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authorPádraig Brady <P@draigBrady.com>2008-11-20 11:02:15 +0000
committerPádraig Brady <P@draigBrady.com>2008-11-21 15:46:26 +0000
commita2be861b04f2bf8f967e7aa8683c813e7ebf5811 (patch)
tree317f783bc7d0610fcbdfeba869e79d389e2299d4
parentfbd87029cfc494a72bb73ade27ef46382c5bc832 (diff)
downloadcoreutils-a2be861b04f2bf8f967e7aa8683c813e7ebf5811.tar.xz
getlimits: A new utility for use in coreutils' tests
* src/getlimits.c: A utility to print platform dependent limits in a format suitable for use in shell scripts. * src/Makefile.am: Add getlimits to list of utilities to build but not install. Also add it to the list linked with libiconv * po/POTFILES.in: Add getlimits to translation list.
-rw-r--r--po/POTFILES.in1
-rw-r--r--src/Makefile.am4
-rw-r--r--src/getlimits.c180
3 files changed, 184 insertions, 1 deletions
diff --git a/po/POTFILES.in b/po/POTFILES.in
index 8a6e541f4..9bd8c43a9 100644
--- a/po/POTFILES.in
+++ b/po/POTFILES.in
@@ -62,6 +62,7 @@ src/factor.c
src/false.c
src/fmt.c
src/fold.c
+src/getlimits.c
src/group-list.c
src/groups.c
src/head.c
diff --git a/src/Makefile.am b/src/Makefile.am
index 097cc7a2e..a6bc22925 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -44,7 +44,7 @@ EXTRA_PROGRAMS = \
bin_PROGRAMS = $(OPTIONAL_BIN_PROGS)
-noinst_PROGRAMS = setuidgid
+noinst_PROGRAMS = setuidgid getlimits
noinst_HEADERS = \
chown-core.h \
@@ -82,6 +82,7 @@ LDADD = libver.a ../lib/libcoreutils.a $(LIBINTL) ../lib/libcoreutils.a
cat_LDADD = $(LDADD)
df_LDADD = $(LDADD)
du_LDADD = $(LDADD)
+getlimits_LDADD = $(LDADD)
ptx_LDADD = $(LDADD)
split_LDADD = $(LDADD)
timeout_LDADD = $(LDADD)
@@ -160,6 +161,7 @@ cat_LDADD += $(LIBICONV)
cp_LDADD += $(LIBICONV)
df_LDADD += $(LIBICONV)
du_LDADD += $(LIBICONV)
+getlimits_LDADD += $(LIBICONV)
ptx_LDADD += $(LIBICONV)
split_LDADD += $(LIBICONV)
timeout_LDADD += $(LIBICONV)
diff --git a/src/getlimits.c b/src/getlimits.c
new file mode 100644
index 000000000..2b2bbfeea
--- /dev/null
+++ b/src/getlimits.c
@@ -0,0 +1,180 @@
+/* getlimits - print various platform dependent limits.
+ Copyright (C) 2008 Free Software Foundation, Inc.
+
+ 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, see <http://www.gnu.org/licenses/>. */
+
+/* Written by Pádraig Brady */
+
+#include <config.h> /* sets _FILE_OFFSET_BITS=64 etc. */
+#include <stdio.h>
+#include <sys/types.h>
+
+#include "system.h"
+#include "c-ctype.h"
+#include "long-options.h"
+
+#define PROGRAM_NAME "getlimits"
+
+#define AUTHORS proper_name_utf8 ("Padraig Brady", "P\303\241draig Brady")
+
+#ifndef TIME_T_MAX
+# define TIME_T_MAX TYPE_MAXIMUM (time_t)
+#endif
+
+#ifndef TIME_T_MIN
+# define TIME_T_MIN TYPE_MINIMUM (time_t)
+#endif
+
+#ifndef SSIZE_MIN
+# define SSIZE_MIN TYPE_MINIMUM (ssize_t)
+#endif
+
+#ifndef PID_T_MIN
+# define PID_T_MIN TYPE_MINIMUM (pid_t)
+#endif
+
+/* These are not interesting to print.
+ * Instead of these defines it would be nice to be able to do
+ * #ifdef (TYPE##_MIN) in function macro below. */
+#define SIZE_MIN 0
+#define UCHAR_MIN 0
+#define UINT_MIN 0
+#define ULONG_MIN 0
+#define UINTMAX_MIN 0
+#define UID_T_MIN 0
+#define GID_T_MIN 0
+
+static void
+usage (int status)
+{
+ if (status != EXIT_SUCCESS)
+ fprintf (stderr, _("Try `%s --help' for more information.\n"),
+ program_name);
+ else
+ {
+ printf (_("\
+Usage: %s\n\
+"), program_name);
+
+ fputs (_("\
+Output platform dependent limits in a format useful for shell scripts.\n\
+\n\
+"), stdout);
+ fputs (HELP_OPTION_DESCRIPTION, stdout);
+ fputs (VERSION_OPTION_DESCRIPTION, stdout);
+ emit_bug_reporting_address ();
+ }
+ exit (status);
+}
+
+/* Add absolute values of ascii decimal strings.
+ * Strings can have leading spaces.
+ * If any string has a '-' it's preserved in the output:
+ * I.E.
+ * 1 + 1 -> 2
+ * -1 + -1 -> -2
+ * -1 + 1 -> -2
+ * 1 + -1 -> -2
+ */
+static char *
+decimal_ascii_add (const char *str1, const char *str2)
+{
+ int len1 = strlen (str1);
+ int len2 = strlen (str2);
+ int rlen = MAX (len1, len2) + 3; /* space for extra digit or sign + NUL */
+ char *result = xmalloc (rlen);
+ char *rp = result + rlen - 1;
+ const char *d1 = str1 + len1 - 1;
+ const char *d2 = str2 + len2 - 1;
+ int carry = 0;
+ *rp = '\0';
+
+ while (1)
+ {
+ char c1 = (d1 < str1 ? ' ' : (*d1 == '-' ? ' ' : *d1--));
+ char c2 = (d2 < str2 ? ' ' : (*d2 == '-' ? ' ' : *d2--));
+ char t1 = c1 + c2 + carry; /* ASCII digits are BCD */
+ if (!c_isdigit (c1) && !c_isdigit (c2) && !carry)
+ break;
+ carry = t1 > '0' + '9' || t1 == ' ' + '9' + 1;
+ t1 += 6 * carry;
+ *--rp = (t1 & 0x0F) | 0x30; /* top nibble to ASCII */
+ }
+ if ((d1 >= str1 && *d1 == '-') || (d2 >= str2 && (*d2 == '-')))
+ *--rp = '-';
+
+ if (rp != result)
+ memmove (result, rp, rlen - (rp - result));
+
+ return result;
+}
+
+int
+main (int argc, char **argv)
+{
+ char limit[64]; /* big enough for 128 bit at least */
+ char *oflow;
+
+ initialize_main (&argc, &argv);
+ set_program_name (argv[0]);
+ setlocale (LC_ALL, "");
+ bindtextdomain (PACKAGE, LOCALEDIR);
+ textdomain (PACKAGE);
+
+ initialize_exit_failure (EXIT_FAILURE);
+ atexit (close_stdout);
+
+ parse_long_options (argc, argv, PROGRAM_NAME, PACKAGE_NAME, VERSION,
+ usage, AUTHORS, (char const *) NULL);
+
+#define print_int(TYPE) \
+ snprintf (limit, sizeof(limit), "%"PRIuMAX, (uintmax_t)TYPE##_MAX); \
+ printf (#TYPE"_MAX=%s\n", limit); \
+ oflow = decimal_ascii_add (limit, "1"); \
+ printf (#TYPE"_OFLOW=%s\n", oflow); \
+ free (oflow); \
+ if (TYPE##_MIN) \
+ { \
+ snprintf (limit, sizeof(limit), "%"PRIdMAX, (intmax_t)TYPE##_MIN); \
+ printf (#TYPE"_MIN=%s\n", limit); \
+ oflow = decimal_ascii_add (limit, "-1"); \
+ printf (#TYPE"_UFLOW=%s\n", oflow); \
+ free (oflow); \
+ }
+
+ /* Variable sized ints */
+ print_int (CHAR);
+ print_int (SCHAR);
+ print_int (UCHAR);
+ print_int (SHRT);
+ print_int (INT);
+ print_int (UINT);
+ print_int (LONG);
+ print_int (ULONG);
+ print_int (SIZE);
+ print_int (SSIZE);
+ print_int (TIME_T);
+ print_int (UID_T);
+ print_int (GID_T);
+ print_int (PID_T);
+ print_int (OFF_T);
+ print_int (INTMAX);
+ print_int (UINTMAX);
+}
+
+/*
+ * Local variables:
+ * indent-tabs-mode: nil
+ * End:
+ */