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add option for running in foreground

This commit is contained in:
Jason Diamond 2016-10-30 23:05:30 +00:00
parent b39130af0c
commit 1ec9472813
2 changed files with 40 additions and 31 deletions
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1
pigpio.h
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@ -6277,6 +6277,7 @@ after this command is issued.
#define PI_DEFAULT_CLK_MICROS 5
#define PI_DEFAULT_CLK_PERIPHERAL PI_CLOCK_PCM
#define PI_DEFAULT_IF_FLAGS 0
#define PI_DEFAULT_FOREGROUND 0
#define PI_DEFAULT_DMA_CHANNEL 14
#define PI_DEFAULT_DMA_PRIMARY_CHANNEL 14
#define PI_DEFAULT_DMA_SECONDARY_CHANNEL 6

70
pigpiod.c
View File

@ -55,6 +55,7 @@ static unsigned bufferSizeMilliseconds = PI_DEFAULT_BUFFER_MILLIS;
static unsigned clockMicros = PI_DEFAULT_CLK_MICROS;
static unsigned clockPeripheral = PI_DEFAULT_CLK_PERIPHERAL;
static unsigned ifFlags = PI_DEFAULT_IF_FLAGS;
static int foreground = PI_DEFAULT_FOREGROUND;
static unsigned DMAprimaryChannel = PI_DEFAULT_DMA_PRIMARY_CHANNEL;
static unsigned DMAsecondaryChannel = PI_DEFAULT_DMA_SECONDARY_CHANNEL;
static unsigned socketPort = PI_DEFAULT_SOCKET_PORT;
@ -98,6 +99,7 @@ void usage()
" -d value, primary DMA channel, 0-14, default 14\n" \
" -e value, secondary DMA channel, 0-14, default 6\n" \
" -f, disable fifo interface, default enabled\n" \
" -g, run in foreground (do not fork), default disabled\n" \
" -k, disable socket interface, default enabled\n" \
" -l, localhost socket only default local+remote\n" \
" -n IP addr, allow address, name or dotted, default allow all\n" \
@ -160,7 +162,7 @@ static void initOpts(int argc, char *argv[])
uint32_t addr;
int64_t mask;
while ((opt = getopt(argc, argv, "a:b:c:d:e:fkln:p:s:t:x:vV")) != -1)
while ((opt = getopt(argc, argv, "a:b:c:d:e:fgkln:p:s:t:x:vV")) != -1)
{
switch (opt)
{
@ -203,6 +205,10 @@ static void initOpts(int argc, char *argv[])
ifFlags |= PI_DISABLE_FIFO_IF;
break;
case 'g':
foreground = 1;
break;
case 'k':
ifFlags |= PI_DISABLE_SOCK_IF;
break;
@ -298,40 +304,42 @@ int main(int argc, char **argv)
pid_t pid;
int flags;
/* Fork off the parent process */
pid = fork();
if (pid < 0) { exit(EXIT_FAILURE); }
/* If we got a good PID, then we can exit the parent process. */
if (pid > 0) { exit(EXIT_SUCCESS); }
/* Change the file mode mask */
umask(0);
/* Open any logs here */
/* NONE */
/* Create a new SID for the child process */
if (setsid() < 0) fatal("setsid failed (%m)");
/* Change the current working directory */
if ((chdir("/")) < 0) fatal("chdir failed (%m)");
/* check command line parameters */
initOpts(argc, argv);
/* Close out the standard file descriptors */
fclose(stdin);
fclose(stdout);
if (!foreground) {
/* Fork off the parent process */
pid = fork();
if (pid < 0) { exit(EXIT_FAILURE); }
/* If we got a good PID, then we can exit the parent process. */
if (pid > 0) { exit(EXIT_SUCCESS); }
/* Change the file mode mask */
umask(0);
/* Open any logs here */
/* NONE */
/* Create a new SID for the child process */
if (setsid() < 0) fatal("setsid failed (%m)");
/* Change the current working directory */
if ((chdir("/")) < 0) fatal("chdir failed (%m)");
/* Close out the standard file descriptors */
fclose(stdin);
fclose(stdout);
}
/* configure library */