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Unifying the code style
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@jtyr
jtyr committed Nov 29, 2016
1 parent 3763430 commit a41f91a
Showing 1 changed file with 32 additions and 37 deletions.
69 changes: 32 additions & 37 deletions src/daemon.c
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Original file line number Diff line number Diff line change
Expand Up @@ -55,16 +55,16 @@ int read_conf_file(int reload)

conf_file = fopen(conf_file_name, "r");

if(conf_file == NULL) {
if (conf_file == NULL) {
syslog(LOG_ERR, "Can not open config file: %s, error: %s",
conf_file_name, strerror(errno));
return -1;
}

ret = fscanf(conf_file, "%d", &delay);

if(ret > 0) {
if(reload == 1) {
if (ret > 0) {
if (reload == 1) {
syslog(LOG_INFO, "Reloaded configuration file %s of %s",
conf_file_name,
app_name);
Expand All @@ -90,22 +90,22 @@ int test_conf_file(char *_conf_file_name)

conf_file = fopen(_conf_file_name, "r");

if(conf_file == NULL) {
if (conf_file == NULL) {
fprintf(stderr, "Can't read config file %s\n",
_conf_file_name);
return EXIT_FAILURE;
}

ret = fscanf(conf_file, "%d", &delay);

if(ret <= 0) {
if (ret <= 0) {
fprintf(stderr, "Wrong config file %s\n",
_conf_file_name);
}

fclose(conf_file);

if(ret > 0)
if (ret > 0)
return EXIT_SUCCESS;
else
return EXIT_FAILURE;
Expand All @@ -117,24 +117,24 @@ int test_conf_file(char *_conf_file_name)
*/
void handle_signal(int sig)
{
if(sig == SIGINT) {
if (sig == SIGINT) {
fprintf(log_stream, "Debug: stopping daemon ...\n");
/* Unlock and close lockfile */
if(pid_fd != -1) {
if (pid_fd != -1) {
lockf(pid_fd, F_ULOCK, 0);
close(pid_fd);
}
/* Try to delete lockfile */
if(pid_file_name != NULL) {
if (pid_file_name != NULL) {
unlink(pid_file_name);
}
running = 0;
/* Reset signal handling to default behavior */
signal(SIGINT, SIG_DFL);
} else if(sig == SIGHUP) {
} else if (sig == SIGHUP) {
fprintf(log_stream, "Debug: reloading daemon config file ...\n");
read_conf_file(1);
} else if(sig == SIGCHLD) {
} else if (sig == SIGCHLD) {
fprintf(log_stream, "Debug: received SIGCHLD signal\n");
}
}
Expand All @@ -151,17 +151,17 @@ static void daemonize()
pid = fork();

/* An error occurred */
if(pid < 0) {
if (pid < 0) {
exit(EXIT_FAILURE);
}

/* Success: Let the parent terminate */
if(pid > 0) {
if (pid > 0) {
exit(EXIT_SUCCESS);
}

/* On success: The child process becomes session leader */
if(setsid() < 0) {
if (setsid() < 0) {
exit(EXIT_FAILURE);
}

Expand All @@ -172,12 +172,12 @@ static void daemonize()
pid = fork();

/* An error occurred */
if(pid < 0) {
if (pid < 0) {
exit(EXIT_FAILURE);
}

/* Success: Let the parent terminate */
if(pid > 0) {
if (pid > 0) {
exit(EXIT_SUCCESS);
}

Expand All @@ -189,8 +189,7 @@ static void daemonize()
chdir("/");

/* Close all open file descriptors */
for(fd = sysconf(_SC_OPEN_MAX); fd > 0; fd--)
{
for (fd = sysconf(_SC_OPEN_MAX); fd > 0; fd--) {
close(fd);
}

Expand All @@ -200,17 +199,15 @@ static void daemonize()
stderr = fopen("/dev/null", "w+");

/* Try to write PID of daemon to lockfile */
if(pid_file_name != NULL)
if (pid_file_name != NULL)
{
char str[256];
pid_fd = open(pid_file_name, O_RDWR|O_CREAT, 0640);
if(pid_fd < 0)
{
if (pid_fd < 0) {
/* Can't open lockfile */
exit(EXIT_FAILURE);
}
if(lockf(pid_fd, F_TLOCK, 0) < 0)
{
if (lockf(pid_fd, F_TLOCK, 0) < 0) {
/* Can't lock file */
exit(EXIT_FAILURE);
}
Expand Down Expand Up @@ -256,8 +253,8 @@ int main(int argc, char *argv[])
app_name = argv[0];

/* Try to process all command line arguments */
while( (value = getopt_long(argc, argv, "c:l:t:p:dh", long_options, &option_index)) != -1) {
switch(value) {
while ((value = getopt_long(argc, argv, "c:l:t:p:dh", long_options, &option_index)) != -1) {
switch (value) {
case 'c':
conf_file_name = strdup(optarg);
break;
Expand All @@ -284,7 +281,7 @@ int main(int argc, char *argv[])
}

/* When daemonizing is requested at command line. */
if(start_daemonized == 1) {
if (start_daemonized == 1) {
/* It is also possible to use glibc function deamon()
* at this point, but it is useful to customize your daemon. */
daemonize();
Expand All @@ -299,10 +296,9 @@ int main(int argc, char *argv[])
signal(SIGHUP, handle_signal);

/* Try to open log file to this daemon */
if(log_file_name != NULL) {
if (log_file_name != NULL) {
log_stream = fopen(log_file_name, "a+");
if (log_stream == NULL)
{
if (log_stream == NULL) {
syslog(LOG_ERR, "Can not open log file: %s, error: %s",
log_file_name, strerror(errno));
log_stream = stdout;
Expand All @@ -318,16 +314,16 @@ int main(int argc, char *argv[])
running = 1;

/* Never ending loop of server */
while(running == 1) {
while (running == 1) {
/* Debug print */
ret = fprintf(log_stream, "Debug: %d\n", counter++);
if(ret < 0) {
if (ret < 0) {
syslog(LOG_ERR, "Can not write to log stream: %s, error: %s",
(log_stream == stdout) ? "stdout" : log_file_name, strerror(errno));
break;
}
ret = fflush(log_stream);
if(ret != 0) {
if (ret != 0) {
syslog(LOG_ERR, "Can not fflush() log stream: %s, error: %s",
(log_stream == stdout) ? "stdout" : log_file_name, strerror(errno));
break;
Expand All @@ -342,8 +338,7 @@ int main(int argc, char *argv[])
}

/* Close log file, when it is used. */
if (log_stream != stdout)
{
if (log_stream != stdout) {
fclose(log_stream);
}

Expand All @@ -352,9 +347,9 @@ int main(int argc, char *argv[])
closelog();

/* Free allocated memory */
if(conf_file_name != NULL) free(conf_file_name);
if(log_file_name != NULL) free(log_file_name);
if(pid_file_name != NULL) free(pid_file_name);
if (conf_file_name != NULL) free(conf_file_name);
if (log_file_name != NULL) free(log_file_name);
if (pid_file_name != NULL) free(pid_file_name);

return EXIT_SUCCESS;
}

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