nginx-0.3.8-RELEASE import *) Security: nginx now checks URI got from a backend in "X-Accel-Redirect" header line or in SSI file for the "/../" paths and zeroes. *) Change: nginx now does not treat the empty user name in the "Authorization" header line as valid one. *) Feature: the "ssl_session_timeout" directives of the ngx_http_ssl_module and ngx_imap_ssl_module. *) Feature: the "auth_http_header" directive of the ngx_imap_auth_http_module. *) Feature: the "add_header" directive. *) Feature: the ngx_http_realip_module. *) Feature: the new variables to use in the "log_format" directive: $bytes_sent, $apache_bytes_sent, $status, $time_gmt, $uri, $request_time, $request_length, $upstream_status, $upstream_response_time, $gzip_ratio, $uid_got, $uid_set, $connection, $pipe, and $msec. The parameters in the "%name" form will be canceled soon. *) Change: now the false variable values in the "if" directive are the empty string "" and string starting with "0". *) Bugfix: while using proxied or FastCGI-server nginx may leave connections and temporary files with client requests in open state. *) Bugfix: the worker processes did not flush the buffered logs on graceful exit. *) Bugfix: if the request URI was changes by the "rewrite" directive and the request was proxied in location given by regular expression, then the incorrect request was transferred to backend; the bug had appeared in 0.2.6. *) Bugfix: the "expires" directive did not remove the previous "Expires" header. *) Bugfix: nginx may stop to accept requests if the "rtsig" method and several worker processes were used. *) Bugfix: the "\"" and "\'" escape symbols were incorrectly handled in SSI commands. *) Bugfix: if the response was ended just after the SSI command and gzipping was used, then the response did not transferred complete or did not transferred at all.

/*
 * Copyright (C) Igor Sysoev
 */


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


#if (NGX_HAVE_MAP_ANON)

void *ngx_create_shared_memory(size_t size, ngx_log_t *log)
{
    void  *p;

    p = mmap(NULL, size, PROT_READ|PROT_WRITE, MAP_ANON|MAP_SHARED, -1, 0);

    if (p == MAP_FAILED) {
        ngx_log_error(NGX_LOG_ALERT, log, ngx_errno,
                      "mmap(MAP_ANON|MAP_SHARED, %uz) failed", size);
        return NULL;
    }

    return p;
}

#elif (NGX_HAVE_MAP_DEVZERO)

void *ngx_create_shared_memory(size_t size, ngx_log_t *log)
{
    void      *p;
    ngx_fd_t   fd;

    fd = open("/dev/zero", O_RDWR);

    if (fd == -1) {
        ngx_log_error(NGX_LOG_ALERT, log, ngx_errno,
                      "open(\"/dev/zero\") failed");
        return NULL;
    }

    p = mmap(NULL, size, PROT_READ|PROT_WRITE, MAP_SHARED, fd, 0);

    if (p == MAP_FAILED) {
        ngx_log_error(NGX_LOG_ALERT, log, ngx_errno,
                      "mmap(/dev/zero, MAP_SHARED, %uz) failed", size);
        p = NULL;
    }

    if (close(fd) == -1) {
        ngx_log_error(NGX_LOG_ALERT, log, ngx_errno,
                      "close(\"/dev/zero\") failed");
    }

    return p;
}

#elif (NGX_HAVE_SYSVSHM)

#include <sys/ipc.h>
#include <sys/shm.h>


void *ngx_create_shared_memory(size_t size, ngx_log_t *log)
{
    int    id;
    void  *p;

    id = shmget(IPC_PRIVATE, size, (SHM_R|SHM_W|IPC_CREAT));

    if (id == -1) {
        ngx_log_error(NGX_LOG_ALERT, log, ngx_errno,
                      "shmget(%uz) failed", size);
        return NULL;
    }

    ngx_log_debug1(NGX_LOG_DEBUG_CORE, log, 0, "shmget id: %d", id);

    p = shmat(id, NULL, 0);

    if (p == (void *) -1) {
        ngx_log_error(NGX_LOG_ALERT, log, ngx_errno, "shmat() failed");
        p = NULL;
    }

    if (shmctl(id, IPC_RMID, NULL) == -1) {
        ngx_log_error(NGX_LOG_ALERT, log, ngx_errno, "shmctl(IPC_RMID) failed");
        p = NULL;
    }

    return p;
}

#endif