/*
* Part of Very Secure FTPd
* Licence: GPL v2
* Author: Chris Evans
*
* sysutil.c
*
* Routines to make the libc/syscall API more pleasant to use. Long term,
* more libc/syscalls will go in here to reduce the number of .c files with
* dependencies on libc or syscalls.
*/
#define PRIVATE_HANDS_OFF_syscall_retval syscall_retval
#define PRIVATE_HANDS_OFF_exit_status exit_status
#include "sysutil.h"
#include "utility.h"
#include "tunables.h"
#include "sysdeputil.h"
/* Activate 64-bit file support on Linux/32bit plus others */
#define _FILE_OFFSET_BITS 64
#define _LARGEFILE_SOURCE 1
#define _LARGEFILE64_SOURCE 1
#define _LARGE_FILES 1
/* For Linux, this adds nothing :-) */
#include "port/porting_junk.h"
#include <signal.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/mman.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <netinet/in.h>
#include <stdio.h>
#include <dirent.h>
#include <time.h>
#include <arpa/inet.h>
#include <errno.h>
#include <pwd.h>
#include <grp.h>
#include <ctype.h>
#include <sys/wait.h>
#include <sys/time.h>
/* Must be before netinet/ip.h. Found on FreeBSD, Solaris */
#include <netinet/in_systm.h>
#include <netinet/ip.h>
#include <netinet/tcp.h>
#include <limits.h>
#include <syslog.h>
#include <utime.h>
#include <netdb.h>
#include <sys/resource.h>
/* Private variables to this file */
/* Current umask() */
static unsigned int s_current_umask;
/* Cached time */
static struct timeval s_current_time;
/* Current pid */
static int s_current_pid = -1;
/* Exit function */
static exitfunc_t s_exit_func;
/* Difference in timezone from GMT in seconds */
static long s_timezone;
/* Our internal signal handling implementation details */
static struct vsf_sysutil_sig_details
{
vsf_sighandle_t sync_sig_handler;
void* p_private;
volatile sig_atomic_t pending;
int running;
int use_alarm;
} s_sig_details[NSIG];
static vsf_context_io_t s_io_handler;
static void* s_p_io_handler_private;
static int s_io_handler_running;
struct vsf_sysutil_sockaddr
{
union
{
struct sockaddr u_sockaddr;
struct sockaddr_in u_sockaddr_in;
struct sockaddr_in6 u_sockaddr_in6;
} u;
};
/* File locals */
static void vsf_sysutil_common_sighandler(int signum);
static void vsf_sysutil_alrm_sighandler(int signum);
static int vsf_sysutil_translate_sig(const enum EVSFSysUtilSignal sig);
static void vsf_sysutil_set_sighandler(int sig, void (*p_handlefunc)(int));
static int vsf_sysutil_translate_memprot(
const enum EVSFSysUtilMapPermission perm);
static int vsf_sysutil_translate_openmode(
const enum EVSFSysUtilOpenMode mode);
static void vsf_sysutil_alloc_statbuf(struct vsf_sysutil_statbuf** p_ptr);
void vsf_sysutil_sockaddr_alloc(struct vsf_sysutil_sockaddr** p_sockptr);
static int lock_internal(int fd, int lock_type);
static void
vsf_sysutil_alrm_sighandler(int signum)
{
(void) signum;
alarm(1);
}
static void
vsf_sysutil_common_sighandler(int signum)
{
if (signum < 0 || signum >= NSIG)
{
/* "cannot happen" */
return;
}
if (s_sig_details[signum].sync_sig_handler)
{
s_sig_details[signum].pending = 1;
/* Since this synchronous signal framework has a small race (signal coming
* in just before we start a blocking call), there's the option to fire an
* alarm repeatedly until the signal is handled.
*/
if (s_sig_details[signum].use_alarm)
{
alarm(1);
}
}
}
/* Notes. This signal check is evaluated after potentially blocking system
* calls, i.e. at highly defined points in the code. Since we only interrupt
* at these definite locations, the signal handlers can be non-trivial
* without us having to worry about re-entrancy.
*
* We guarantee that a handler for a given signal is not re-entrant. This
* is taken care of by the "running" flag.
*
* This call itself can only be re-entered once we dereference the actual
* hander function pointer, so we are safe with respect to races modifying
* the "running" flag.
*/
void
vsf_sysutil_check_pending_actions(
const enum EVSFSysUtilInterruptContext context, int retval, int fd)
{
unsigned int i;
/* Check the i/o handler before the signal handlers */
if (s_io_handler && !s_io_handler_running && context == kVSFSysUtilIO)
{
s_io_handler_running = 1;
(*s_io_handler)(retval, fd, s_p_io_handler_private);
s_io_handler_running = 0;
}
for (i=0; i < NSIG; ++i)
{
if (s_sig_details[i].pending && !s_sig_details[i].running)
{
s_sig_details[i].running = 1;
if (s_sig_details[i].use_alarm)
{
alarm(0);
}
if (s_sig_details[i].sync_sig_handler)
{
s_sig_details[i].pending = 0;
(*(s_sig_details[i].sync_sig_handler))(s_sig_details[i].p_private);
}
s_sig_details[i].running = 0;
}
}
}
static int
vsf_sysutil_translate_sig(const enum EVSFSysUtilSignal sig)
{
int realsig = 0;
switch (sig)
{
case kVSFSysUtilSigALRM:
realsig = SIGALRM;
break;
case kVSFSysUtilSigTERM:
realsig = SIGTERM;
break;
case kVSFSysUtilSigCHLD:
realsig = SIGCHLD;
break;
case kVSFSysUtilSigPIPE:
realsig = SIGPIPE;
break;
case kVSFSysUtilSigURG:
realsig = SIGURG;
break;
case kVSFSysUtilSigHUP:
realsig = SIGHUP;
break;
default:
bug("unknown signal in vsf_sysutil_translate_sig");
break;
}
if (realsig < 0 || realsig >= NSIG)
{
bug("signal out of range in vsf_sysutil_translate_sig");
}
return realsig;
}
void
vsf_sysutil_install_sighandler(const enum EVSFSysUtilSignal sig,
vsf_sighandle_t handler,
void* p_private,
int use_alarm)
{
int realsig = vsf_sysutil_translate_sig(sig);
s_sig_details[realsig].p_private = p_private;
s_sig_details[realsig].sync_sig_handler = handler;
s_sig_details[realsig].use_alarm = use_alarm;
vsf_sysutil_set_sighandler(realsig, vsf_sysutil_common_sighandler);
if (use_alarm && realsig != SIGALRM)
{
vsf_sysutil_set_sighandler(SIGALRM, vsf_sysutil_alrm_sighandler);
}
}
void
vsf_sysutil_default_sig(const enum EVSFSysUtilSignal sig)
{
int realsig = vsf_sysutil_translate_sig(sig);
vsf_sysutil_set_sighandler(realsig, SIG_DFL);
s_sig_details[realsig].p_private = NULL;
s_sig_details[realsig].sync_sig_handler = NULL;
}
void
vsf_sysutil_install_null_sighandler(const enum EVSFSysUtilSignal sig)
{
int realsig = vsf_sysutil_translate_sig(sig);
s_sig_details[realsig].p_private = NULL;
s_sig_details[realsig].sync_sig_handler = NULL;
vsf_sysutil_set_sighandler(realsig, vsf_sysutil_common_sighandler);
}
void
vsf_sysutil_install_async_sighandler(const enum EVSFSysUtilSignal sig,
vsf_async_sighandle_t handler)
{
int realsig = vsf_sysutil_translate_sig(sig);
s_sig_details[realsig].p_private = NULL;
s_sig_details[realsig].sync_sig_handler = NULL;
vsf_sysutil_block_sig(sig);
vsf_sysutil_set_sighandler(realsig, handler);
}
static void
vsf_sysutil_set_sighandler(int sig, void (*p_handlefunc)(int))
{
int retval;
struct sigaction sigact;
vsf_sysutil_memclr(&sigact, sizeof(sigact));
sigact.sa_handler = p_handlefunc;
retval = sigfillset(&sigact.sa_mask);
if (retval != 0)
{
die("sigfillset");
}
retval = sigaction(sig, &sigact, NULL);
if (retval != 0)
{
die("sigaction");
}
}
void
vsf_sysutil_block_sig(const enum EVSFSysUtilSignal sig)
{
sigset_t sset;
int retval;
int realsig = vsf_sysutil_translate_sig(sig);
retval = sigemptyset(&sset);
if (retval != 0)
{
die("sigemptyset");
}
retval = sigaddset(&sset, realsig);
if (retval != 0)
{
die("sigaddset");
}
retval = sigprocmask(SIG_BLOCK, &sset, NULL);
if (retval != 0)
{
die("sigprocmask");
}
}
void
vsf_sysutil_unblock_sig(const enum EVSFSysUtilSignal sig)
{
sigset_t sset;
int retval;
int realsig = vsf_sysutil_translate_sig(sig);
retval = sigemptyset(&sset);
if (retval != 0)
{
die("sigemptyset");
}
retval = sigaddset(&sset, realsig);
if (retval != 0)
{
die("sigaddset");
}
retval = sigprocmask(SIG_UNBLOCK, &sset, NULL);
if (retval != 0)
{
die("sigprocmask");
}
}
void
vsf_sysutil_install_io_handler(vsf_context_io_t handler, void* p_private)
{
if (s_io_handler != NULL)
{
bug("double register of i/o handler");
}
s_io_handler = handler;
s_p_io_handler_private = p_private;
}
void
vsf_sysutil_uninstall_io_handler(void)
{
if (s_io_handler == NULL)
{
bug("no i/o handler to unregister!");
}
s_io_handler = NULL;
s_p_io_handler_private = NULL;
}
void
vsf_sysutil_set_alarm(const unsigned int trigger_seconds)
{
(void) alarm(trigger_seconds);
}
void
vsf_sysutil_clear_alarm(void)
{
vsf_sysutil_set_alarm(0);
}
int
vsf_sysutil_read(const int fd, void* p_buf, const unsigned int size)
{
while (1)
{
int retval = read(fd, p_buf, size);
int saved_errno = errno;
vsf_sysutil_check_pending_actions(kVSFSysUtilIO, retval, fd);
if (retval < 0 && saved_errno == EINTR)
{
continue;
}
return retval;
}
}
int
vsf_sysutil_write(const int fd, const void* p_buf, const unsigned int size)
{
while (1)
{
int retval = write(fd, p_buf, size);
int saved_errno = errno;
vsf_sysutil_check_pending_actions(kVSFSysUtilIO, retval, fd);
if (retval < 0 && saved_errno == EINTR)
{
continue;
}
return retval;
}
}
int
vsf_sysutil_read_loop(const int fd, void* p_buf, unsigned int size)
{
int retval;
int num_read = 0;
if (size > INT_MAX)
{
die("size too big in vsf_sysutil_read_loop");
}
while (1)
{
retval = vsf_sysutil_read(fd, (char*)p_buf + num_read, size);
if (retval < 0)
{
return retval;
}
else if (retval == 0)
{
/* Read all we're going to read.. */
return num_read;
}
if ((unsigned int) retval > size)
{
die("retval too big in vsf_sysutil_read_loop");
}
num_read += retval;
size -= (unsigned int) retval;
if (size == 0)
{
/* Hit the read target, cool. */
return num_read;
}
}
}
int
vsf_sysutil_write_loop(const int fd, const void* p_buf, unsigned int size)
{
int retval;
int num_written = 0;
if (size > INT_MAX)
{
die("size too big in vsf_sysutil_write_loop");
}
while (1)
{
retval = vsf_sysutil_write(fd, (const char*)p_buf + num_written, size);
if (retval < 0)
{
/* Error */
return retval;
}
else if (retval == 0)
{
/* Written all we're going to write.. */
return num_written;
}
if ((unsigned int) retval > size)
{
die("retval too big in vsf_sysutil_write_loop");
}
num_written += retval;
size -= (unsigned int) retval;
if (size == 0)
{
/* Hit the write target, cool. */
return num_written;
}
}
}
filesize_t
vsf_sysutil_get_file_offset(const int file_fd)
{
filesize_t retval = lseek(file_fd, 0, SEEK_CUR);
if (retval < 0)
{
die("lseek");
}
return retval;
}
void
vsf_sysutil_lseek_to(const int fd, filesize_t seek_pos)
{
filesize_t retval;
if (seek_pos < 0)
{
die("negative seek_pos in vsf_sysutil_lseek_to");
}
retval = lseek(fd, seek_pos, SEEK_SET);
if (retval < 0)
{
die("lseek");
}
}
void
vsf_sysutil_lseek_end(const int fd)
{
filesize_t retval;
retval = lseek(fd, 0, SEEK_END);
if (retval < 0)
{
die("lseek");
}
}
void*
vsf_sysutil_malloc(unsigned int size)
{
void* p_ret;
/* Paranoia - what if we got an integer overflow/underflow? */
if (size == 0 || size > INT_MAX)
{
bug("zero or big size in vsf_sysutil_malloc");
}
p_ret = malloc(size);
if (p_ret == NULL)
{
die("malloc");
}
return p_ret;
}
void*
vsf_sysutil_realloc(void* p_ptr, unsigned int size)
{
void* p_ret;
if (size == 0 || size > INT_MAX)
{
bug("zero or big size in vsf_sysutil_realloc");
}
p_ret = realloc(p_ptr, size);
if (p_ret == NULL)
{
die("realloc");
}
return p_ret;
}
void
vsf_sysutil_free(void* p_ptr)
{
if (p_ptr == NULL)
{
bug("vsf_sysutil_free got a null pointer");
}
free(p_ptr);
}
unsigned int
vsf_sysutil_getpid(void)
{
if (s_current_pid == -1)
{
s_current_pid = vsf_sysutil_getpid_nocache();
}
return (unsigned int) s_current_pid;
}
int
vsf_sysutil_fork(void)
{
int retval = vsf_sysutil_fork_failok();
if (retval < 0)
{
die("fork");
}
return retval;
}
int
vsf_sysutil_fork_failok(void)
{
int retval;
retval = fork();
if (retval == 0)
{
vsf_sysutil_post_fork();
}
return retval;
}
void
vsf_sysutil_set_exit_func(exitfunc_t exitfunc)
{
s_exit_func = exitfunc;
}
void
vsf_sysutil_exit(int exit_code)
{
if (s_exit_func)
{
exitfunc_t curr_func = s_exit_func;
/* Prevent recursion */
s_exit_func = 0;
(*curr_func)();
}
_exit(exit_code);
}
struct vsf_sysutil_wait_retval
vsf_sysutil_wait(void)
{
struct vsf_sysutil_wait_retval retval;
vsf_sysutil_memclr(&retval, sizeof(retval));
while (1)
{
int sys_ret = wait(&retval.exit_status);
if (sys_ret < 0 && errno == EINTR)
{
vsf_sysutil_check_pending_actions(kVSFSysUtilUnknown, 0, 0);
continue;
}
retval.syscall_retval = sys_ret;
return retval;
}
}
int
vsf_sysutil_wait_reap_one(void)
{
int retval = waitpid(-1, NULL, WNOHANG);
if (retval == 0 || (retval < 0 && errno == ECHILD))
{
/* No more children */
return 0;
}
if (retval < 0)
{
die("waitpid");
}
/* Got one */
return retval;
}
int
vsf_sysutil_wait_get_retval(const struct vsf_sysutil_wait_retval* p_waitret)
{
return p_waitret->syscall_retval;
}
int
vsf_sysutil_wait_exited_normally(
const struct vsf_sysutil_wait_retval* p_waitret)
{
int status = ((struct vsf_sysutil_wait_retval*) p_waitret)->exit_status;
return WIFEXITED(status);
}
int
vsf_sysutil_wait_get_exitcode(const struct vsf_sysutil_wait_retval* p_waitret)
{
int status;
if (!vsf_sysutil_wait_exited_normally(p_waitret))
{
bug("not a normal exit in vsf_sysutil_wait_get_exitcode");
}
status = ((struct vsf_sysutil_wait_retval*) p_waitret)->exit_status;
return WEXITSTATUS(status);
}
void
vsf_sysutil_activate_keepalive(int fd)
{
int keepalive = 1;
int retval = setsockopt(fd, SOL_SOCKET, SO_KEEPALIVE, &keepalive,
sizeof(keepalive));
if (retval != 0)
{
die("setsockopt: keepalive");
}
}
void
vsf_sysutil_activate_reuseaddr(int fd)
{
int reuseaddr = 1;
int retval = setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &reuseaddr,
sizeof(reuseaddr));
if (retval != 0)
{
die("setsockopt: reuseaddr");
}
}
void
vsf_sysutil_set_nodelay(int fd)
{
int nodelay = 1;
int retval = setsockopt(fd, IPPROTO_TCP, TCP_NODELAY, &nodelay,
sizeof(nodelay));
if (retval != 0)
{
die("setsockopt: nodelay");
}
}
void
vsf_sysutil_activate_sigurg(int fd)
{
int retval = fcntl(fd, F_SETOWN, vsf_sysutil_getpid());
if (retval != 0)
{
die("fcntl");
}
}
void
vsf_sysutil_activate_oobinline(int fd)
{
int oob_inline = 1;
int retval = setsockopt(fd, SOL_SOCKET, SO_OOBINLINE, &oob_inline,
sizeof(oob_inline));
if (retval != 0)
{
die("setsockopt: oobinline");
}
}
void
vsf_sysutil_set_iptos_throughput(int fd)
{
int tos = IPTOS_THROUGHPUT;
/* Ignore failure to set (maybe this IP stack demands privilege for this) */
(void) setsockopt(fd, IPPROTO_IP, IP_TOS, &tos, sizeof(tos));
}
void
vsf_sysutil_activate_linger(int fd)
{
int retval;
struct linger the_linger;
vsf_sysutil_memclr(&the_linger, sizeof(the_linger));
the_linger.l_onoff = 1;
the_linger.l_linger = 60 * 10;
retval = setsockopt(fd, SOL_SOCKET, SO_LINGER, &the_linger,
sizeof(the_linger));
if (retval != 0)
{
die("setsockopt: linger");
}
}
void
vsf_sysutil_deactivate_linger_failok(int fd)
{
struct linger the_linger;
the_linger.l_onoff = 0;
the_linger.l_linger = 0;
(void) setsockopt(fd, SOL_SOCKET, SO_LINGER, &the_linger, sizeof(the_linger));
}
void
vsf_sysutil_activate_noblock(int fd)
{
int retval;
int curr_flags = fcntl(fd, F_GETFL);
if (vsf_sysutil_retval_is_error(curr_flags))
{
die("fcntl");
}
curr_flags |= O_NONBLOCK;
retval = fcntl(fd, F_SETFL, curr_flags);
if (retval != 0)
{
die("fcntl");
}
}
void
vsf_sysutil_deactivate_noblock(int fd)
{
int retval;
int curr_flags = fcntl(fd, F_GETFL);
if (vsf_sysutil_retval_is_error(curr_flags))
{
die("fcntl");
}
curr_flags &= ~O_NONBLOCK;
retval = fcntl(fd, F_SETFL, curr_flags);
if (retval != 0)
{
die("fcntl");
}
}
int
vsf_sysutil_recv_peek(const int fd, void* p_buf, unsigned int len)
{
while (1)
{
int retval = recv(fd, p_buf, len, MSG_PEEK);
int saved_errno = errno;
vsf_sysutil_check_pending_actions(kVSFSysUtilIO, retval, fd);
if (retval < 0 && saved_errno == EINTR)
{
continue;
}
return retval;
}
}
int
vsf_sysutil_atoi(const char* p_str)
{
return atoi(p_str);
}
filesize_t
vsf_sysutil_a_to_filesize_t(const char* p_str)
{
/* atoll() is C99 standard - but even modern FreeBSD, OpenBSD don't have
* it, so we'll supply our own
*/
filesize_t result = 0;
filesize_t mult = 1;
unsigned int len = vsf_sysutil_strlen(p_str);
unsigned int i;
/* Bail if the number is excessively big (petabytes!) */
if (len > 15)
{
return 0;
}
for (i=0; i<len; ++i)
{
char the_char = p_str[len-(i+1)];
filesize_t val;
if (the_char < '0' || the_char > '9')
{
return 0;
}
val = the_char - '0';
val *= mult;
result += val;
mult *= 10;
}
return result;
}
const char*
vsf_sysutil_ulong_to_str(unsigned long the_ulong)
{
static char ulong_buf[32];
(void) snprintf(ulong_buf, sizeof(ulong_buf), "%lu", the_ulong);
return ulong_buf;
}
const char*
vsf_sysutil_filesize_t_to_str(filesize_t the_filesize)
{
static char filesize_buf[32];
if (sizeof(long) == 8)
{
/* Avoid using non-standard %ll if we can */
(void) snprintf(filesize_buf, sizeof(filesize_buf), "%ld",
(long) the_filesize);
}
else
{
(void) snprintf(filesize_buf, sizeof(filesize_buf), "%lld", the_filesize);
}
return filesize_buf;
}
const char*
vsf_sysutil_double_to_str(double the_double)
{
static char double_buf[32];
(void) snprintf(double_buf, sizeof(double_buf), "%.2f", the_double);
return double_buf;
}
const char*
vsf_sysutil_uint_to_octal(unsigned int the_uint)
{
static char octal_buf[32];
if (the_uint == 0)
{
octal_buf[0] = '0';
octal_buf[1] = '\0';
}
else
{
(void) snprintf(octal_buf, sizeof(octal_buf), "0%o", the_uint);
}
return octal_buf;
}
unsigned int
vsf_sysutil_octal_to_uint(const char* p_str)
{
/* NOTE - avoiding using sscanf() parser */
unsigned int result = 0;
int seen_non_zero_digit = 0;
while (*p_str != '\0')
{
int digit = *p_str;
if (!isdigit(digit) || digit > '7')
{
break;
}
if (digit != '0')
{
seen_non_zero_digit = 1;
}
if (seen_non_zero_digit)
{
result <<= 3;
result += (digit - '0');
}
p_str++;
}
return result;
}
int
vsf_sysutil_toupper(int the_char)
{
return toupper((unsigned char) the_char);
}
int
vsf_sysutil_isspace(int the_char)
{
return isspace((unsigned char) the_char);
}
int
vsf_sysutil_isprint(int the_char)
{
/* From Solar - we know better than some libc's! Don't let any potential
* control chars through
*/
unsigned char uc = (unsigned char) the_char;
if (uc <= 31)
{
return 0;
}
if (uc == 177)
{
return 0;
}
if (uc >= 128 && uc <= 159)
{
return 0;
}
return isprint(the_char);
}
int
vsf_sysutil_isalnum(int the_char)
{
return isalnum((unsigned char) the_char);
}
int
vsf_sysutil_isdigit(int the_char)
{
return isdigit((unsigned char) the_char);
}
char*
vsf_sysutil_getcwd(char* p_dest, const unsigned int buf_size)
{
char* p_retval;
if (buf_size == 0) {
return p_dest;
}
p_retval = getcwd(p_dest, buf_size);
p_dest[buf_size - 1] = '\0';
return p_retval;
}
int
vsf_sysutil_mkdir(const char* p_dirname, const unsigned int mode)
{
return mkdir(p_dirname, mode);
}
int
vsf_sysutil_rmdir(const char* p_dirname)
{
return rmdir(p_dirname);
}
int
vsf_sysutil_chdir(const char* p_dirname)
{
return chdir(p_dirname);
}
int
vsf_sysutil_rename(const char* p_from, const char* p_to)
{
return rename(p_from, p_to);
}
struct vsf_sysutil_dir*
vsf_sysutil_opendir(const char* p_dirname)
{
return (struct vsf_sysutil_dir*) opendir(p_dirname);
}
void
vsf_sysutil_closedir(struct vsf_sysutil_dir* p_dir)
{
DIR* p_real_dir = (DIR*) p_dir;
int retval = closedir(p_real_dir);
if (retval != 0)
{
die("closedir");
}
}
const char*
vsf_sysutil_next_dirent(struct vsf_sysutil_dir* p_dir)
{
DIR* p_real_dir = (DIR*) p_dir;
struct dirent* p_dirent = readdir(p_real_dir);
if (p_dirent == NULL)
{
return NULL;
}
return p_dirent->d_name;
}
unsigned int
vsf_sysutil_strlen(const char* p_text)
{
size_t ret = strlen(p_text);
/* A defense in depth measure. */
if (ret > INT_MAX / 8)
{
die("string suspiciously long");
}
return (unsigned int) ret;
}
char*
vsf_sysutil_strdup(const char* p_str)
{
return strdup(p_str);
}
void
vsf_sysutil_memclr(void* p_dest, unsigned int size)
{
/* Safety */
if (size == 0)
{
return;
}
memset(p_dest, '\0', size);
}
void
vsf_sysutil_memcpy(void* p_dest, const void* p_src, const unsigned int size)
{
/* Safety */
if (size == 0)
{
return;
}
/* Defense in depth */
if (size > INT_MAX)
{
die("possible negative value to memcpy?");
}
memcpy(p_dest, p_src, size);
}
void
vsf_sysutil_strcpy(char* p_dest, const char* p_src, unsigned int maxsize)
{
if (maxsize == 0)
{
return;
}
strncpy(p_dest, p_src, maxsize);
p_dest[maxsize - 1] = '\0';
}
int
vsf_sysutil_memcmp(const void* p_src1, const void* p_src2, unsigned int size)
{
/* Safety */
if (size == 0)
{
return 0;
}
return memcmp(p_src1, p_src2, size);
}
int
vsf_sysutil_strcmp(const char* p_src1, const char* p_src2)
{
return strcmp(p_src1, p_src2);
}
unsigned int
vsf_sysutil_getpagesize(void)
{
static unsigned int s_page_size;
if (s_page_size == 0)
{
s_page_size = getpagesize();
if (s_page_size == 0)
{
die("getpagesize");
}
}
return s_page_size;
}
static int
vsf_sysutil_translate_memprot(const enum EVSFSysUtilMapPermission perm)
{
int retval = 0;
switch (perm)
{
case kVSFSysUtilMapProtReadOnly:
retval = PROT_READ;
break;
case kVSFSysUtilMapProtNone:
retval = PROT_NONE;
break;
default:
bug("bad value in vsf_sysutil_translate_memprot");
break;
}
return retval;
}
void
vsf_sysutil_memprotect(void* p_addr, unsigned int len,
const enum EVSFSysUtilMapPermission perm)
{
int prot = vsf_sysutil_translate_memprot(perm);
int retval = mprotect(p_addr, len, prot);
if (retval != 0)
{
die("mprotect");
}
}
void
vsf_sysutil_memunmap(void* p_start, unsigned int length)
{
int retval = munmap(p_start, length);
if (retval != 0)
{
die("munmap");
}
}
static int
vsf_sysutil_translate_openmode(const enum EVSFSysUtilOpenMode mode)
{
int retval = 0;
switch (mode)
{
case kVSFSysUtilOpenReadOnly:
retval = O_RDONLY;
break;
case kVSFSysUtilOpenWriteOnly:
retval = O_WRONLY;
break;
case kVSFSysUtilOpenReadWrite:
retval = O_RDWR;
break;
default:
bug("bad mode in vsf_sysutil_translate_openmode");
break;
}
return retval;
}
int
vsf_sysutil_open_file(const char* p_filename,
const enum EVSFSysUtilOpenMode mode)
{
return open(p_filename, vsf_sysutil_translate_openmode(mode) | O_NONBLOCK);
}
int
vsf_sysutil_create_file_exclusive(const char* p_filename)
{
/* umask() also contributes to end mode */
return open(p_filename, O_CREAT | O_EXCL | O_WRONLY | O_APPEND,
tunable_file_open_mode);
}
int
vsf_sysutil_create_or_open_file(const char* p_filename, unsigned int mode)
{
return open(p_filename, O_CREAT | O_WRONLY | O_NONBLOCK, mode);
}
int
vsf_sysutil_create_or_open_file_append(const char* p_filename,
unsigned int mode)
{
return open(p_filename, O_CREAT | O_WRONLY | O_NONBLOCK | O_APPEND, mode);
}
void
vsf_sysutil_dupfd2(int old_fd, int new_fd)
{
int retval;
if (old_fd == new_fd)
{
return;
}
retval = dup2(old_fd, new_fd);
if (retval != new_fd)
{
die("dup2");
}
}
void
vsf_sysutil_close(int fd)
{
while (1)
{
int retval = close(fd);
if (retval != 0)
{
if (errno == EINTR)
{
vsf_sysutil_check_pending_actions(kVSFSysUtilUnknown, 0, 0);
continue;
}
die("close");
}
return;
}
}
int
vsf_sysutil_close_failok(int fd)
{
return close(fd);
}
int
vsf_sysutil_unlink(const char* p_dead)
{
return unlink(p_dead);
}
int
vsf_sysutil_write_access(const char* p_filename)
{
int retval = access(p_filename, W_OK);
return (retval == 0);
}
static void
vsf_sysutil_alloc_statbuf(struct vsf_sysutil_statbuf** p_ptr)
{
if (*p_ptr == NULL)
{
*p_ptr = vsf_sysutil_malloc(sizeof(struct stat));
}
}
void
vsf_sysutil_fstat(int fd, struct vsf_sysutil_statbuf** p_ptr)
{
int retval;
vsf_sysutil_alloc_statbuf(p_ptr);
retval = fstat(fd, (struct stat*) (*p_ptr));
if (retval != 0)
{
die("fstat");
}
}
int
vsf_sysutil_stat(const char* p_name, struct vsf_sysutil_statbuf** p_ptr)
{
vsf_sysutil_alloc_statbuf(p_ptr);
return stat(p_name, (struct stat*) (*p_ptr));
}
int
vsf_sysutil_lstat(const char* p_name, struct vsf_sysutil_statbuf** p_ptr)
{
vsf_sysutil_alloc_statbuf(p_ptr);
return lstat(p_name, (struct stat*) (*p_ptr));
}
void
vsf_sysutil_dir_stat(const struct vsf_sysutil_dir* p_dir,
struct vsf_sysutil_statbuf** p_ptr)
{
int fd = dirfd((DIR*) p_dir);
vsf_sysutil_fstat(fd, p_ptr);
}
int
vsf_sysutil_statbuf_is_regfile(const struct vsf_sysutil_statbuf* p_stat)
{
const struct stat* p_realstat = (const struct stat*) p_stat;
return S_ISREG(p_realstat->st_mode);
}
int
vsf_sysutil_statbuf_is_symlink(const struct vsf_sysutil_statbuf* p_stat)
{
const struct stat* p_realstat = (const struct stat*) p_stat;
return S_ISLNK(p_realstat->st_mode);
}
int
vsf_sysutil_statbuf_is_socket(const struct vsf_sysutil_statbuf* p_stat)
{
const struct stat* p_realstat = (const struct stat*) p_stat;
return S_ISSOCK(p_realstat->st_mode);
}
int
vsf_sysutil_statbuf_is_dir(const struct vsf_sysutil_statbuf* p_stat)
{
const struct stat* p_realstat = (const struct stat*) p_stat;
return S_ISDIR(p_realstat->st_mode);
}
const char*
vsf_sysutil_statbuf_get_perms(const struct vsf_sysutil_statbuf* p_statbuf)
{
static char perms[11];
int i;
const struct stat* p_stat = (const struct stat*) p_statbuf;
for (i=0; i<10; i++)
{
perms[i] = '-';
}
perms[0] = '?';
switch (p_stat->st_mode & S_IFMT)
{
case S_IFREG: perms[0] = '-'; break;
case S_IFDIR: perms[0] = 'd'; break;
case S_IFLNK: perms[0] = 'l'; break;
case S_IFIFO: perms[0] = 'p'; break;
case S_IFSOCK: perms[0] = 's'; break;
case S_IFCHR: perms[0] = 'c'; break;
case S_IFBLK: perms[0] = 'b'; break;
default: break;
}
if (p_stat->st_mode & S_IRUSR) perms[1] = 'r';
if (p_stat->st_mode & S_IWUSR) perms[2] = 'w';
if (p_stat->st_mode & S_IXUSR) perms[3] = 'x';
if (p_stat->st_mode & S_IRGRP) perms[4] = 'r';
if (p_stat->st_mode & S_IWGRP) perms[5] = 'w';
if (p_stat->st_mode & S_IXGRP) perms[6] = 'x';
if (p_stat->st_mode & S_IROTH) perms[7] = 'r';
if (p_stat->st_mode & S_IWOTH) perms[8] = 'w';
if (p_stat->st_mode & S_IXOTH) perms[9] = 'x';
if (p_stat->st_mode & S_ISUID) perms[3] = (perms[3] == 'x') ? 's' : 'S';
if (p_stat->st_mode & S_ISGID) perms[6] = (perms[6] == 'x') ? 's' : 'S';
if (p_stat->st_mode & S_ISVTX) perms[9] = (perms[9] == 'x') ? 't' : 'T';
perms[10] = '\0';
return perms;
}
const char*
vsf_sysutil_statbuf_get_date(const struct vsf_sysutil_statbuf* p_statbuf,
int use_localtime, long curr_time)
{
static char datebuf[64];
int retval;
struct tm* p_tm;
const struct stat* p_stat = (const struct stat*) p_statbuf;
const char* p_date_format = "%b %d %H:%M";
if (!use_localtime)
{
p_tm = gmtime(&p_stat->st_mtime);
}
else
{
p_tm = localtime(&p_stat->st_mtime);
}
/* Is this a future or 6 months old date? If so, we drop to year format */
if (p_stat->st_mtime > curr_time ||
(curr_time - p_stat->st_mtime) > 60*60*24*182)
{
p_date_format = "%b %d %Y";
}
retval = strftime(datebuf, sizeof(datebuf), p_date_format, p_tm);
datebuf[sizeof(datebuf)-1] = '\0';
if (retval == 0)
{
die("strftime");
}
return datebuf;
}
const char*
vsf_sysutil_statbuf_get_numeric_date(
const struct vsf_sysutil_statbuf* p_statbuf,
int use_localtime)
{
static char datebuf[15];
const struct stat* p_stat = (const struct stat*) p_statbuf;
struct tm* p_tm;
int retval;
if (!use_localtime)
{
p_tm = gmtime(&p_stat->st_mtime);
}
else
{
p_tm = localtime(&p_stat->st_mtime);
}
retval = strftime(datebuf, sizeof(datebuf), "%Y%m%d%H%M%S", p_tm);
if (retval == 0)
{
die("strftime");
}
return datebuf;
}
filesize_t
vsf_sysutil_statbuf_get_size(const struct vsf_sysutil_statbuf* p_statbuf)
{
const struct stat* p_stat = (const struct stat*) p_statbuf;
if (p_stat->st_size < 0)
{
die("invalid inode size in vsf_sysutil_statbuf_get_size");
}
return p_stat->st_size;
}
int
vsf_sysutil_statbuf_get_uid(const struct vsf_sysutil_statbuf* p_statbuf)
{
const struct stat* p_stat = (const struct stat*) p_statbuf;
return p_stat->st_uid;
}
int
vsf_sysutil_statbuf_get_gid(const struct vsf_sysutil_statbuf* p_statbuf)
{
const struct stat* p_stat = (const struct stat*) p_statbuf;
return p_stat->st_gid;
}
unsigned int
vsf_sysutil_statbuf_get_links(const struct vsf_sysutil_statbuf* p_statbuf)
{
const struct stat* p_stat = (const struct stat*) p_statbuf;
return p_stat->st_nlink;
}
int
vsf_sysutil_statbuf_is_readable_other(
const struct vsf_sysutil_statbuf* p_statbuf)
{
const struct stat* p_stat = (const struct stat*) p_statbuf;
if (p_stat->st_mode & S_IROTH)
{
return 1;
}
return 0;
}
const char*
vsf_sysutil_statbuf_get_sortkey_mtime(
const struct vsf_sysutil_statbuf* p_statbuf)
{
static char intbuf[32];
const struct stat* p_stat = (const struct stat*) p_statbuf;
/* This slight hack function must return a character date format such that
* more recent dates appear later in the alphabet! Most notably, we must
* make sure we pad to the same length with 0's
*/
snprintf(intbuf, sizeof(intbuf), "%030ld", (long) p_stat->st_mtime);
return intbuf;
}
void
vsf_sysutil_fchown(const int fd, const int uid, const int gid)
{
if (fchown(fd, uid, gid) != 0)
{
die("fchown");
}
}
void
vsf_sysutil_fchmod(const int fd, unsigned int mode)
{
mode = mode & 0777;
if (fchmod(fd, mode))
{
die("fchmod");
}
}
int
vsf_sysutil_chmod(const char* p_filename, unsigned int mode)
{
/* Safety: mask "mode" to just access permissions, e.g. no suid setting! */
mode = mode & 0777;
return chmod(p_filename, mode);
}
int
vsf_sysutil_lock_file_write(int fd)
{
return lock_internal(fd, F_WRLCK);
}
int
vsf_sysutil_lock_file_read(int fd)
{
return lock_internal(fd, F_RDLCK);
}
static int
lock_internal(int fd, int lock_type)
{
struct flock the_lock;
int retval;
int saved_errno;
vsf_sysutil_memclr(&the_lock, sizeof(the_lock));
the_lock.l_type = lock_type;
the_lock.l_whence = SEEK_SET;
the_lock.l_start = 0;
the_lock.l_len = 0;
do
{
retval = fcntl(fd, F_SETLKW, &the_lock);
saved_errno = errno;
vsf_sysutil_check_pending_actions(kVSFSysUtilUnknown, 0, 0);
}
while (retval < 0 && saved_errno == EINTR);
return retval;
}
void
vsf_sysutil_unlock_file(int fd)
{
int retval;
struct flock the_lock;
vsf_sysutil_memclr(&the_lock, sizeof(the_lock));
the_lock.l_type = F_UNLCK;
the_lock.l_whence = SEEK_SET;
the_lock.l_start = 0;
the_lock.l_len = 0;
retval = fcntl(fd, F_SETLK, &the_lock);
if (retval != 0)
{
die("fcntl");
}
}
int
vsf_sysutil_readlink(const char* p_filename, char* p_dest, unsigned int bufsiz)
{
int retval;
if (bufsiz == 0) {
return -1;
}
retval = readlink(p_filename, p_dest, bufsiz - 1);
if (retval < 0)
{
return retval;
}
/* Ensure buffer is NULL terminated; readlink(2) doesn't do that */
p_dest[retval] = '\0';
return retval;
}
int
vsf_sysutil_retval_is_error(int retval)
{
if (retval < 0)
{
return 1;
}
return 0;
}
enum EVSFSysUtilError
vsf_sysutil_get_error(void)
{
enum EVSFSysUtilError retval = kVSFSysUtilErrUnknown;
switch (errno)
{
case EADDRINUSE:
retval = kVSFSysUtilErrADDRINUSE;
break;
case ENOSYS:
retval = kVSFSysUtilErrNOSYS;
break;
case EINTR:
retval = kVSFSysUtilErrINTR;
break;
case EINVAL:
retval = kVSFSysUtilErrINVAL;
break;
case EOPNOTSUPP:
retval = kVSFSysUtilErrOPNOTSUPP;
break;
case EACCES:
retval = kVSFSysUtilErrACCES;
break;
case ENOENT:
retval = kVSFSysUtilErrNOENT;
break;
default:
break;
}
return retval;
}
int
vsf_sysutil_get_ipv4_sock(void)
{
int retval = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP);
if (retval < 0)
{
die("socket");
}
return retval;
}
int
vsf_sysutil_get_ipv6_sock(void)
{
int retval = socket(PF_INET6, SOCK_STREAM, IPPROTO_TCP);
if (retval < 0)
{
die("socket");
}
return retval;
}
struct vsf_sysutil_socketpair_retval
vsf_sysutil_unix_stream_socketpair(void)
{
struct vsf_sysutil_socketpair_retval retval;
int the_sockets[2];
int sys_retval = socketpair(PF_UNIX, SOCK_STREAM, 0, the_sockets);
if (sys_retval != 0)
{
die("socketpair");
}
retval.socket_one = the_sockets[0];
retval.socket_two = the_sockets[1];
return retval;
}
int
vsf_sysutil_bind(int fd, const struct vsf_sysutil_sockaddr* p_sockptr)
{
const struct sockaddr* p_sockaddr = &p_sockptr->u.u_sockaddr;
int len = 0;
if (p_sockaddr->sa_family == AF_INET)
{
len = sizeof(struct sockaddr_in);
}
else if (p_sockaddr->sa_family == AF_INET6)
{
len = sizeof(struct sockaddr_in6);
}
else
{
die("can only support ipv4 and ipv6 currently");
}
return bind(fd, p_sockaddr, len);
}
int
vsf_sysutil_listen(int fd, const unsigned int backlog)
{
int retval = listen(fd, backlog);
if (vsf_sysutil_retval_is_error(retval) &&
vsf_sysutil_get_error() != kVSFSysUtilErrADDRINUSE)
{
die("listen");
}
return retval;
}
/* Warning: callers of this function assume it does NOT make use of any
* non re-entrant calls such as malloc().
*/
int
vsf_sysutil_accept_timeout(int fd, struct vsf_sysutil_sockaddr* p_sockaddr,
unsigned int wait_seconds)
{
struct vsf_sysutil_sockaddr remote_addr;
int retval;
int saved_errno;
fd_set accept_fdset;
struct timeval timeout;
socklen_t socklen = sizeof(remote_addr);
if (p_sockaddr)
{
vsf_sysutil_memclr(p_sockaddr, sizeof(*p_sockaddr));
}
if (wait_seconds > 0)
{
FD_ZERO(&accept_fdset);
FD_SET(fd, &accept_fdset);
timeout.tv_sec = wait_seconds;
timeout.tv_usec = 0;
do
{
retval = select(fd + 1, &accept_fdset, NULL, NULL, &timeout);
saved_errno = errno;
vsf_sysutil_check_pending_actions(kVSFSysUtilUnknown, 0, 0);
}
while (retval < 0 && saved_errno == EINTR);
if (retval <= 0)
{
if (retval == 0)
{
errno = EAGAIN;
}
return -1;
}
}
retval = accept(fd, &remote_addr.u.u_sockaddr, &socklen);
vsf_sysutil_check_pending_actions(kVSFSysUtilUnknown, 0, 0);
if (retval < 0)
{
return retval;
}
/* FreeBSD bug / paranoia: 该邮件地址已受到反垃圾邮件插件保护。要显示它需要在浏览器中启用 JavaScript。 */
if (socklen == 0)
{
return -1;
}
if (remote_addr.u.u_sockaddr.sa_family != AF_INET &&
remote_addr.u.u_sockaddr.sa_family != AF_INET6)
{
die("can only support ipv4 and ipv6 currently");
}
if (p_sockaddr)
{
if (remote_addr.u.u_sockaddr.sa_family == AF_INET)
{
vsf_sysutil_memclr(&remote_addr.u.u_sockaddr_in.sin_zero,
sizeof(remote_addr.u.u_sockaddr_in.sin_zero));
vsf_sysutil_memcpy(p_sockaddr, &remote_addr.u.u_sockaddr_in,
sizeof(remote_addr.u.u_sockaddr_in));
}
else
{
vsf_sysutil_memcpy(p_sockaddr, &remote_addr.u.u_sockaddr_in6,
sizeof(remote_addr.u.u_sockaddr_in6));
}
}
return retval;
}
int
vsf_sysutil_connect_timeout(int fd, const struct vsf_sysutil_sockaddr* p_addr,
unsigned int wait_seconds)
{
const struct sockaddr* p_sockaddr = &p_addr->u.u_sockaddr;
unsigned int addrlen = 0;
int retval;
int saved_errno;
if (p_sockaddr->sa_family == AF_INET)
{
addrlen = sizeof(p_addr->u.u_sockaddr_in);
}
else if (p_sockaddr->sa_family == AF_INET6)
{
addrlen = sizeof(p_addr->u.u_sockaddr_in6);
}
else
{
die("can only support ipv4 and ipv6 currently");
}
if (wait_seconds > 0)
{
vsf_sysutil_activate_noblock(fd);
}
retval = connect(fd, p_sockaddr, addrlen);
if (retval < 0 && errno == EINPROGRESS)
{
fd_set connect_fdset;
struct timeval timeout;
FD_ZERO(&connect_fdset);
FD_SET(fd, &connect_fdset);
timeout.tv_sec = wait_seconds;
timeout.tv_usec = 0;
do
{
retval = select(fd + 1, NULL, &connect_fdset, NULL, &timeout);
saved_errno = errno;
vsf_sysutil_check_pending_actions(kVSFSysUtilUnknown, 0, 0);
}
while (retval < 0 && saved_errno == EINTR);
if (retval <= 0)
{
if (retval == 0)
{
errno = EAGAIN;
}
retval = -1;
}
else
{
socklen_t socklen = sizeof(retval);
int sockoptret = getsockopt(fd, SOL_SOCKET, SO_ERROR, &retval, &socklen);
if (sockoptret != 0)
{
die("getsockopt");
}
if (retval != 0)
{
errno = retval;
retval = -1;
}
}
}
if (wait_seconds > 0)
{
vsf_sysutil_deactivate_noblock(fd);
}
return retval;
}
void
vsf_sysutil_getsockname(int fd, struct vsf_sysutil_sockaddr** p_sockptr)
{
struct vsf_sysutil_sockaddr the_addr;
int retval;
socklen_t socklen = sizeof(the_addr);
vsf_sysutil_sockaddr_clear(p_sockptr);
retval = getsockname(fd, &the_addr.u.u_sockaddr, &socklen);
if (retval != 0)
{
die("getsockname");
}
if (the_addr.u.u_sockaddr.sa_family != AF_INET &&
the_addr.u.u_sockaddr.sa_family != AF_INET6)
{
die("can only support ipv4 and ipv6 currently");
}
vsf_sysutil_sockaddr_alloc(p_sockptr);
if (socklen > sizeof(the_addr))
{
socklen = sizeof(the_addr);
}
vsf_sysutil_memcpy(*p_sockptr, &the_addr, socklen);
}
void
vsf_sysutil_getpeername(int fd, struct vsf_sysutil_sockaddr** p_sockptr)
{
struct vsf_sysutil_sockaddr the_addr;
int retval;
socklen_t socklen = sizeof(the_addr);
vsf_sysutil_sockaddr_clear(p_sockptr);
retval = getpeername(fd, &the_addr.u.u_sockaddr, &socklen);
if (retval != 0)
{
die("getpeername");
}
if (the_addr.u.u_sockaddr.sa_family != AF_INET &&
the_addr.u.u_sockaddr.sa_family != AF_INET6)
{
die("can only support ipv4 and ipv6 currently");
}
vsf_sysutil_sockaddr_alloc(p_sockptr);
if (socklen > sizeof(the_addr))
{
socklen = sizeof(the_addr);
}
vsf_sysutil_memcpy(*p_sockptr, &the_addr, socklen);
}
void
vsf_sysutil_shutdown_failok(int fd)
{
/* SHUT_RDWR is a relatively new addition */
#ifndef SHUT_RDWR
#define SHUT_RDWR 2
#endif
(void) shutdown(fd, SHUT_RDWR);
}
void
vsf_sysutil_shutdown_read_failok(int fd)
{
/* SHUT_RD is a relatively new addition */
#ifndef SHUT_RD
#define SHUT_RD 0
#endif
(void) shutdown(fd, SHUT_RD);
}
void
vsf_sysutil_sockaddr_clear(struct vsf_sysutil_sockaddr** p_sockptr)
{
if (*p_sockptr != NULL)
{
vsf_sysutil_free(*p_sockptr);
*p_sockptr = NULL;
}
}
void
vsf_sysutil_sockaddr_alloc(struct vsf_sysutil_sockaddr** p_sockptr)
{
vsf_sysutil_sockaddr_clear(p_sockptr);
*p_sockptr = vsf_sysutil_malloc(sizeof(**p_sockptr));
vsf_sysutil_memclr(*p_sockptr, sizeof(**p_sockptr));
}
void
vsf_sysutil_sockaddr_alloc_ipv4(struct vsf_sysutil_sockaddr** p_sockptr)
{
vsf_sysutil_sockaddr_alloc(p_sockptr);
(*p_sockptr)->u.u_sockaddr.sa_family = AF_INET;
}
void
vsf_sysutil_sockaddr_alloc_ipv6(struct vsf_sysutil_sockaddr** p_sockptr)
{
vsf_sysutil_sockaddr_alloc(p_sockptr);
(*p_sockptr)->u.u_sockaddr.sa_family = AF_INET6;
}
void
vsf_sysutil_sockaddr_clone(struct vsf_sysutil_sockaddr** p_sockptr,
const struct vsf_sysutil_sockaddr* p_src)
{
struct vsf_sysutil_sockaddr* p_sockaddr = 0;
vsf_sysutil_sockaddr_alloc(p_sockptr);
p_sockaddr = *p_sockptr;
if (p_src->u.u_sockaddr.sa_family == AF_INET)
{
p_sockaddr->u.u_sockaddr.sa_family = AF_INET;
vsf_sysutil_memcpy(&p_sockaddr->u.u_sockaddr_in.sin_addr,
&p_src->u.u_sockaddr_in.sin_addr,
sizeof(p_sockaddr->u.u_sockaddr_in.sin_addr));
}
else if (p_src->u.u_sockaddr.sa_family == AF_INET6)
{
p_sockaddr->u.u_sockaddr.sa_family = AF_INET6;
vsf_sysutil_memcpy(&p_sockaddr->u.u_sockaddr_in6.sin6_addr,
&p_src->u.u_sockaddr_in6.sin6_addr,
sizeof(p_sockaddr->u.u_sockaddr_in6.sin6_addr));
p_sockaddr->u.u_sockaddr_in6.sin6_scope_id =
p_src->u.u_sockaddr_in6.sin6_scope_id;
}
else
{
die("can only support ipv4 and ipv6 currently");
}
}
int
vsf_sysutil_sockaddr_addr_equal(const struct vsf_sysutil_sockaddr* p1,
const struct vsf_sysutil_sockaddr* p2)
{
int family1 = p1->u.u_sockaddr.sa_family;
int family2 = p2->u.u_sockaddr.sa_family;
if (family1 != family2)
{
if (family1 == AF_INET && family2 == AF_INET6)
{
const void* p_ipv4_addr = vsf_sysutil_sockaddr_ipv6_v4(p2);
if (p_ipv4_addr &&
!vsf_sysutil_memcmp(p_ipv4_addr, &p1->u.u_sockaddr_in.sin_addr,
sizeof(p1->u.u_sockaddr_in.sin_addr)))
{
return 1;
}
}
else if (family1 == AF_INET6 && family2 == AF_INET)
{
const void* p_ipv4_addr = vsf_sysutil_sockaddr_ipv6_v4(p1);
if (p_ipv4_addr &&
!vsf_sysutil_memcmp(p_ipv4_addr, &p2->u.u_sockaddr_in.sin_addr,
sizeof(p2->u.u_sockaddr_in.sin_addr)))
{
return 1;
}
}
return 0;
}
if (family1 == AF_INET)
{
if (vsf_sysutil_memcmp(&p1->u.u_sockaddr_in.sin_addr,
&p2->u.u_sockaddr_in.sin_addr,
sizeof(p1->u.u_sockaddr_in.sin_addr)) == 0)
{
return 1;
}
}
else if (family1 == AF_INET6)
{
if (vsf_sysutil_memcmp(&p1->u.u_sockaddr_in6.sin6_addr,
&p2->u.u_sockaddr_in6.sin6_addr,
sizeof(p1->u.u_sockaddr_in6.sin6_addr)) == 0)
{
return 1;
}
}
return 0;
}
int
vsf_sysutil_sockaddr_is_ipv6(const struct vsf_sysutil_sockaddr* p_sockaddr)
{
if (p_sockaddr->u.u_sockaddr.sa_family == AF_INET6)
{
return 1;
}
return 0;
}
void
vsf_sysutil_sockaddr_set_ipv4addr(struct vsf_sysutil_sockaddr* p_sockptr,
const unsigned char* p_raw)
{
if (p_sockptr->u.u_sockaddr.sa_family == AF_INET)
{
vsf_sysutil_memcpy(&p_sockptr->u.u_sockaddr_in.sin_addr, p_raw,
sizeof(p_sockptr->u.u_sockaddr_in.sin_addr));
}
else if (p_sockptr->u.u_sockaddr.sa_family == AF_INET6)
{
static struct vsf_sysutil_sockaddr* s_p_sockaddr;
vsf_sysutil_sockaddr_alloc_ipv4(&s_p_sockaddr);
vsf_sysutil_memcpy(&s_p_sockaddr->u.u_sockaddr_in.sin_addr, p_raw,
sizeof(s_p_sockaddr->u.u_sockaddr_in.sin_addr));
vsf_sysutil_memcpy(&p_sockptr->u.u_sockaddr_in6.sin6_addr,
vsf_sysutil_sockaddr_ipv4_v6(s_p_sockaddr),
sizeof(p_sockptr->u.u_sockaddr_in6.sin6_addr));
}
else
{
bug("bad family");
}
}
void
vsf_sysutil_sockaddr_set_ipv6addr(struct vsf_sysutil_sockaddr* p_sockptr,
const unsigned char* p_raw)
{
if (p_sockptr->u.u_sockaddr.sa_family == AF_INET6)
{
vsf_sysutil_memcpy(&p_sockptr->u.u_sockaddr_in6.sin6_addr, p_raw,
sizeof(p_sockptr->u.u_sockaddr_in6.sin6_addr));
}
else
{
bug("bad family");
}
}
const void*
vsf_sysutil_sockaddr_ipv6_v4(const struct vsf_sysutil_sockaddr* p_addr)
{
static unsigned char pattern[12] =
{ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0xFF, 0xFF };
const unsigned char* p_addr_start;
if (p_addr->u.u_sockaddr.sa_family != AF_INET6)
{
return 0;
}
if (vsf_sysutil_memcmp(pattern, &p_addr->u.u_sockaddr_in6.sin6_addr, 12))
{
return 0;
}
p_addr_start = (const unsigned char*)&p_addr->u.u_sockaddr_in6.sin6_addr;
return &p_addr_start[12];
}
const void*
vsf_sysutil_sockaddr_ipv4_v6(const struct vsf_sysutil_sockaddr* p_addr)
{
static unsigned char ret[16] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0xFF, 0xFF };
if (p_addr->u.u_sockaddr.sa_family != AF_INET)
{
return 0;
}
vsf_sysutil_memcpy(&ret[12], &p_addr->u.u_sockaddr_in.sin_addr, 4);
return ret;
}
void*
vsf_sysutil_sockaddr_get_raw_addr(struct vsf_sysutil_sockaddr* p_sockptr)
{
if (p_sockptr->u.u_sockaddr.sa_family == AF_INET)
{
return &p_sockptr->u.u_sockaddr_in.sin_addr;
}
else if (p_sockptr->u.u_sockaddr.sa_family == AF_INET6)
{
return &p_sockptr->u.u_sockaddr_in6.sin6_addr;
}
else
{
bug("bad family");
}
return 0;
}
unsigned int
vsf_sysutil_get_ipaddr_size(void)
{
struct vsf_sysutil_sockaddr addr;
unsigned int size = sizeof(addr.u.u_sockaddr_in.sin_addr);
unsigned int size2 = sizeof(addr.u.u_sockaddr_in6.sin6_addr);
if (size2 > size)
{
size = size2;
}
return size;
}
int
vsf_sysutil_get_ipsock(const struct vsf_sysutil_sockaddr* p_addr)
{
if (p_addr->u.u_sockaddr.sa_family == AF_INET)
{
return vsf_sysutil_get_ipv4_sock();
}
else if (p_addr->u.u_sockaddr.sa_family == AF_INET6)
{
return vsf_sysutil_get_ipv6_sock();
}
else
{
bug("bad family");
}
return -1;
}
void
vsf_sysutil_sockaddr_set_any(struct vsf_sysutil_sockaddr* p_sockaddr)
{
if (p_sockaddr->u.u_sockaddr.sa_family == AF_INET)
{
vsf_sysutil_memclr(&p_sockaddr->u.u_sockaddr_in.sin_addr,
sizeof(p_sockaddr->u.u_sockaddr_in.sin_addr));
}
else if (p_sockaddr->u.u_sockaddr.sa_family == AF_INET6)
{
vsf_sysutil_memclr(&p_sockaddr->u.u_sockaddr_in6.sin6_addr,
sizeof(p_sockaddr->u.u_sockaddr_in6.sin6_addr));
}
else
{
bug("bad family");
}
}
unsigned short
vsf_sysutil_sockaddr_get_port(const struct vsf_sysutil_sockaddr* p_sockptr)
{
if (p_sockptr->u.u_sockaddr.sa_family == AF_INET)
{
return ntohs(p_sockptr->u.u_sockaddr_in.sin_port);
}
else if (p_sockptr->u.u_sockaddr.sa_family == AF_INET6)
{
return ntohs(p_sockptr->u.u_sockaddr_in6.sin6_port);
}
else
{
bug("bad family");
}
/* NOTREACHED */
return 0;
}
void
vsf_sysutil_sockaddr_set_port(struct vsf_sysutil_sockaddr* p_sockptr,
unsigned short the_port)
{
if (p_sockptr->u.u_sockaddr.sa_family == AF_INET)
{
p_sockptr->u.u_sockaddr_in.sin_port = htons(the_port);
}
else if (p_sockptr->u.u_sockaddr.sa_family == AF_INET6)
{
p_sockptr->u.u_sockaddr_in6.sin6_port = htons(the_port);
}
else
{
bug("bad family");
}
}
int
vsf_sysutil_is_port_reserved(unsigned short the_port)
{
if (the_port < IPPORT_RESERVED)
{
return 1;
}
return 0;
}
const char*
vsf_sysutil_inet_ntop(const struct vsf_sysutil_sockaddr* p_sockptr)
{
const struct sockaddr* p_sockaddr = &p_sockptr->u.u_sockaddr;
if (p_sockaddr->sa_family == AF_INET)
{
return inet_ntoa(p_sockptr->u.u_sockaddr_in.sin_addr);
}
else if (p_sockaddr->sa_family == AF_INET6)
{
static char inaddr_buf[64];
const char* p_ret = inet_ntop(AF_INET6,
&p_sockptr->u.u_sockaddr_in6.sin6_addr,
inaddr_buf, sizeof(inaddr_buf));
inaddr_buf[sizeof(inaddr_buf) - 1] = '\0';
if (p_ret == NULL)
{
inaddr_buf[0] = '\0';
}
return inaddr_buf;
}
else
{
die("can only support ipv4 and ipv6 currently");
return 0;
}
}
const char*
vsf_sysutil_inet_ntoa(const void* p_raw_addr)
{
return inet_ntoa(*((struct in_addr*)p_raw_addr));
}
int
vsf_sysutil_inet_aton(const char* p_text, struct vsf_sysutil_sockaddr* p_addr)
{
struct in_addr sin_addr;
if (p_addr->u.u_sockaddr.sa_family != AF_INET)
{
bug("bad family");
}
if (inet_aton(p_text, &sin_addr))
{
vsf_sysutil_memcpy(&p_addr->u.u_sockaddr_in.sin_addr,
&sin_addr, sizeof(p_addr->u.u_sockaddr_in.sin_addr));
return 1;
}
else
{
return 0;
}
}
void
vsf_sysutil_dns_resolve(struct vsf_sysutil_sockaddr** p_sockptr,
const char* p_name)
{
struct hostent* hent = gethostbyname(p_name);
if (hent == NULL)
{
die2("cannot resolve host:", p_name);
}
vsf_sysutil_sockaddr_clear(p_sockptr);
if (hent->h_addrtype == AF_INET)
{
unsigned int len = hent->h_length;
if (len > sizeof((*p_sockptr)->u.u_sockaddr_in.sin_addr))
{
len = sizeof((*p_sockptr)->u.u_sockaddr_in.sin_addr);
}
vsf_sysutil_sockaddr_alloc_ipv4(p_sockptr);
vsf_sysutil_memcpy(&(*p_sockptr)->u.u_sockaddr_in.sin_addr,
hent->h_addr_list[0], len);
}
else if (hent->h_addrtype == AF_INET6)
{
unsigned int len = hent->h_length;
if (len > sizeof((*p_sockptr)->u.u_sockaddr_in6.sin6_addr))
{
len = sizeof((*p_sockptr)->u.u_sockaddr_in6.sin6_addr);
}
vsf_sysutil_sockaddr_alloc_ipv6(p_sockptr);
vsf_sysutil_memcpy(&(*p_sockptr)->u.u_sockaddr_in6.sin6_addr,
hent->h_addr_list[0], len);
}
else
{
die("gethostbyname(): neither IPv4 nor IPv6");
}
}
struct vsf_sysutil_user*
vsf_sysutil_getpwuid(const int uid)
{
if (uid < 0)
{
bug("negative uid in vsf_sysutil_getpwuid");
}
return (struct vsf_sysutil_user*) getpwuid((unsigned int) uid);
}
struct vsf_sysutil_user*
vsf_sysutil_getpwnam(const char* p_user)
{
return (struct vsf_sysutil_user*) getpwnam(p_user);
}
const char*
vsf_sysutil_user_getname(const struct vsf_sysutil_user* p_user)
{
const struct passwd* p_passwd = (const struct passwd*) p_user;
return p_passwd->pw_name;
}
const char*
vsf_sysutil_user_get_homedir(const struct vsf_sysutil_user* p_user)
{
const struct passwd* p_passwd = (const struct passwd*) p_user;
return p_passwd->pw_dir;
}
int
vsf_sysutil_user_getuid(const struct vsf_sysutil_user* p_user)
{
const struct passwd* p_passwd = (const struct passwd*) p_user;
return p_passwd->pw_uid;
}
int
vsf_sysutil_user_getgid(const struct vsf_sysutil_user* p_user)
{
const struct passwd* p_passwd = (const struct passwd*) p_user;
return p_passwd->pw_gid;
}
struct vsf_sysutil_group*
vsf_sysutil_getgrgid(const int gid)
{
if (gid < 0)
{
die("negative gid in vsf_sysutil_getgrgid");
}
return (struct vsf_sysutil_group*) getgrgid((unsigned int) gid);
}
const char*
vsf_sysutil_group_getname(const struct vsf_sysutil_group* p_group)
{
const struct group* p_grp = (const struct group*) p_group;
return p_grp->gr_name;
}
unsigned char
vsf_sysutil_get_random_byte(void)
{
static int seeded;
unsigned int uint_res;
unsigned char c1, c2, c3, c4;
if (!seeded)
{
struct timeval tv;
int retval = gettimeofday(&tv, NULL);
if (retval != 0)
{
die("gettimeofday");
}
srand((unsigned)tv.tv_usec);
seeded = 1;
}
uint_res = rand();
c1 = uint_res & 0x000000ff;
c2 = (uint_res >> 8) & 0x000000ff;
c3 = (uint_res >> 16) & 0x000000ff;
c4 = (uint_res >> 24) & 0x000000ff;
return c1 ^ c2 ^ c3 ^ c4;
}
int
vsf_sysutil_running_as_root(void)
{
return (getuid() == 0);
}
void
vsf_sysutil_setuid(const struct vsf_sysutil_user* p_user)
{
const struct passwd* p_passwd = (const struct passwd*) p_user;
vsf_sysutil_setuid_numeric(p_passwd->pw_uid);
}
void
vsf_sysutil_setuid_numeric(int uid)
{
int retval = setuid(uid);
if (retval != 0)
{
die("setuid");
}
}
void
vsf_sysutil_setgid(const struct vsf_sysutil_user* p_user)
{
const struct passwd* p_passwd = (const struct passwd*) p_user;
vsf_sysutil_setgid_numeric(p_passwd->pw_gid);
}
void
vsf_sysutil_setgid_numeric(int gid)
{
int retval = setgid(gid);
if (retval != 0)
{
die("setgid");
}
}
int
vsf_sysutil_geteuid(void)
{
int retval = geteuid();
if (retval < 0)
{
die("geteuid");
}
return retval;
}
int
vsf_sysutil_getegid(void)
{
int retval = getegid();
if (retval < 0)
{
die("getegid");
}
return retval;
}
void
vsf_sysutil_seteuid(const struct vsf_sysutil_user* p_user)
{
const struct passwd* p_passwd = (const struct passwd*) p_user;
vsf_sysutil_seteuid_numeric(p_passwd->pw_uid);
}
void
vsf_sysutil_setegid(const struct vsf_sysutil_user* p_user)
{
const struct passwd* p_passwd = (const struct passwd*) p_user;
vsf_sysutil_setegid_numeric(p_passwd->pw_gid);
}
void
vsf_sysutil_seteuid_numeric(int uid)
{
/* setreuid() would seem to be more portable than seteuid() */
int retval = setreuid(-1, uid);
if (retval != 0)
{
die("seteuid");
}
}
void
vsf_sysutil_setegid_numeric(int gid)
{
/* setregid() would seem to be more portable than setegid() */
int retval = setregid(-1, gid);
if (retval != 0)
{
die("setegid");
}
}
void
vsf_sysutil_clear_supp_groups(void)
{
int retval = setgroups(0, NULL);
if (retval != 0)
{
die("setgroups");
}
}
void
vsf_sysutil_initgroups(const struct vsf_sysutil_user* p_user)
{
const struct passwd* p_passwd = (const struct passwd*) p_user;
int retval = initgroups(p_passwd->pw_name, p_passwd->pw_gid);
if (retval != 0)
{
die("initgroups");
}
}
void
vsf_sysutil_chroot(const char* p_root_path)
{
int retval = chroot(p_root_path);
if (retval != 0)
{
die("chroot");
}
}
unsigned int
vsf_sysutil_get_umask(void)
{
return s_current_umask;
}
void
vsf_sysutil_set_umask(unsigned int new_umask)
{
s_current_umask = (new_umask & 0777);
(void) umask(s_current_umask);
}
void
vsf_sysutil_make_session_leader(void)
{
/* This makes us the leader if we are not already */
(void) setsid();
/* Check we're the leader */
if ((int) vsf_sysutil_getpid() != getpgrp())
{
die("not session leader");
}
}
void
vsf_sysutil_reopen_standard_fds(void)
{
/* This reopens STDIN, STDOUT and STDERR to /dev/null */
int fd;
if ((fd = open("/dev/null", O_RDWR, 0)) < 0)
{
goto error;
}
vsf_sysutil_dupfd2(fd, STDIN_FILENO);
vsf_sysutil_dupfd2(fd, STDOUT_FILENO);
vsf_sysutil_dupfd2(fd, STDERR_FILENO);
if ( fd > 2 )
{
vsf_sysutil_close(fd);
}
return;
error:
die("reopening standard file descriptors to /dev/null failed");
}
void
vsf_sysutil_tzset(void)
{
int retval;
char tzbuf[sizeof("+HHMM!")];
time_t the_time = time(NULL);
struct tm* p_tm;
tzset();
p_tm = localtime(&the_time);
if (p_tm == NULL)
{
die("localtime");
}
/* Set our timezone in the TZ environment variable to cater for the fact
* that modern glibc does not cache /etc/localtime (which becomes inaccessible
* when we chroot().
*/
retval = strftime(tzbuf, sizeof(tzbuf), "%z", p_tm);
tzbuf[sizeof(tzbuf) - 1] = '\0';
if (retval == 5)
{
/* Static because putenv() does not copy the string. */
static char envtz[sizeof("TZ=UTC-hh:mm")];
/* Insert a colon so we have e.g. -05:00 instead of -0500 */
tzbuf[5] = tzbuf[4];
tzbuf[4] = tzbuf[3];
tzbuf[3] = ':';
/* Invert the sign - we just got the offset _from_ UTC but for TZ, we need
* the offset _to_ UTC.
*/
if (tzbuf[0] == '+')
{
tzbuf[0] = '-';
}
else
{
tzbuf[0] = '+';
}
snprintf(envtz, sizeof(envtz), "TZ=UTC%s", tzbuf);
putenv(envtz);
s_timezone = ((tzbuf[1] - '0') * 10 + (tzbuf[2] - '0')) * 60 * 60;
s_timezone += ((tzbuf[4] - '0') * 10 + (tzbuf[5] - '0')) * 60;
if (tzbuf[0] == '-')
{
s_timezone *= -1;
}
}
/* Call in to the time subsystem again now that TZ is set, trying to force
* caching of the actual zoneinfo for the timezone.
*/
p_tm = localtime(&the_time);
if (p_tm == NULL)
{
die("localtime #2");
}
p_tm = gmtime(&the_time);
if (p_tm == NULL)
{
die("gmtime");
}
}
const char*
vsf_sysutil_get_current_date(void)
{
static char datebuf[64];
time_t curr_time;
const struct tm* p_tm;
int i = 0;
curr_time = vsf_sysutil_get_time_sec();
p_tm = localtime(&curr_time);
if (strftime(datebuf, sizeof(datebuf), "%a %b!%d %H:%M:%S %Y", p_tm) == 0)
{
die("strftime");
}
datebuf[sizeof(datebuf) - 1] = '\0';
/* This hack is because %e in strftime() isn't so portable */
while (datebuf[i] != '!' && datebuf[i] != '\0')
{
++i;
}
if (datebuf[i] == '!')
{
datebuf[i] = ' ';
if (datebuf[i+1] == '0')
{
datebuf[i+1] = ' ';
}
}
return datebuf;
}
long
vsf_sysutil_get_time_sec(void)
{
if (gettimeofday(&s_current_time, NULL) != 0)
{
die("gettimeofday");
}
return s_current_time.tv_sec;
}
long
vsf_sysutil_get_time_usec(void)
{
return s_current_time.tv_usec;
}
void
vsf_sysutil_qsort(void* p_base, unsigned int num_elem, unsigned int elem_size,
int (*p_compar)(const void *, const void *))
{
qsort(p_base, num_elem, elem_size, p_compar);
}
void
vsf_sysutil_sleep(double seconds)
{
int retval;
int saved_errno;
double fractional;
time_t secs;
struct timespec ts;
secs = (time_t) seconds;
fractional = seconds - (double) secs;
ts.tv_sec = secs;
ts.tv_nsec = (long) (fractional * (double) 1000000000);
do
{
retval = nanosleep(&ts, &ts);
saved_errno = errno;
vsf_sysutil_check_pending_actions(kVSFSysUtilUnknown, 0, 0);
} while (retval == -1 && saved_errno == EINTR);
}
char*
vsf_sysutil_getenv(const char* p_var)
{
return getenv(p_var);
}
void
vsf_sysutil_openlog(int force)
{
int facility = LOG_DAEMON;
int option = LOG_PID;
if (!force)
{
option |= LOG_NDELAY;
}
#ifdef LOG_FTP
facility = LOG_FTP;
#endif
openlog("vsftpd", option, facility);
}
void
vsf_sysutil_closelog(void)
{
closelog();
}
void
vsf_sysutil_syslog(const char* p_text, int severe)
{
int prio = LOG_INFO;
if (severe)
{
prio = LOG_WARNING;
}
syslog(prio, "%s", p_text);
}
long
vsf_sysutil_parse_time(const char* p_text)
{
struct tm the_time;
unsigned int len = vsf_sysutil_strlen(p_text);
vsf_sysutil_memclr(&the_time, sizeof(the_time));
if (len >= 8)
{
char yr[5];
char mon[3];
char day[3];
vsf_sysutil_strcpy(yr, p_text, 5);
vsf_sysutil_strcpy(mon, p_text + 4, 3);
vsf_sysutil_strcpy(day, p_text + 6, 3);
the_time.tm_year = vsf_sysutil_atoi(yr) - 1900;
the_time.tm_mon = vsf_sysutil_atoi(mon) - 1;
the_time.tm_mday = vsf_sysutil_atoi(day);
}
if (len >= 14)
{
char hr[3];
char mins[3];
char sec[3];
vsf_sysutil_strcpy(hr, p_text + 8, 3);
vsf_sysutil_strcpy(mins, p_text + 10, 3);
vsf_sysutil_strcpy(sec, p_text + 12, 3);
the_time.tm_hour = vsf_sysutil_atoi(hr);
the_time.tm_min = vsf_sysutil_atoi(mins);
the_time.tm_sec = vsf_sysutil_atoi(sec);
}
return mktime(&the_time);
}
int
vsf_sysutil_setmodtime(const char* p_file, long the_time, int is_localtime)
{
struct utimbuf new_times;
if (!is_localtime)
{
the_time -= s_timezone;
}
vsf_sysutil_memclr(&new_times, sizeof(new_times));
new_times.actime = the_time;
new_times.modtime = the_time;
return utime(p_file, &new_times);
}
void
vsf_sysutil_ftruncate(int fd)
{
int ret = ftruncate(fd, 0);
if (ret != 0)
{
die("ftruncate");
}
}
int
vsf_sysutil_getuid(void)
{
return getuid();
}
void
vsf_sysutil_set_address_space_limit(unsigned long bytes)
{
/* Unfortunately, OpenBSD is missing RLIMIT_AS. */
#ifdef RLIMIT_AS
int ret;
struct rlimit rlim;
rlim.rlim_cur = bytes;
rlim.rlim_max = bytes;
ret = setrlimit(RLIMIT_AS, &rlim);
/* Permit EPERM as this could indicate that the shell launching vsftpd already
* has a lower limit.
*/
if (ret != 0 && errno != EPERM)
{
die("setrlimit");
}
#endif /* RLIMIT_AS */
(void) bytes;
}
void
vsf_sysutil_set_no_fds()
{
int ret;
struct rlimit rlim;
rlim.rlim_cur = 0;
rlim.rlim_max = 0;
ret = setrlimit(RLIMIT_NOFILE, &rlim);
if (ret != 0)
{
die("setrlimit NOFILE");
}
}
void
vsf_sysutil_set_no_procs()
{
#ifdef RLIMIT_NPROC
int ret;
struct rlimit rlim;
rlim.rlim_cur = 0;
rlim.rlim_max = 0;
ret = setrlimit(RLIMIT_NPROC, &rlim);
if (ret != 0)
{
die("setrlimit NPROC");
}
#endif
}
void
vsf_sysutil_post_fork()
{
int i;
/* Don't inherit any exit function. */
s_exit_func = NULL;
/* Uncached the current PID. */
s_current_pid = -1;
/* Don't inherit anything relating to the synchronous signal system */
s_io_handler = NULL;
for (i=0; i < NSIG; ++i)
{
s_sig_details[i].sync_sig_handler = NULL;
}
for (i=0; i < NSIG; ++i)
{
s_sig_details[i].pending = 0;
}
}
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