commit - 4def0885171731e9d4abf899de3fc60e55e33fc8
commit + 8f01fac29bbd2a3afdab7297a4145192692400a5
blob - /dev/null
blob + bbdbefedb14cf927c971d7f6f37b7192baeac977 (mode 644)
--- /dev/null
+++ compat/recallocarray.c
+/*
+ * Copyright (c) 2008, 2017 Otto Moerbeek <otto@drijf.net>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include "compat.h"
+
+#include <errno.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include <string.h>
+#include <unistd.h>
+
+/*
+ * This is sqrt(SIZE_MAX+1), as s1*s2 <= SIZE_MAX
+ * if both s1 < MUL_NO_OVERFLOW and s2 < MUL_NO_OVERFLOW
+ */
+#define MUL_NO_OVERFLOW ((size_t)1 << (sizeof(size_t) * 4))
+
+/*
+ * Even though specified in POSIX, the PAGESIZE and PAGE_SIZE
+ * macros have very poor portability. Since we only use this
+ * to avoid free() overhead for small shrinking, simply pick
+ * an arbitrary number.
+ */
+#define getpagesize() (1UL << 12)
+
+void *
+recallocarray(void *ptr, size_t oldnmemb, size_t newnmemb, size_t size)
+{
+ size_t oldsize, newsize;
+ void *newptr;
+
+ if (ptr == NULL)
+ return calloc(newnmemb, size);
+
+ if ((newnmemb >= MUL_NO_OVERFLOW || size >= MUL_NO_OVERFLOW) &&
+ newnmemb > 0 && SIZE_MAX / newnmemb < size) {
+ errno = ENOMEM;
+ return NULL;
+ }
+ newsize = newnmemb * size;
+
+ if ((oldnmemb >= MUL_NO_OVERFLOW || size >= MUL_NO_OVERFLOW) &&
+ oldnmemb > 0 && SIZE_MAX / oldnmemb < size) {
+ errno = EINVAL;
+ return NULL;
+ }
+ oldsize = oldnmemb * size;
+
+ /*
+ * Don't bother too much if we're shrinking just a bit,
+ * we do not shrink for series of small steps, oh well.
+ */
+ if (newsize <= oldsize) {
+ size_t d = oldsize - newsize;
+
+ if (d < oldsize / 2 && d < getpagesize()) {
+ memset((char *)ptr + newsize, 0, d);
+ return ptr;
+ }
+ }
+
+ newptr = malloc(newsize);
+ if (newptr == NULL)
+ return NULL;
+
+ if (newsize > oldsize) {
+ memcpy(newptr, ptr, oldsize);
+ memset((char *)newptr + oldsize, 0, newsize - oldsize);
+ } else
+ memcpy(newptr, ptr, newsize);
+
+ explicit_bzero(ptr, oldsize);
+ free(ptr);
+
+ return newptr;
+}
blob - /dev/null
blob + 15c6f0991321ddd8d80d0f6ad75937e68c84a810 (mode 644)
--- /dev/null
+++ compat/setproctitle.c
+/*
+ * Copyright (c) 2016 Nicholas Marriott <nicholas.marriott@gmail.com>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
+ * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
+ * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include "compat.h"
+
+#include <sys/types.h>
+
+#include <stdarg.h>
+#include <stdio.h>
+#include <string.h>
+
+#if HAVE_PR_SET_NAME
+
+#include <sys/prctl.h>
+
+void
+setproctitle(const char *fmt, ...)
+{
+ char title[16], name[16], *cp;
+ va_list ap;
+ int used;
+
+ va_start(ap, fmt);
+ vsnprintf(title, sizeof title, fmt, ap);
+ va_end(ap);
+
+ used = snprintf(name, sizeof name, "%s: %s", getprogname(), title);
+ if (used >= (int)sizeof name) {
+ cp = strrchr(name, ' ');
+ if (cp != NULL)
+ *cp = '\0';
+ }
+ prctl(PR_SET_NAME, name);
+}
+#else
+void
+setproctitle(const char *fmt, ...)
+{
+ (void)fmt;
+}
+#endif
