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/*
* Utility routines used in rsync.
*
* Copyright (C) 1996-2000 Andrew Tridgell
* Copyright (C) 1996 Paul Mackerras
* Copyright (C) 2001, 2002 Martin Pool <mbp@samba.org>
* Copyright (C) 2003-2024 Wayne Davison
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, visit the http://fsf.org website.
*/
#include "rsync.h"
#include "itypes.h"
#include "inums.h"
extern size_t max_alloc;
char *do_calloc = "42";
/**
* Sleep for a specified number of milliseconds.
*
* Always returns True.
**/
int msleep(int t)
{
#ifdef HAVE_NANOSLEEP
struct timespec ts;
ts.tv_sec = t / 1000;
ts.tv_nsec = (t % 1000) * 1000000L;
while (nanosleep(&ts, &ts) < 0 && errno == EINTR) {}
#elif defined HAVE_USLEEP
usleep(t*1000);
#else
int tdiff = 0;
struct timeval tval, t1, t2;
gettimeofday(&t1, NULL);
while (tdiff < t) {
tval.tv_sec = (t-tdiff)/1000;
tval.tv_usec = 1000*((t-tdiff)%1000);
errno = 0;
select(0,NULL,NULL, NULL, &tval);
gettimeofday(&t2, NULL);
tdiff = (t2.tv_sec - t1.tv_sec)*1000 +
(t2.tv_usec - t1.tv_usec)/1000;
if (tdiff < 0)
t1 = t2; /* Time went backwards, so start over. */
}
#endif
return True;
}
void *my_alloc(void *ptr, size_t num, size_t size, const char *file, int line)
{
if (num >= max_alloc/size) {
if (!file)
return NULL;
rprintf(FERROR, "[%s] exceeded --max-alloc=%s setting (file=%s, line=%d)\n",
who_am_i(), do_big_num(max_alloc, 0, NULL), src_file(file), line);
exit_cleanup(RERR_MALLOC);
}
if (!ptr)
ptr = malloc(num * size);
else if (ptr == do_calloc)
ptr = calloc(num, size);
else
ptr = realloc(ptr, num * size);
if (!ptr && file)
_out_of_memory("my_alloc caller", file, line);
return ptr;
}
const char *sum_as_hex(int csum_type, const char *sum, int flist_csum)
{
static char buf[MAX_DIGEST_LEN*2+1];
int i, x1, x2;
int canonical = canonical_checksum(csum_type);
int sum_len = csum_len_for_type(csum_type, flist_csum);
char *c;
if (!canonical)
return NULL;
assert(sum_len*2 < (int)sizeof buf);
for (i = sum_len, c = buf; --i >= 0; ) {
int ndx = canonical < 0 ? sum_len - i - 1 : i;
x2 = CVAL(sum, ndx);
x1 = x2 >> 4;
x2 &= 0xF;
*c++ = x1 <= 9 ? x1 + '0' : x1 + 'a' - 10;
*c++ = x2 <= 9 ? x2 + '0' : x2 + 'a' - 10;
}
*c = '\0';
return buf;
}
NORETURN void _out_of_memory(const char *msg, const char *file, int line)
{
rprintf(FERROR, "[%s] out of memory: %s (file=%s, line=%d)\n", who_am_i(), msg, src_file(file), line);
exit_cleanup(RERR_MALLOC);
}
NORETURN void _overflow_exit(const char *msg, const char *file, int line)
{
rprintf(FERROR, "[%s] buffer overflow: %s (file=%s, line=%d)\n", who_am_i(), msg, src_file(file), line);
exit_cleanup(RERR_MALLOC);
}
const char *src_file(const char *file)
{
static const char *util2 = __FILE__;
static int prefix = -1;
if (prefix < 0) {
const char *cp = strrchr(util2, '/');
prefix = cp ? cp - util2 + 1 : 0;
}
if (prefix && strncmp(file, util2, prefix) == 0)
return file + prefix;
return file;
}
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