treewide: use log_*_errno whenever %m is in the format string

[elogind.git] / src / bootchart / bootchart.c

diff --git a/src/bootchart/bootchart.c b/src/bootchart/bootchart.c
index 0ae72c29bbb1571268343f1728a7c0d5995ed940..5bb4247c8cbef713d27aaf7d553b87e9e83eb342 100644 (file)
--- a/src/bootchart/bootchart.c
+++ b/src/bootchart/bootchart.c
@@ -163,7 +163,7 @@ static void help(void) {
                 DEFAULT_INIT);
 }
 
-static int parse_args(int argc, char *argv[]) {
+static int parse_argv(int argc, char *argv[]) {
         static const struct option options[] = {
                 {"rel",           no_argument,        NULL,  'r'},
                 {"freq",          required_argument,  NULL,  'f'},
@@ -180,20 +180,22 @@ static int parse_args(int argc, char *argv[]) {
                 {"entropy",       no_argument,        NULL,  'e'},
                 {}
         };
-        int c;
+        int c, r;
 
-        while ((c = getopt_long(argc, argv, "erpf:n:o:i:FCchx:y:", options, NULL)) >= 0) {
-                int r;
+        if (getpid() == 1)
+                opterr = 0;
 
+        while ((c = getopt_long(argc, argv, "erpf:n:o:i:FCchx:y:", options, NULL)) >= 0)
                 switch (c) {
+
                 case 'r':
                         arg_relative = true;
                         break;
                 case 'f':
                         r = safe_atod(optarg, &arg_hz);
                         if (r < 0)
-                                log_warning("failed to parse --freq/-f argument '%s': %s",
-                                            optarg, strerror(-r));
+                                log_warning_errno(r, "failed to parse --freq/-f argument '%s': %m",
+                                                  optarg);
                         break;
                 case 'F':
                         arg_filter = false;
@@ -207,8 +209,8 @@ static int parse_args(int argc, char *argv[]) {
                 case 'n':
                         r = safe_atoi(optarg, &arg_samples_len);
                         if (r < 0)
-                                log_warning("failed to parse --samples/-n argument '%s': %s",
-                                            optarg, strerror(-r));
+                                log_warning_errno(r, "failed to parse --samples/-n argument '%s': %m",
+                                                  optarg);
                         break;
                 case 'o':
                         path_kill_slashes(optarg);
@@ -224,32 +226,36 @@ static int parse_args(int argc, char *argv[]) {
                 case '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));
+                                log_warning_errno(r, "failed to parse --scale-x/-x argument '%s': %m",
+                                                  optarg);
                         break;
                 case '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));
+                                log_warning_errno(r, "failed to parse --scale-y/-y argument '%s': %m",
+                                                  optarg);
                         break;
                 case 'e':
                         arg_entropy = true;
                         break;
                 case 'h':
                         help();
-                        exit (EXIT_SUCCESS);
+                        return 0;
+                case '?':
+                        if (getpid() != 1)
+                                return -EINVAL;
+                        else
+                                return 0;
                 default:
-                        break;
+                        assert_not_reached("Unhandled option code.");
                 }
-        }
 
-        if (arg_hz <= 0.0) {
-                fprintf(stderr, "Error: Frequency needs to be > 0\n");
+        if (arg_hz <= 0) {
+                log_error("Frequency needs to be > 0");
                 return -EINVAL;
         }
 
-        return 0;
+        return 1;
 }
 
 static void do_journal_append(char *file) {
@@ -279,12 +285,12 @@ static void do_journal_append(char *file) {
 
         f = open(file, O_RDONLY|O_CLOEXEC);
         if (f < 0) {
-                log_error("Failed to read bootchart data: %m");
+                log_error_errno(errno, "Failed to read bootchart data: %m");
                 return;
         }
         n = loop_read(f, p + 10, BOOTCHART_MAX, false);
         if (n < 0) {
-                log_error("Failed to read bootchart data: %s", strerror(-n));
+                log_error_errno(n, "Failed to read bootchart data: %m");
                 close(f);
                 return;
         }
@@ -296,7 +302,7 @@ static void do_journal_append(char *file) {
 
         r = sd_journal_sendv(iovec, j);
         if (r < 0)
-                log_error("Failed to send bootchart: %s", strerror(-r));
+                log_error_errno(r, "Failed to send bootchart: %m");
 }
 
 int main(int argc, char *argv[]) {
@@ -310,12 +316,13 @@ int main(int argc, char *argv[]) {
         time_t t = 0;
         int r;
         struct rlimit rlim;
+        bool has_procfs = false;
 
         parse_conf();
 
-        r = parse_args(argc, argv);
-        if (r < 0)
-                return EXIT_FAILURE;
+        r = parse_argv(argc, argv);
+        if (r <= 0)
+                return r == 0 ? EXIT_SUCCESS : EXIT_FAILURE;
 
         /*
          * If the kernel executed us through init=/usr/lib/systemd/systemd-bootchart, then
@@ -349,6 +356,16 @@ int main(int argc, char *argv[]) {
 
         log_uptime();
 
+        if (graph_start < 0.0) {
+                fprintf(stderr,
+                        "Failed to setup graph start time.\n\nThe system uptime "
+                        "probably includes time that the system was suspended. "
+                        "Use --rel to bypass this issue.\n");
+                exit (EXIT_FAILURE);
+        }
+
+        has_procfs = access("/proc/vmstat", F_OK) == 0;
+
         LIST_HEAD_INIT(head);
 
         /* main program loop */
@@ -363,8 +380,8 @@ int main(int argc, char *argv[]) {
 
                 sampledata = new0(struct list_sample_data, 1);
                 if (sampledata == NULL) {
-                        log_error("Failed to allocate memory for a node: %m");
-                        return -1;
+                        log_oom();
+                        return EXIT_FAILURE;
                 }
 
                 sampledata->sampletime = gettime_ns();
@@ -372,7 +389,9 @@ int main(int argc, char *argv[]) {
 
                 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));
+                        r = strftime(datestr, sizeof(datestr), "%Y%m%d-%H%M", localtime(&t));
+                        assert_se(r > 0);
+
                         snprintf(output_file, PATH_MAX, "%s/bootchart-%s.svg", arg_output_path, datestr);
                         of = fopen(output_file, "we");
                 }
@@ -385,11 +404,11 @@ 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();
 
@@ -415,7 +434,7 @@ int main(int argc, char *argv[]) {
                                         /* caught signal, probably HUP! */
                                         break;
                                 }
-                                log_error("nanosleep() failed: %m");
+                                log_error_errno(errno, "nanosleep() failed: %m");
                                 exit(EXIT_FAILURE);
                         }
                 } else {
@@ -440,7 +459,9 @@ int main(int argc, char *argv[]) {
 
         if (!of) {
                 t = time(NULL);
-                strftime(datestr, sizeof(datestr), "%Y%m%d-%H%M", localtime(&t));
+                r = strftime(datestr, sizeof(datestr), "%Y%m%d-%H%M", localtime(&t));
+                assert_se(r > 0);
+
                 snprintf(output_file, PATH_MAX, "%s/bootchart-%s.svg", arg_output_path, datestr);
                 of = fopen(output_file, "we");
         }
@@ -450,7 +471,7 @@ int main(int argc, char *argv[]) {
                 exit (EXIT_FAILURE);
         }
 
-        svg_do(build);
+        svg_do(strna(build));
 
         fprintf(stderr, "systemd-bootchart wrote %s\n", output_file);