diff --git a/src/os/osf1/osf1_sigar.c b/src/os/osf1/osf1_sigar.c
new file mode 100644
index 00000000..12b75d92
--- /dev/null
+++ b/src/os/osf1/osf1_sigar.c
@@ -0,0 +1,251 @@
+#include "sigar.h"
+#include "sigar_private.h"
+#include "sigar_os.h"
+#include "sigar_util.h"
+
+int sigar_os_open(sigar_t **sigar)
+{
+    *sigar = malloc(sizeof(**sigar));
+
+    return SIGAR_OK;
+}
+
+int sigar_os_close(sigar_t *sigar)
+{
+    free(sigar);
+    return SIGAR_OK;
+}
+
+char *sigar_os_error_string(int err)
+{
+    return NULL;
+}
+
+int sigar_mem_get(sigar_t *sigar, sigar_mem_t *mem)
+{
+    mem->total  = -1;
+    mem->ram    = -1;
+    mem->used   = -1;
+    mem->free   = -1;
+    mem->shared = -1;
+    mem->buffer = -1;
+    mem->cached = -1;
+
+    return SIGAR_OK;
+}
+
+int sigar_swap_get(sigar_t *sigar, sigar_swap_t *swap)
+{
+    swap->total  = -1;
+    swap->used   = -1;
+    swap->free   = -1;
+
+    return SIGAR_OK;
+}
+
+int sigar_cpu_get(sigar_t *sigar, sigar_cpu_t *cpu)
+{
+    cpu->user = -1;
+    cpu->nice = -1;
+    cpu->sys  = -1;
+    cpu->idle = -1;
+
+    cpu->total = cpu->user + cpu->nice + cpu->sys + cpu->idle;
+
+    return SIGAR_OK;
+}
+
+int sigar_cpu_list_get(sigar_t *sigar, sigar_cpu_list_t *cpulist)
+{
+    return SIGAR_ENOTIMPL;
+}
+
+int sigar_uptime_get(sigar_t *sigar,
+                     sigar_uptime_t *uptime)
+{
+    uptime->uptime   = -1;
+
+    return SIGAR_OK;
+}
+
+int sigar_loadavg_get(sigar_t *sigar,
+                      sigar_loadavg_t *loadavg)
+{
+    loadavg->loadavg[0] = -1;
+    loadavg->loadavg[1] = -1;
+    loadavg->loadavg[2] = -1;
+
+    return SIGAR_OK;
+}
+
+int sigar_proc_list_get(sigar_t *sigar,
+                        sigar_proc_list_t *proclist)
+{
+    return SIGAR_ENOTIMPL;
+}
+
+int sigar_proc_stat_get(sigar_t *sigar,
+                        sigar_proc_stat_t *procstat)
+{
+    int status = /* XXX optimize */
+        sigar_proc_count(sigar, &procstat->total);
+
+    return status;
+}
+
+int sigar_proc_mem_get(sigar_t *sigar, sigar_pid_t pid,
+                       sigar_proc_mem_t *procmem)
+{
+    procmem->size = -1;
+    procmem->vsize = -1;
+    procmem->share = -1;
+    procmem->rss = -1;
+    procmem->resident = -1;
+
+    return SIGAR_OK;
+}
+
+int sigar_proc_cred_get(sigar_t *sigar, sigar_pid_t pid,
+                        sigar_proc_cred_t *proccred)
+{
+    proccred->uid = -1;
+    proccred->gid = -1;
+    proccred->euid = -1;
+    proccred->egid = -1;
+
+    return SIGAR_OK;
+}
+
+int sigar_proc_time_get(sigar_t *sigar, sigar_pid_t pid,
+                        sigar_proc_time_t *proctime)
+{
+    proctime->start_time = -1;
+    proctime->user = -1;
+    proctime->sys  = -1;
+    proctime->total = proctime->user + proctime->sys;
+
+    return SIGAR_OK;
+}
+
+int sigar_proc_state_get(sigar_t *sigar, sigar_pid_t pid,
+                         sigar_proc_state_t *procstate)
+{
+    SIGAR_SSTRCPY(procstate->name, "java");
+    procstate->ppid = -1;
+    procstate->priority = -1;
+    procstate->nice = -1;
+    procstate->tty = -1;
+    procstate->state = 'R';
+
+    return SIGAR_OK;
+}
+
+int sigar_proc_args_get(sigar_t *sigar, sigar_pid_t pid,
+                        sigar_proc_args_t *procargs)
+{
+    return SIGAR_ENOTIMPL;
+}
+
+int sigar_proc_env_get(sigar_t *sigar, sigar_pid_t pid,
+                       sigar_proc_env_t *procenv)
+{
+    return SIGAR_ENOTIMPL;
+}
+
+int sigar_proc_fd_get(sigar_t *sigar, sigar_pid_t pid,
+                      sigar_proc_fd_t *procfd)
+{
+    procfd->total = -1;
+    return SIGAR_OK;
+}
+
+int sigar_proc_exe_get(sigar_t *sigar, sigar_pid_t pid,
+                       sigar_proc_exe_t *procexe)
+{
+    return SIGAR_ENOTIMPL;
+}
+
+int sigar_proc_modules_get(sigar_t *sigar, sigar_pid_t pid,
+                           sigar_proc_modules_t *procmods)
+{
+    return SIGAR_ENOTIMPL;
+}
+
+int sigar_os_fs_type_get(sigar_file_system_t *fsp)
+{
+    fsp->type = SIGAR_FSTYPE_UNKNOWN;
+
+    return SIGAR_OK;
+}
+
+int sigar_file_system_list_get(sigar_t *sigar,
+                               sigar_file_system_list_t *fslist)
+{
+    sigar_file_system_list_create(fslist);
+
+    return SIGAR_OK;
+}
+
+int sigar_file_system_usage_get(sigar_t *sigar,
+                                const char *dirname,
+                                sigar_file_system_usage_t *fsusage)
+{
+    fsusage->total = -1;
+    fsusage->free  = -1;
+    fsusage->avail = -1;
+    fsusage->files = -1;
+    fsusage->free_files = -1;
+
+    return SIGAR_OK;
+}
+
+int sigar_cpu_info_list_get(sigar_t *sigar,
+                            sigar_cpu_info_list_t *cpu_infos)
+{
+    sigar_cpu_info_t *info;
+
+    sigar_cpu_info_list_create(cpu_infos);
+
+    info = &cpu_infos->data[cpu_infos->number++];
+
+    SIGAR_SSTRCPY(info->vendor, "vendor");
+    SIGAR_SSTRCPY(info->model, "model");
+    info->mhz = -1;
+    info->cache_size = -1;
+
+    return SIGAR_OK;
+}
+
+int sigar_net_route_list_get(sigar_t *sigar,
+                             sigar_net_route_list_t *routelist)
+{
+    return SIGAR_ENOTIMPL;
+}
+
+int sigar_net_interface_stat_get(sigar_t *sigar, const char *name,
+                                 sigar_net_interface_stat_t *ifstat)
+{
+    ifstat->rx_bytes      = -1;
+    ifstat->rx_packets    = -1;
+    ifstat->rx_errors     = -1;
+    ifstat->rx_dropped    = -1;
+    ifstat->rx_overruns   = -1;
+    ifstat->rx_frame      = -1;
+
+    ifstat->tx_bytes      = -1;
+    ifstat->tx_packets    = -1;
+    ifstat->tx_errors     = -1;
+    ifstat->tx_dropped    = -1;
+    ifstat->tx_overruns   = -1;
+    ifstat->tx_collisions = -1;
+    ifstat->tx_carrier    = -1;
+
+    return SIGAR_OK;
+}
+
+int sigar_net_connection_list_get(sigar_t *sigar,
+                                  sigar_net_connection_list_t *connlist,
+                                  int flags)
+{
+    return SIGAR_ENOTIMPL;
+}
diff --git a/src/os/osf1/sigar_os.h b/src/os/osf1/sigar_os.h
new file mode 100644
index 00000000..068fc3c6
--- /dev/null
+++ b/src/os/osf1/sigar_os.h
@@ -0,0 +1,8 @@
+#ifndef SIGAR_OS_H
+#define SIGAR_OS_H
+
+struct sigar_t {
+    SIGAR_T_BASE;
+};
+
+#endif /* SIGAR_OS_H */