daemoninit.c

unix环境高级编程的源代码

#include    <sys/types.h>
#include    <sys/stat.h>
#include    <fcntl.h>
#include    "ourhdr.h"

int
daemon_init(void)
{
    pid_t    pid;

    if ( (pid = fork()) < 0)
        return(-1);
    else if (pid != 0)
        exit(0);    /* parent goes bye-bye */

    /* child continues */
    setsid();        /* become session leader */

    chdir("/");        /* change working directory */

    umask(0);        /* clear our file mode creation mask */

    return(0);
}