On Monday 01 September 2014 05:12 PM, Laurent Bigonville wrote:
>Give me your thoughts here. The daemon gets started as the user logs
>in. I think I made it follow some fdo xdg stuff. Is there something
>similar for logout ??
>daemon(0,0);
Are you sure that application started by xdg autostart can actually
fork? I've the feeling that gnome-session is loosing track of the PID
of the process (but this is a wild guess)
I have no idea about desktops. That's why I asked you.
The other approach would be to do a check in within the daemon itself.
It would mean walking down the /proc file system and look for the proc
name. Ugly, but may work. May look at it in the future.
#include <dirent.h>
#include <string.h>
#include <stdlib.h>
#include <stdio.h>
int main(int argc, char** argv)
{
if (argc < 2)
{
fprintf(stderr, "Usage: %s <process name>\n", argv[0]);
return 1;
}
const char* directory = "/proc";
size_t taskNameSize = 1024;
char* taskName = calloc(1, taskNameSize);
DIR* dir = opendir(directory);
if (dir)
{
struct dirent* de = 0;
while ((de = readdir(dir)) != 0)
{
if (strcmp(de->d_name, ".") == 0 || strcmp(de->d_name, "..") == 0)
continue;
int pid = -1;
int res = sscanf(de->d_name, "%d", &pid);
if (res == 1)
{
// we have a valid pid
// open the cmdline file to determine what's the name of the
process running
char cmdline_file[1024] = {0};
sprintf(cmdline_file, "%s/%d/cmdline", directory, pid);
FILE* cmdline = fopen(cmdline_file, "r");
if (getline(&taskName, &taskNameSize, cmdline) > 0)
{
// is it the process we care about?
if (strstr(taskName, argv[1]) != 0)
{
fprintf(stdout, "A %s process, with PID %d, has been
detected.\n", argv[1], pid);
}
}
fclose(cmdline);
}
}
closedir(dir);
}
// just let the OS free this process' memory!
//free(taskName);
return 0;
}
--
Ritesh Raj Sarraf
RESEARCHUT - http://www.researchut.com
"Necessity is the mother of invention."
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