mirror of
https://gitlab.torproject.org/tpo/core/tor.git
synced 2024-12-06 19:41:15 +01:00
Nick Mathewson
e7f5f48d68
Fun fact: these files used to be called log.[ch] until we ran into conflicts with systems having a log.h file. But now that we always include "lib/log/log.h", we should be fine.
53 lines
1.1 KiB
C
53 lines
1.1 KiB
C
/* Copyright (c) 2003-2004, Roger Dingledine
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* Copyright (c) 2004-2006, Roger Dingledine, Nick Mathewson.
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* Copyright (c) 2007-2018, The Tor Project, Inc. */
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/* See LICENSE for licensing information */
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/**
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* \file pidfile.c
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* \brief Record this process's PID to disk.
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**/
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#include "orconfig.h"
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#include "lib/process/pidfile.h"
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#include "lib/log/log.h"
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#ifdef HAVE_SYS_TYPES_H
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#include <sys/types.h>
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#endif
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#ifdef HAVE_UNISTD_H
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#include <unistd.h>
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#endif
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#include <errno.h>
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#include <stdio.h>
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#include <string.h>
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/** Write the current process ID, followed by NL, into <b>filename</b>.
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* Return 0 on success, -1 on failure.
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*/
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int
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write_pidfile(const char *filename)
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{
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FILE *pidfile;
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if ((pidfile = fopen(filename, "w")) == NULL) {
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log_warn(LD_FS, "Unable to open \"%s\" for writing: %s", filename,
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strerror(errno));
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return -1;
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} else {
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#ifdef _WIN32
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int pid = (int)_getpid();
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#else
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int pid = (int)getpid();
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#endif
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int rv = 0;
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if (fprintf(pidfile, "%d\n", pid) < 0)
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rv = -1;
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if (fclose(pidfile) < 0)
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rv = -1;
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return rv;
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}
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}
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