From 4abab5ad6c8465a7528ccdd5f49367da05f78bbd Mon Sep 17 00:00:00 2001 From: Vladimir Azarov Date: Tue, 1 Oct 2024 15:47:05 +0200 Subject: Initial version --- src/legacy/daemon.c | 33 +++++++++++++++++++++++++++++++++ 1 file changed, 33 insertions(+) create mode 100644 src/legacy/daemon.c (limited to 'src/legacy/daemon.c') diff --git a/src/legacy/daemon.c b/src/legacy/daemon.c new file mode 100644 index 0000000..1568b1d --- /dev/null +++ b/src/legacy/daemon.c @@ -0,0 +1,33 @@ +#define _GNU_SOURCE +#include +#include + +int daemon(int nochdir, int noclose) +{ + if (!nochdir && chdir("/")) + return -1; + if (!noclose) { + int fd, failed = 0; + if ((fd = open("/dev/null", O_RDWR)) < 0) return -1; + if (dup2(fd, 0) < 0 || dup2(fd, 1) < 0 || dup2(fd, 2) < 0) + failed++; + if (fd > 2) close(fd); + if (failed) return -1; + } + + switch(fork()) { + case 0: break; + case -1: return -1; + default: _exit(0); + } + + if (setsid() < 0) return -1; + + switch(fork()) { + case 0: break; + case -1: return -1; + default: _exit(0); + } + + return 0; +} -- cgit v1.2.3