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0938a1a02b
Found by clang-15.
src/xrt/auxiliary/math/m_permutation.c:133:15: warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes]
m_do_the_thing()
^
void
106 lines
1.9 KiB
C
106 lines
1.9 KiB
C
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// Copyright 2019-2020, Collabora, Ltd.
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// SPDX-License-Identifier: BSL-1.0
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/*!
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* @file
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* @brief Simple process handling
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* @author Christoph Haag <christoph.haag@collabora.com>
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* @ingroup aux_util
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*/
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#include "xrt/xrt_config.h"
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#include "xrt/xrt_config_build.h"
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#ifdef XRT_OS_LINUX
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#ifdef XRT_HAVE_LIBBSD
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#include <bsd/libutil.h>
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#endif
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#include <limits.h>
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#include <errno.h>
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#include <stdbool.h>
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#include "u_file.h"
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#include "u_logging.h"
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XRT_MAYBE_UNUSED static inline int
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get_pidfile_path(char *buf)
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{
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int size = u_file_get_path_in_runtime_dir(XRT_IPC_SERVICE_PID_FILENAME, buf, PATH_MAX);
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if (size == -1) {
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U_LOG_W("Failed to determine runtime dir, not creating pidfile");
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return -1;
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}
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return 0;
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}
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#endif
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#include "u_misc.h"
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struct u_process
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{
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#ifdef XRT_HAVE_LIBBSD
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struct pidfh *pfh;
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#else
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int pid;
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#endif
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};
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struct u_process *
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u_process_create_if_not_running(void)
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{
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#ifdef XRT_HAVE_LIBBSD
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char tmp[PATH_MAX];
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if (get_pidfile_path(tmp) < 0) {
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U_LOG_W("Failed to determine runtime dir, not creating pidfile");
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return NULL;
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}
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U_LOG_T("Using pidfile %s", tmp);
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pid_t otherpid;
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struct pidfh *pfh = pidfile_open(tmp, 0600, &otherpid);
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if (errno == EEXIST || pfh == NULL) {
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U_LOG_T("Failed to create pidfile (%s): Another Monado instance may be running", strerror(errno));
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// other process is locking pid file
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return NULL;
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}
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// either new or stale pidfile opened
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int write_ret = pidfile_write(pfh);
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if (write_ret != 0) {
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pidfile_close(pfh);
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return NULL;
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}
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struct u_process *ret = U_TYPED_CALLOC(struct u_process);
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ret->pfh = pfh;
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U_LOG_T("No other Monado instance was running, got new pidfile");
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return ret;
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#else
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struct u_process *ret = U_TYPED_CALLOC(struct u_process);
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//! @todo alternative implementation
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ret->pid = 0;
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return ret;
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#endif
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}
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void
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u_process_destroy(struct u_process *proc)
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{
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if (proc == NULL) {
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return;
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}
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#ifdef XRT_HAVE_LIBBSD
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pidfile_close(proc->pfh);
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#endif
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free(proc);
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}
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