- (djm) [configure.ac mux.c sftp.c openbsd-compat/Makefile.in]

   [openbsd-compat/fmt_scaled.c openbsd-compat/openbsd-compat.h]
   Fix compilation on Linux, including pulling in fmt_scaled(3)
   implementation from OpenBSD's libutil.

3 files changed, 282 insertions, 3 deletions

diff --git a/openbsd-compat/Makefile.in b/openbsd-compat/Makefile.in
index b44a7851e..d1ec47b6e 100644
--- a/openbsd-compat/Makefile.in
+++ b/openbsd-compat/Makefile.in
@@ -1,4 +1,4 @@
-# $Id: Makefile.in,v 1.41 2007/06/25 12:15:13 dtucker Exp $
+# $Id: Makefile.in,v 1.42 2008/05/19 22:57:08 djm Exp $
 
 sysconfdir=@sysconfdir@
 piddir=@piddir@
@@ -16,7 +16,7 @@ RANLIB=@RANLIB@
 INSTALL=@INSTALL@
 LDFLAGS=-L. @LDFLAGS@
 
-OPENBSD=base64.o basename.o bindresvport.o daemon.o dirname.o getcwd.o getgrouplist.o getopt.o getrrsetbyname.o glob.o inet_aton.o inet_ntoa.o inet_ntop.o mktemp.o readpassphrase.o realpath.o rresvport.o setenv.o setproctitle.o sha2.o sigact.o strlcat.o strlcpy.o strmode.o strsep.o strtonum.o strtoll.o strtoul.o vis.o
+OPENBSD=base64.o basename.o bindresvport.o daemon.o dirname.o fmt_scaled.o getcwd.o getgrouplist.o getopt.o getrrsetbyname.o glob.o inet_aton.o inet_ntoa.o inet_ntop.o mktemp.o readpassphrase.o realpath.o rresvport.o setenv.o setproctitle.o sha2.o sigact.o strlcat.o strlcpy.o strmode.o strsep.o strtonum.o strtoll.o strtoul.o vis.o
 
 COMPAT=bsd-arc4random.o bsd-asprintf.o bsd-closefrom.o bsd-cray.o bsd-cygwin_util.o bsd-getpeereid.o bsd-misc.o bsd-nextstep.o bsd-openpty.o bsd-poll.o bsd-snprintf.o bsd-waitpid.o fake-rfc2553.o openssl-compat.o xmmap.o xcrypt.o
 
diff --git a/openbsd-compat/fmt_scaled.c b/openbsd-compat/fmt_scaled.c
new file mode 100644
index 000000000..edd682a49
--- /dev/null
+++ b/openbsd-compat/fmt_scaled.c
@@ -0,0 +1,274 @@
+/*      $OpenBSD: fmt_scaled.c,v 1.9 2007/03/20 03:42:52 tedu Exp $     */
+
+/*
+ * Copyright (c) 2001, 2002, 2003 Ian F. Darwin.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/* OPENBSD ORIGINAL: lib/libutil/fmt_scaled.c */
+
+/*
+ * fmt_scaled: Format numbers scaled for human comprehension
+ * scan_scaled: Scan numbers in this format.
+ *
+ * "Human-readable" output uses 4 digits max, and puts a unit suffix at
+ * the end.  Makes output compact and easy-to-read esp. on huge disks.
+ * Formatting code was originally in OpenBSD "df", converted to library routine.
+ * Scanning code written for OpenBSD libutil.
+ */
+
+#include "includes.h"
+
+#ifndef HAVE_FMT_SCALED
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <errno.h>
+#include <string.h>
+#include <ctype.h>
+#include <limits.h>
+
+typedef enum {
+        NONE = 0, KILO = 1, MEGA = 2, GIGA = 3, TERA = 4, PETA = 5, EXA = 6
+} unit_type;
+
+/* These three arrays MUST be in sync!  XXX make a struct */
+static unit_type units[] = { NONE, KILO, MEGA, GIGA, TERA, PETA, EXA };
+static char scale_chars[] = "BKMGTPE";
+static long long scale_factors[] = {
+        1LL,
+        1024LL,
+        1024LL*1024,
+        1024LL*1024*1024,
+        1024LL*1024*1024*1024,
+        1024LL*1024*1024*1024*1024,
+        1024LL*1024*1024*1024*1024*1024,
+};
+#define SCALE_LENGTH (sizeof(units)/sizeof(units[0]))
+
+#define MAX_DIGITS (SCALE_LENGTH * 3)   /* XXX strlen(sprintf("%lld", -1)? */
+
+/** Convert the given input string "scaled" into numeric in "result".
+ * Return 0 on success, -1 and errno set on error.
+ */
+int
+scan_scaled(char *scaled, long long *result)
+{
+        char *p = scaled;
+        int sign = 0;
+        unsigned int i, ndigits = 0, fract_digits = 0;
+        long long scale_fact = 1, whole = 0, fpart = 0;
+
+        /* Skip leading whitespace */
+        while (isascii(*p) && isspace(*p))
+                ++p;
+
+        /* Then at most one leading + or - */
+        while (*p == '-' || *p == '+') {
+                if (*p == '-') {
+                        if (sign) {
+                                errno = EINVAL;
+                                return -1;
+                        }
+                        sign = -1;
+                        ++p;
+                } else if (*p == '+') {
+                        if (sign) {
+                                errno = EINVAL;
+                                return -1;
+                        }
+                        sign = +1;
+                        ++p;
+                }
+        }
+
+        /* Main loop: Scan digits, find decimal point, if present.
+         * We don't allow exponentials, so no scientific notation
+         * (but note that E for Exa might look like e to some!).
+         * Advance 'p' to end, to get scale factor.
+         */
+        for (; isascii(*p) && (isdigit(*p) || *p=='.'); ++p) {
+                if (*p == '.') {
+                        if (fract_digits > 0) { /* oops, more than one '.' */
+                                errno = EINVAL;
+                                return -1;
+                        }
+                        fract_digits = 1;
+                        continue;
+                }
+
+                i = (*p) - '0';                 /* whew! finally a digit we can use */
+                if (fract_digits > 0) {
+                        if (fract_digits >= MAX_DIGITS-1)
+                                /* ignore extra fractional digits */
+                                continue;
+                        fract_digits++;         /* for later scaling */
+                        fpart *= 10;
+                        fpart += i;
+                } else {                                /* normal digit */
+                        if (++ndigits >= MAX_DIGITS) {
+                                errno = ERANGE;
+                                return -1;
+                        }
+                        whole *= 10;
+                        whole += i;
+                }
+        }
+
+        if (sign) {
+                whole *= sign;
+                fpart *= sign;
+        }
+
+        /* If no scale factor given, we're done. fraction is discarded. */
+        if (!*p) {
+                *result = whole;
+                return 0;
+        }
+
+        /* Validate scale factor, and scale whole and fraction by it. */
+        for (i = 0; i < SCALE_LENGTH; i++) {
+
+                /** Are we there yet? */
+                if (*p == scale_chars[i] ||
+                        *p == tolower(scale_chars[i])) {
+
+                        /* If it ends with alphanumerics after the scale char, bad. */
+                        if (isalnum(*(p+1))) {
+                                errno = EINVAL;
+                                return -1;
+                        }
+                        scale_fact = scale_factors[i];
+
+                        /* scale whole part */
+                        whole *= scale_fact;
+
+                        /* truncate fpart so it does't overflow.
+                         * then scale fractional part.
+                         */
+                        while (fpart >= LLONG_MAX / scale_fact) {
+                                fpart /= 10;
+                                fract_digits--;
+                        }
+                        fpart *= scale_fact;
+                        if (fract_digits > 0) {
+                                for (i = 0; i < fract_digits -1; i++)
+                                        fpart /= 10;
+                        }
+                        whole += fpart;
+                        *result = whole;
+                        return 0;
+                }
+        }
+        errno = ERANGE;
+        return -1;
+}
+
+/* Format the given "number" into human-readable form in "result".
+ * Result must point to an allocated buffer of length FMT_SCALED_STRSIZE.
+ * Return 0 on success, -1 and errno set if error.
+ */
+int
+fmt_scaled(long long number, char *result)
+{
+        long long abval, fract = 0;
+        unsigned int i;
+        unit_type unit = NONE;
+
+        abval = (number < 0LL) ? -number : number;      /* no long long_abs yet */
+
+        /* Not every negative long long has a positive representation.
+         * Also check for numbers that are just too darned big to format
+         */
+        if (abval < 0 || abval / 1024 >= scale_factors[SCALE_LENGTH-1]) {
+                errno = ERANGE;
+                return -1;
+        }
+
+        /* scale whole part; get unscaled fraction */
+        for (i = 0; i < SCALE_LENGTH; i++) {
+                if (abval/1024 < scale_factors[i]) {
+                        unit = units[i];
+                        fract = (i == 0) ? 0 : abval % scale_factors[i];
+                        number /= scale_factors[i];
+                        if (i > 0)
+                                fract /= scale_factors[i - 1];
+                        break;
+                }
+        }
+
+        fract = (10 * fract + 512) / 1024;
+        /* if the result would be >= 10, round main number */
+        if (fract == 10) {
+                if (number >= 0)
+                        number++;
+                else
+                        number--;
+                fract = 0;
+        }
+
+        if (number == 0)
+                strlcpy(result, "0B", FMT_SCALED_STRSIZE);
+        else if (unit == NONE || number >= 100 || number <= -100) {
+                if (fract >= 5) {
+                        if (number >= 0)
+                                number++;
+                        else
+                                number--;
+                }
+                (void)snprintf(result, FMT_SCALED_STRSIZE, "%lld%c",
+                        number, scale_chars[unit]);
+        } else
+                (void)snprintf(result, FMT_SCALED_STRSIZE, "%lld.%1lld%c",
+                        number, fract, scale_chars[unit]);
+
+        return 0;
+}
+
+#ifdef  MAIN
+/*
+ * This is the original version of the program in the man page.
+ * Copy-and-paste whatever you need from it.
+ */
+int
+main(int argc, char **argv)
+{
+        char *cinput = "1.5K", buf[FMT_SCALED_STRSIZE];
+        long long ninput = 10483892, result;
+
+        if (scan_scaled(cinput, &result) == 0)
+                printf("\"%s\" -> %lld\n", cinput, result);
+        else
+                perror(cinput);
+
+        if (fmt_scaled(ninput, buf) == 0)
+                printf("%lld -> \"%s\"\n", ninput, buf);
+        else
+                fprintf(stderr, "%lld invalid (%s)\n", ninput, strerror(errno));
+
+        return 0;
+}
+#endif
+
+#endif /* HAVE_FMT_SCALED */
diff --git a/openbsd-compat/openbsd-compat.h b/openbsd-compat/openbsd-compat.h
index eb48b362b..0b7d979e0 100644
--- a/openbsd-compat/openbsd-compat.h
+++ b/openbsd-compat/openbsd-compat.h
@@ -1,4 +1,4 @@
-/* $Id: openbsd-compat.h,v 1.44 2008/05/19 04:47:37 djm Exp $ */
+/* $Id: openbsd-compat.h,v 1.45 2008/05/19 22:57:08 djm Exp $ */
 
 /*
  * Copyright (c) 1999-2003 Damien Miller.  All rights reserved.
@@ -101,6 +101,11 @@ int daemon(int nochdir, int noclose);
 char *dirname(const char *path);
 #endif
 
+#ifndef HAVE_FMT_SCALED
+#define FMT_SCALED_STRSIZE      7
+int     fmt_scaled(long long number, char *result);
+#endif
+
 #if defined(BROKEN_INET_NTOA) || !defined(HAVE_INET_NTOA)
 char *inet_ntoa(struct in_addr in);
 #endif