syslog-provider.c

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#ifndef _WIN32
 
#include <syslog.h>
#include <trace-syslog-util.h>
#include <stdlib.h>
#include <string.h>

struct syslog_provider
{
    char *ident;
};
 
syslog_provider_t *TRACE_SYSLOG_UTIL_API
    syslog_provider_init(const char *ident, int facility)
{
    syslog_provider_t *handle;
    size_t len;
 
    if (ident == NULL)
    {
        return NULL;
    }
 
    handle = (syslog_provider_t *)malloc(sizeof(syslog_provider_t));
    if (handle == NULL)
    {
        return NULL;
    }
 
    /* ident 文字列を複製して保持 (openlog はポインタを保持するため) */
    len = strlen(ident) + 1;
    handle->ident = (char *)malloc(len);
    if (handle->ident == NULL)
    {
        free(handle);
        return NULL;
    }
    memcpy(handle->ident, ident, len);
 
    openlog(handle->ident, LOG_NDELAY | LOG_PID, facility);
 
    return handle;
}
 
int TRACE_SYSLOG_UTIL_API
    syslog_provider_write(syslog_provider_t *handle, int level, const char *message)
{
    if (handle == NULL || message == NULL)
    {
        return 0;
    }
 
    syslog(level, "%s", message);
 
    return 0;
}
 
void TRACE_SYSLOG_UTIL_API
    syslog_provider_dispose(syslog_provider_t *handle)
{
    if (handle == NULL)
    {
        return;
    }
 
    closelog();
    free(handle->ident);
    free(handle);
}
 
int TRACE_SYSLOG_UTIL_API
    syslog_provider_rename(syslog_provider_t *handle, const char *new_ident)
{
    char *dup;
    size_t len;
 
    if (handle == NULL || new_ident == NULL)
    {
        return -1;
    }
 
    len = strlen(new_ident) + 1;
    dup = (char *)malloc(len);
    if (dup == NULL)
    {
        return -1;
    }
    memcpy(dup, new_ident, len);
 
    closelog();
    free(handle->ident);
    handle->ident = dup;
    openlog(handle->ident, LOG_NDELAY | LOG_PID, LOG_USER);
 
    return 0;
}
 
#else /* _WIN32 */
    #pragma warning(disable : 4206)
#endif /* _WIN32 */