) : (y))
@@ -48,7 +51,7 @@ static char str[8092];
 
 #define svg(a...) do { snprintf(str, 8092, ## a); fputs(str, of); fflush(of); } while (0)
 
-static const char *colorwheel[12] = {
+static const char * const colorwheel[12] = {
         "rgb(255,32,32)",  // red
         "rgb(32,192,192)", // cyan
         "rgb(255,128,32)", // orange
@@ -71,9 +74,7 @@ static float psize = 0;
 static float ksize = 0;
 static float esize = 0;
 
-
-static void svg_header(void)
-{
+static void svg_header(void) {
         float w;
         float h;
 
@@ -82,8 +83,8 @@ static void svg_header(void)
         w = ((w < 1600.0) ? 1600.0 : w);
 
         /* height is variable based on pss, psize, ksize */
-        h = 400.0 + (scale_y * 30.0) /* base graphs and title */
-            + (pss ? (100.0 * scale_y) + (scale_y * 7.0) : 0.0) /* pss estimate */
+        h = 400.0 + (arg_scale_y * 30.0) /* base graphs and title */
+            + (arg_pss ? (100.0 * arg_scale_y) + (arg_scale_y * 7.0) : 0.0) /* pss estimate */
             + psize + ksize + esize;
 
         svg("<?xml version=\"1.0\" standalone=\"no\"?>\n");
@@ -103,11 +104,11 @@ static void svg_header(void)
         svg("<!-- your browser to file:///run/log/ and click. This bootchart was      -->\n\n");
 
         svg("<!-- generated by bootchart version %s, running with options:  -->\n", VERSION);
-        svg("<!-- hz=\"%f\" n=\"%d\" -->\n", hz, samples_len);
-        svg("<!-- x=\"%f\" y=\"%f\" -->\n", scale_x, scale_y);
-        svg("<!-- rel=\"%d\" f=\"%d\" -->\n", relative, filter);
-        svg("<!-- p=\"%d\" e=\"%d\" -->\n", pss, entropy);
-        svg("<!-- o=\"%s\" i=\"%s\" -->\n\n", output_path, init_path);
+        svg("<!-- hz=\"%f\" n=\"%d\" -->\n", arg_hz, arg_samples_len);
+        svg("<!-- x=\"%f\" y=\"%f\" -->\n", arg_scale_x, arg_scale_y);
+        svg("<!-- rel=\"%d\" f=\"%d\" -->\n", arg_relative, arg_filter);
+        svg("<!-- p=\"%d\" e=\"%d\" -->\n", arg_pss, arg_entropy);
+        svg("<!-- o=\"%s\" i=\"%s\" -->\n\n", arg_output_path, arg_init_path);
 
         /* style sheet */
         svg("<defs>\n  <style type=\"text/css\">\n    <![CDATA[\n");
@@ -136,12 +137,9 @@ static void svg_header(void)
         svg("      text.idle  { font-size: 18; }\n");
 
         svg("    ]]>\n   </style>\n</defs>\n\n");
-
 }
 
-
-static void svg_title(const char *build)
-{
+static void svg_title(const char *build) {
         char cmdline[256] = "";
         char filename[PATH_MAX];
         char buf[256];
@@ -222,12 +220,10 @@ static void svg_title(const char *build)
                 svg("Not detected");
         svg("</text>\n");
         svg("<text class=\"sec\" x=\"20\" y=\"155\">Graph data: %.03f samples/sec, recorded %i total, dropped %i samples, %i processes, %i filtered</text>\n",
-            hz, samples_len, overrun, pscount, pfiltered);
+            arg_hz, arg_samples_len, overrun, pscount, pfiltered);
 }
 
-
-static void svg_graph_box(int height)
-{
+static void svg_graph_box(int height) {
         double d = 0.0;
         int i = 0;
 
@@ -238,7 +234,7 @@ static void svg_graph_box(int height)
             ps_to_graph(height));
 
         for (d = graph_start; d <= sampletime[samples-1];
-             d += (scale_x < 2.0 ? 60.0 : scale_x < 10.0 ? 1.0 : 0.1)) {
+             d += (arg_scale_x < 2.0 ? 60.0 : arg_scale_x < 10.0 ? 1.0 : 0.1)) {
                 /* lines for each second */
                 if (i % 50 == 0)
                         svg("  <line class=\"sec5\" x1=\"%.03f\" y1=\"0\" x2=\"%.03f\" y2=\"%.03f\" />\n",
@@ -282,8 +278,7 @@ static char* xml_comment_encode(const char* name) {
         return enc_name;
 }
 
-static void svg_pss_graph(void)
-{
+static void svg_pss_graph(void) {
         struct ps_struct *ps;
         int i;
 
@@ -320,7 +315,7 @@ static void svg_pss_graph(void)
                         ps = ps->next_ps;
                         if (!ps)
                                 continue;
-                        if (ps->sample[i].pss <= (100 * scale_y))
+                        if (ps->sample[i].pss <= (100 * arg_scale_y))
                                 top += ps->sample[i].pss;
                 };
                 svg("    <rect class=\"clrw\" style=\"fill: %s\" x=\"%.03f\" y=\"%.03f\" width=\"%.03f\" height=\"%.03f\" />\n",
@@ -339,7 +334,7 @@ static void svg_pss_graph(void)
                         if (!ps)
                                 continue;
                         /* don't draw anything smaller than 2mb */
-                        if (ps->sample[i].pss > (100 * scale_y)) {
+                        if (ps->sample[i].pss > (100 * arg_scale_y)) {
                                 top = bottom + ps->sample[i].pss;
                                 svg("    <rect class=\"clrw\" style=\"fill: %s\" x=\"%.03f\" y=\"%.03f\" width=\"%.03f\" height=\"%.03f\" />\n",
                                     colorwheel[ps->pid % 12],
@@ -366,7 +361,7 @@ static void svg_pss_graph(void)
                         ps = ps->next_ps;
                         if (!ps)
                                 continue;
-                        if (ps->sample[i].pss <= (100 * scale_y))
+                        if (ps->sample[i].pss <= (100 * arg_scale_y))
                                 top += ps->sample[i].pss;
                 };
 
@@ -379,10 +374,10 @@ static void svg_pss_graph(void)
                         if (!ps)
                                 continue;
                         /* don't draw anything smaller than 2mb */
-                        if (ps->sample[i].pss > (100 * scale_y)) {
+                        if (ps->sample[i].pss > (100 * arg_scale_y)) {
                                 top = bottom + ps->sample[i].pss;
                                 /* draw a label with the process / PID */
-                                if ((i == 1) || (ps->sample[i - 1].pss <= (100 * scale_y)))
+                                if ((i == 1) || (ps->sample[i - 1].pss <= (100 * arg_scale_y)))
                                         svg("  <text x=\"%.03f\" y=\"%.03f\"><![CDATA[%s]]> [%i]</text>\n",
                                             time_to_graph(sampletime[i] - graph_start),
                                             kb_to_graph(1000000.0 - bottom - ((top -  bottom) / 2)),
@@ -416,8 +411,7 @@ static void svg_pss_graph(void)
 
 }
 
-static void svg_io_bi_bar(void)
-{
+static void svg_io_bi_bar(void) {
         double max = 0.0;
         double range;
         int max_here = 0;
@@ -434,7 +428,7 @@ static void svg_io_bi_bar(void)
          * each poll. Applying a smoothing function loses some burst data,
          * so keep the smoothing range short.
          */
-        range = 0.25 / (1.0 / hz);
+        range = 0.25 / (1.0 / arg_hz);
         if (range < 2.0)
                 range = 2.0; /* no smoothing */
 
@@ -479,22 +473,21 @@ static void svg_io_bi_bar(void)
                 if (pbi > 0.001)
                         svg("<rect class=\"bi\" x=\"%.03f\" y=\"%.03f\" width=\"%.03f\" height=\"%.03f\" />\n",
                             time_to_graph(sampletime[i - 1] - graph_start),
-                            (scale_y * 5) - (pbi * (scale_y * 5)),
+                            (arg_scale_y * 5) - (pbi * (arg_scale_y * 5)),
                             time_to_graph(sampletime[i] - sampletime[i - 1]),
-                            pbi * (scale_y * 5));
+                            pbi * (arg_scale_y * 5));
 
                 /* labels around highest value */
                 if (i == max_here) {
                         svg("  <text class=\"sec\" x=\"%.03f\" y=\"%.03f\">%0.2fmb/sec</text>\n",
                             time_to_graph(sampletime[i] - graph_start) + 5,
-                            ((scale_y * 5) - (pbi * (scale_y * 5))) + 15,
+                            ((arg_scale_y * 5) - (pbi * (arg_scale_y * 5))) + 15,
                             max / 1024.0 / (interval / 1000000000.0));
                 }
         }
 }
 
-static void svg_io_bo_bar(void)
-{
+static void svg_io_bo_bar(void) {
         double max = 0.0;
         double range;
         int max_here = 0;
@@ -511,7 +504,7 @@ static void svg_io_bo_bar(void)
          * each poll. Applying a smoothing function loses some burst data,
          * so keep the smoothing range short.
          */
-        range = 0.25 / (1.0 / hz);
+        range = 0.25 / (1.0 / arg_hz);
         if (range < 2.0)
                 range = 2.0; /* no smoothing */
 
@@ -556,23 +549,21 @@ static void svg_io_bo_bar(void)
                 if (pbo > 0.001)
                         svg("<rect class=\"bo\" x=\"%.03f\" y=\"%.03f\" width=\"%.03f\" height=\"%.03f\" />\n",
                             time_to_graph(sampletime[i - 1] - graph_start),
-                            (scale_y * 5) - (pbo * (scale_y * 5)),
+                            (arg_scale_y * 5) - (pbo * (arg_scale_y * 5)),
                             time_to_graph(sampletime[i] - sampletime[i - 1]),
-                            pbo * (scale_y * 5));
+                            pbo * (arg_scale_y * 5));
 
                 /* labels around highest bo value */
                 if (i == max_here) {
                         svg("  <text class=\"sec\" x=\"%.03f\" y=\"%.03f\">%0.2fmb/sec</text>\n",
                             time_to_graph(sampletime[i] - graph_start) + 5,
-                            ((scale_y * 5) - (pbo * (scale_y * 5))),
+                            ((arg_scale_y * 5) - (pbo * (arg_scale_y * 5))),
                             max / 1024.0 / (interval / 1000000000.0));
                 }
         }
 }
 
-
-static void svg_cpu_bar(void)
-{
+static void svg_cpu_bar(void) {
         int i;
 
         svg("<!-- CPU utilization graph -->\n");
@@ -605,15 +596,14 @@ static void svg_cpu_bar(void)
                 if (ptrt > 0.001) {
                         svg("<rect class=\"cpu\" x=\"%.03f\" y=\"%.03f\" width=\"%.03f\" height=\"%.03f\" />\n",
                             time_to_graph(sampletime[i - 1] - graph_start),
-                            (scale_y * 5) - (ptrt * (scale_y * 5)),
+                            (arg_scale_y * 5) - (ptrt * (arg_scale_y * 5)),
                             time_to_graph(sampletime[i] - sampletime[i - 1]),
-                            ptrt * (scale_y * 5));
+                            ptrt * (arg_scale_y * 5));
                 }
         }
 }
 
-static void svg_wait_bar(void)
-{
+static void svg_wait_bar(void) {
         int i;
 
         svg("<!-- Wait time aggregation box -->\n");
@@ -647,16 +637,15 @@ static void svg_wait_bar(void)
                 if (ptwt > 0.001) {
                         svg("<rect class=\"wait\" x=\"%.03f\" y=\"%.03f\" width=\"%.03f\" height=\"%.03f\" />\n",
                             time_to_graph(sampletime[i - 1] - graph_start),
-                            ((scale_y * 5) - (ptwt * (scale_y * 5))),
+                            ((arg_scale_y * 5) - (ptwt * (arg_scale_y * 5))),
                             time_to_graph(sampletime[i] - sampletime[i - 1]),
-                            ptwt * (scale_y * 5));
+                            ptwt * (arg_scale_y * 5));
                 }
         }
 }
 
 
-static void svg_entropy_bar(void)
-{
+static void svg_entropy_bar(void) {
         int i;
 
         svg("<!-- entropy pool graph -->\n");
@@ -670,15 +659,13 @@ static void svg_entropy_bar(void)
                 /* svg("<!-- entropy %.03f %i -->\n", sampletime[i], entropy_avail[i]); */
                 svg("<rect class=\"cpu\" x=\"%.03f\" y=\"%.03f\" width=\"%.03f\" height=\"%.03f\" />\n",
                     time_to_graph(sampletime[i - 1] - graph_start),
-                    ((scale_y * 5) - ((entropy_avail[i] / 4096.) * (scale_y * 5))),
+                    ((arg_scale_y * 5) - ((entropy_avail[i] / 4096.) * (arg_scale_y * 5))),
                     time_to_graph(sampletime[i] - sampletime[i - 1]),
-                    (entropy_avail[i] / 4096.) * (scale_y * 5));
+                    (entropy_avail[i] / 4096.) * (arg_scale_y * 5));
         }
 }
 
-
-static struct ps_struct *get_next_ps(struct ps_struct *ps)
-{
+static struct ps_struct *get_next_ps(struct ps_struct *ps) {
         /*
          * walk the list of processes and return the next one to be
          * painted
@@ -707,10 +694,8 @@ static struct ps_struct *get_next_ps(struct ps_struct *ps)
         return NULL;
 }
 
-
-static int ps_filter(struct ps_struct *ps)
-{
-        if (!filter)
+static int ps_filter(struct ps_struct *ps) {
+        if (!arg_filter)
                 return 0;
 
         /* can't draw data when there is only 1 sample (need start + stop) */
@@ -728,9 +713,7 @@ static int ps_filter(struct ps_struct *ps)
         return 0;
 }
 
-
-static void svg_do_initcall(int count_only)
-{
+static void svg_do_initcall(int count_only) {
         FILE _cleanup_pclose_ *f = NULL;
         double t;
         char func[256];
@@ -738,7 +721,7 @@ static void svg_do_initcall(int count_only)
         int usecs;
 
         /* can't plot initcall when disabled or in relative mode */
-        if (!initcall || relative) {
+        if (!initcall || arg_relative) {
                 kcount = 0;
                 return;
         }
@@ -818,9 +801,7 @@ static void svg_do_initcall(int count_only)
         }
 }
 
-
-static void svg_ps_bars(void)
-{
+static void svg_ps_bars(void) {
         struct ps_struct *ps;
         int i = 0;
         int j = 0;
@@ -966,7 +947,7 @@ static void svg_ps_bars(void)
                         break;
         }
 
-        for (i = ps->first; i < samples - (hz / 2); i++) {
+        for (i = ps->first; i < samples - (arg_hz / 2); i++) {
                 double crt;
                 double brt;
                 int c;
@@ -974,8 +955,8 @@ static void svg_ps_bars(void)
                 /* subtract bootchart cpu utilization from total */
                 crt = 0.0;
                 for (c = 0; c < cpus; c++)
-                        crt += cpustat[c].sample[i + ((int)hz / 2)].runtime - cpustat[c].sample[i].runtime;
-                brt = ps->sample[i + ((int)hz / 2)].runtime - ps->sample[i].runtime;
+                        crt += cpustat[c].sample[i + ((int)arg_hz / 2)].runtime - cpustat[c].sample[i].runtime;
+                brt = ps->sample[i + ((int)arg_hz / 2)].runtime - ps->sample[i].runtime;
 
                 /*
                  * our definition of "idle":
@@ -989,21 +970,19 @@ static void svg_ps_bars(void)
                             idletime);
                         svg("<line class=\"idle\" x1=\"%.03f\" y1=\"%.03f\" x2=\"%.03f\" y2=\"%.03f\" />\n",
                             time_to_graph(idletime),
-                            -scale_y,
+                            -arg_scale_y,
                             time_to_graph(idletime),
-                            ps_to_graph(pcount) + scale_y);
+                            ps_to_graph(pcount) + arg_scale_y);
                         svg("<text class=\"idle\" x=\"%.03f\" y=\"%.03f\">%.01fs</text>\n",
                             time_to_graph(idletime) + 5.0,
-                            ps_to_graph(pcount) + scale_y,
+                            ps_to_graph(pcount) + arg_scale_y,
                             idletime);
                         break;
                 }
         }
 }
 
-
-static void svg_top_ten_cpu(void)
-{
+static void svg_top_ten_cpu(void) {
         struct ps_struct *top[10];
         struct ps_struct emptyps;
         struct ps_struct *ps;
@@ -1036,9 +1015,7 @@ static void svg_top_ten_cpu(void)
                     top[n]->pid);
 }
 
-
-static void svg_top_ten_pss(void)
-{
+static void svg_top_ten_pss(void) {
         struct ps_struct *top[10];
         struct ps_struct emptyps;
         struct ps_struct *ps;
@@ -1071,9 +1048,7 @@ static void svg_top_ten_pss(void)
                     top[n]->pid);
 }
 
-
-void svg_do(const char *build)
-{
+void svg_do(const char *build) {
         struct ps_struct *ps;
 
         memset(&str, 0, sizeof(str));
@@ -1082,7 +1057,7 @@ void svg_do(const char *build)
 
         /* count initcall thread count first */
         svg_do_initcall(1);
-        ksize = (kcount ? ps_to_graph(kcount) + (scale_y * 2) : 0);
+        ksize = (kcount ? ps_to_graph(kcount) + (arg_scale_y * 2) : 0);
 
         /* then count processes */
         while ((ps = get_next_ps(ps))) {
@@ -1091,9 +1066,9 @@ void svg_do(const char *build)
                 else
                         pfiltered++;
         }
-        psize = ps_to_graph(pcount) + (scale_y * 2);
+        psize = ps_to_graph(pcount) + (arg_scale_y * 2);
 
-        esize = (entropy ? scale_y * 7 : 0);
+        esize = (arg_entropy ? arg_scale_y * 7 : 0);
 
         /* after this, we can draw the header with proper sizing */
         svg_header();
@@ -1102,25 +1077,25 @@ void svg_do(const char *build)
         svg_io_bi_bar();
         svg("</g>\n\n");
 
-        svg("<g transform=\"translate(10,%.03f)\">\n", 400.0 + (scale_y * 7.0));
+        svg("<g transform=\"translate(10,%.03f)\">\n", 400.0 + (arg_scale_y * 7.0));
         svg_io_bo_bar();
         svg("</g>\n\n");
 
-        svg("<g transform=\"translate(10,%.03f)\">\n", 400.0 + (scale_y * 14.0));
+        svg("<g transform=\"translate(10,%.03f)\">\n", 400.0 + (arg_scale_y * 14.0));
         svg_cpu_bar();
         svg("</g>\n\n");
 
-        svg("<g transform=\"translate(10,%.03f)\">\n", 400.0 + (scale_y * 21.0));
+        svg("<g transform=\"translate(10,%.03f)\">\n", 400.0 + (arg_scale_y * 21.0));
         svg_wait_bar();
         svg("</g>\n\n");
 
         if (kcount) {
-                svg("<g transform=\"translate(10,%.03f)\">\n", 400.0 + (scale_y * 28.0));
+                svg("<g transform=\"translate(10,%.03f)\">\n", 400.0 + (arg_scale_y * 28.0));
                 svg_do_initcall(0);
                 svg("</g>\n\n");
         }
 
-        svg("<g transform=\"translate(10,%.03f)\">\n", 400.0 + (scale_y * 28.0) + ksize);
+        svg("<g transform=\"translate(10,%.03f)\">\n", 400.0 + (arg_scale_y * 28.0) + ksize);
         svg_ps_bars();
         svg("</g>\n\n");
 
@@ -1132,14 +1107,14 @@ void svg_do(const char *build)
         svg_top_ten_cpu();
         svg("</g>\n\n");
 
-        if (entropy) {
-                svg("<g transform=\"translate(10,%.03f)\">\n", 400.0 + (scale_y * 28.0) + ksize + psize);
+        if (arg_entropy) {
+                svg("<g transform=\"translate(10,%.03f)\">\n", 400.0 + (arg_scale_y * 28.0) + ksize + psize);
                 svg_entropy_bar();
                 svg("</g>\n\n");
         }
 
-        if (pss) {
-                svg("<g transform=\"translate(10,%.03f)\">\n", 400.0 + (scale_y * 28.0) + ksize + psize + esize);
+        if (arg_pss) {
+                svg("<g transform=\"translate(10,%.03f)\">\n", 400.0 + (arg_scale_y * 28.0) + ksize + psize + esize);
                 svg_pss_graph();
                 svg("</g>\n\n");
 
diff --git a/src/bootchart/svg.h b/src/bootchart/svg.h
new file mode 100644
index 0000000000..e7369f5111
--- /dev/null
+++ b/src/bootchart/svg.h
@@ -0,0 +1,27 @@
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+#pragma once
+
+/***
+  This file is part of systemd.
+
+  Copyright (C) 2009-2013 Intel Coproration
+
+  Authors:
+    Auke Kok <auke-jan.h.kok@intel.com>
+
+  systemd is free software; you can redistribute it and/or modify it
+  under the terms of the GNU Lesser General Public License as published by
+  the Free Software Foundation; either version 2.1 of the License, or
+  (at your option) any later version.
+
+  systemd is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+void svg_do(const char *build);