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/*
* This file and its contents are supplied under the terms of the
* Common Development and Distribution License ("CDDL"), version 1.0.
* You may only use this file in accordance with the terms of version
* 1.0 of the CDDL.
*
* A full copy of the text of the CDDL should have accompanied this
* source. A copy of the CDDL is also available via the Internet at
* http://www.illumos.org/license/CDDL.
*/
/*
* Copyright 2019 Joyent, Inc.
*/
/*
* Utility functions for use in both acquire-lock and runtests.
*/
#include "util.h"
#include <err.h>
#include <errno.h>
#include <poll.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <strings.h>
#include <unistd.h>
boolean_t LOG = B_FALSE;
void
flock_log(const char *format, ...)
{
va_list ap;
if (!LOG) {
return;
}
va_start(ap, format);
(void) vfprintf(stderr, format, ap);
va_end(ap);
}
boolean_t
flock_nodata(int fd)
{
struct pollfd pfd = { fd, POLLIN, 0 };
int ret = poll(&pfd, 1, 1000);
if (ret == -1) {
err(EXIT_FAILURE, "poll failed");
}
return (ret == 0);
}
void
flock_block(int fd)
{
char buf[1];
int ret = 0;
while (ret < 1) {
ret = read(fd, buf, 1);
if (ret == -1) {
if (errno == EINTR)
continue;
err(EXIT_FAILURE, "read failed");
}
}
}
void
flock_alert(int fd)
{
int ret = 0;
while (ret < 1) {
ret = write(fd, "1", 1);
if (ret == -1) {
if (errno == EINTR)
continue;
err(EXIT_FAILURE, "write failed");
}
}
}
lock_style_t
flock_styleenum(char *stylestr)
{
if (strcmp(stylestr, "posix") == 0) {
return (LSTYLE_POSIX);
} else if (strcmp(stylestr, "ofd") == 0) {
return (LSTYLE_OFD);
} else if (strcmp(stylestr, "flock") == 0) {
return (LSTYLE_FLOCK);
} else {
errx(EXIT_FAILURE, BAD_LOCK_MESSAGE);
}
}
char *
flock_stylestr(lock_style_t style)
{
switch (style) {
case LSTYLE_POSIX:
return ("posix");
case LSTYLE_OFD:
return ("ofd");
case LSTYLE_FLOCK:
return ("flock");
default:
abort();
}
}
char *
flock_stylename(lock_style_t style)
{
switch (style) {
case LSTYLE_POSIX:
return ("fcntl(2) POSIX");
case LSTYLE_OFD:
return ("fcntl(2) OFD");
case LSTYLE_FLOCK:
return ("flock(3C)");
default:
abort();
}
}
void
flock_reinit(struct flock *flp, int ltype)
{
bzero(flp, sizeof (*flp));
flp->l_type = ltype;
}
char *
flock_cmdname(int cmd)
{
switch (cmd) {
case F_SETLK:
return ("F_SETLK");
case F_OFD_SETLK:
return ("F_OFD_SETLK");
case F_SETLKW:
return ("F_SETLKW");
case F_OFD_SETLKW:
return ("F_OFD_SETLKW");
case F_GETLK:
return ("F_GETLK");
case F_OFD_GETLK:
return ("F_OFD_GETLK");
case F_FLOCK:
return ("F_FLOCK");
case F_FLOCKW:
return ("F_FLOCKW");
#if !defined(_LP64)
case F_OFD_SETLK64:
return ("F_OFD_SETLK64");
case F_OFD_SETLKW64:
return ("F_OFD_SETLKW64");
case F_OFD_GETLK64:
return ("F_OFD_GETLK64");
#endif
default:
abort();
}
}
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