nginx/src/os/unix/ngx_unix_init.c

#include <ngx_config.h>
#include <ngx_core.h>


int  ngx_max_sockets;


int ngx_unix_init(ngx_log_t *log)
{
    struct sigaction sa;
    struct rlimit  rlmt;

    ngx_memzero(&sa, sizeof(struct sigaction));
    sa.sa_handler = SIG_IGN;
    sigemptyset(&sa.sa_mask);

    if (sigaction(SIGPIPE, &sa, NULL) == -1) {
        ngx_log_error(NGX_LOG_EMERG, log, ngx_errno,
                      "sigaction(SIGPIPE, SIG_IGN) failed");
        return NGX_ERROR;
    }


    if (getrlimit(RLIMIT_NOFILE, &rlmt) == -1) {
        ngx_log_error(NGX_LOG_ALERT, log, errno,
                      "getrlimit(RLIMIT_NOFILE) failed)");
        return NGX_ERROR;
    }

    ngx_log_error(NGX_LOG_INFO, log, 0,
                  "getrlimit(RLIMIT_NOFILE): %qd:%qd",
                  rlmt.rlim_cur, rlmt.rlim_max);

    ngx_max_sockets = rlmt.rlim_cur;

    return NGX_OK;
}


int ngx_unix_post_conf_init(ngx_log_t *log)
{
    ngx_fd_t  pp[2];

    if (pipe(pp) == -1) {
        ngx_log_error(NGX_LOG_EMERG, log, ngx_errno, "pipe() failed");
        return NGX_ERROR;
    }

    if (dup2(pp[1], STDERR_FILENO) == -1) {
        ngx_log_error(NGX_LOG_EMERG, log, errno, "dup2(STDERR) failed");
        return NGX_ERROR;
    }

    if (pp[1] > STDERR_FILENO) {
        if (close(pp[1]) == -1) {
            ngx_log_error(NGX_LOG_EMERG, log, errno, "close() failed");
            return NGX_ERROR;
        }
    }

    return NGX_OK;
}