This commit is contained in:
Aliberk Sandıkçı 2023-07-27 12:54:29 +03:00
parent 5a16a9e503
commit a988524452
Signed by: asandikci
GPG Key ID: 25C67A03B5666BC1
1 changed files with 15 additions and 0 deletions

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@ -17,42 +17,57 @@ int _daemon(int nochdir, int noclose){
// pid_t defined in sys/types.h
// pid_t is a signed int data type
logg(1)
pid = fork(); // fork of the parent process
// fork() function defined in unistd.h
logg(2)
if (pid < 0){
logg(3)
exit(EXIT_FAILURE); // exit and EXIT_FAILURE defined in stdlib.h
}
else if (pid > 0){
logg(4)
exit(EXIT_SUCCESS);
}
logg(5)
sid = setsid();
logg(6)
if (sid < 0) {
logg(7)
exit(EXIT_FAILURE);
}
logg(8)
if ((chdir("/")) < 0) {
logg(10)
exit(EXIT_FAILURE);
}
logg(11)
if (!noclose) {
logg(12)
for (int i = 0; i < NR_OPEN; i++){
logg(13)
close(i);
// close(STDOUT_FILENO); => close(1);
// close(STDERR_FILENO); => close(2);
}
open("/dev/null", O_RDWR);
logg(14)
dup(0);
dup(0);
}
while (1) {
logg(15)
int status = system("/usr/lib/cdaemontmp/info");
// TODO SECURITY ISSUE
// LINK https://stackoverflow.com/questions/5237482/how-do-i-execute-an-external-program-within-c-code-in-linux-with-arguments#
sleep(1);
}
logg(16)
exit(EXIT_SUCCESS);
}