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-rw-r--r--main/musl/getconf.c323
1 files changed, 323 insertions, 0 deletions
diff --git a/main/musl/getconf.c b/main/musl/getconf.c
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+/*-
+ * Copyright (c) 1996, 1998 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to The NetBSD Foundation
+ * by J.T. Conklin.
+ *
+ * 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
+ * ``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 FOUNDATION OR CONTRIBUTORS
+ * 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.
+ */
+
+/* Fixed to be used with musl in Alpine Linux by Timo Teräs. */
+
+#include <err.h>
+#include <errno.h>
+#include <limits.h>
+#include <locale.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <string.h>
+
+struct conf_variable
+{
+ const char *name;
+ enum { SYSCONF, CONFSTR, PATHCONF, CONSTANT } type;
+ long value;
+};
+
+static const struct conf_variable conf_table[] =
+{
+ { "PATH", CONFSTR, _CS_PATH },
+
+ /* Utility Limit Minimum Values */
+ { "POSIX2_BC_BASE_MAX", CONSTANT, _POSIX2_BC_BASE_MAX },
+ { "POSIX2_BC_DIM_MAX", CONSTANT, _POSIX2_BC_DIM_MAX },
+ { "POSIX2_BC_SCALE_MAX", CONSTANT, _POSIX2_BC_SCALE_MAX },
+ { "POSIX2_BC_STRING_MAX", CONSTANT, _POSIX2_BC_STRING_MAX },
+ { "POSIX2_COLL_WEIGHTS_MAX", CONSTANT, _POSIX2_COLL_WEIGHTS_MAX },
+ { "POSIX2_EXPR_NEST_MAX", CONSTANT, _POSIX2_EXPR_NEST_MAX },
+ { "POSIX2_LINE_MAX", CONSTANT, _POSIX2_LINE_MAX },
+ { "POSIX2_RE_DUP_MAX", CONSTANT, _POSIX2_RE_DUP_MAX },
+ { "POSIX2_VERSION", CONSTANT, _POSIX2_VERSION },
+
+ /* POSIX.1 Minimum Values */
+ { "_POSIX_AIO_LISTIO_MAX", CONSTANT, _POSIX_AIO_LISTIO_MAX },
+ { "_POSIX_AIO_MAX", CONSTANT, _POSIX_AIO_MAX },
+ { "_POSIX_ARG_MAX", CONSTANT, _POSIX_ARG_MAX },
+ { "_POSIX_CHILD_MAX", CONSTANT, _POSIX_CHILD_MAX },
+ { "_POSIX_LINK_MAX", CONSTANT, _POSIX_LINK_MAX },
+ { "_POSIX_MAX_CANON", CONSTANT, _POSIX_MAX_CANON },
+ { "_POSIX_MAX_INPUT", CONSTANT, _POSIX_MAX_INPUT },
+ { "_POSIX_MQ_OPEN_MAX", CONSTANT, _POSIX_MQ_OPEN_MAX },
+ { "_POSIX_MQ_PRIO_MAX", CONSTANT, _POSIX_MQ_PRIO_MAX },
+ { "_POSIX_NAME_MAX", CONSTANT, _POSIX_NAME_MAX },
+ { "_POSIX_NGROUPS_MAX", CONSTANT, _POSIX_NGROUPS_MAX },
+ { "_POSIX_OPEN_MAX", CONSTANT, _POSIX_OPEN_MAX },
+ { "_POSIX_PATH_MAX", CONSTANT, _POSIX_PATH_MAX },
+ { "_POSIX_PIPE_BUF", CONSTANT, _POSIX_PIPE_BUF },
+ { "_POSIX_SSIZE_MAX", CONSTANT, _POSIX_SSIZE_MAX },
+ { "_POSIX_STREAM_MAX", CONSTANT, _POSIX_STREAM_MAX },
+ { "_POSIX_TZNAME_MAX", CONSTANT, _POSIX_TZNAME_MAX },
+
+ /* Symbolic Utility Limits */
+ { "BC_BASE_MAX", SYSCONF, _SC_BC_BASE_MAX },
+ { "BC_DIM_MAX", SYSCONF, _SC_BC_DIM_MAX },
+ { "BC_SCALE_MAX", SYSCONF, _SC_BC_SCALE_MAX },
+ { "BC_STRING_MAX", SYSCONF, _SC_BC_STRING_MAX },
+ { "COLL_WEIGHTS_MAX", SYSCONF, _SC_COLL_WEIGHTS_MAX },
+ { "EXPR_NEST_MAX", SYSCONF, _SC_EXPR_NEST_MAX },
+ { "LINE_MAX", SYSCONF, _SC_LINE_MAX },
+ { "RE_DUP_MAX", SYSCONF, _SC_RE_DUP_MAX },
+
+ /* Optional Facility Configuration Values */
+ { "_POSIX2_C_BIND", SYSCONF, _SC_2_C_BIND },
+ { "POSIX2_C_DEV", SYSCONF, _SC_2_C_DEV },
+ { "POSIX2_CHAR_TERM", SYSCONF, _SC_2_CHAR_TERM },
+ { "POSIX2_FORT_DEV", SYSCONF, _SC_2_FORT_DEV },
+ { "POSIX2_FORT_RUN", SYSCONF, _SC_2_FORT_RUN },
+ { "POSIX2_LOCALEDEF", SYSCONF, _SC_2_LOCALEDEF },
+ { "POSIX2_SW_DEV", SYSCONF, _SC_2_SW_DEV },
+ { "POSIX2_UPE", SYSCONF, _SC_2_UPE },
+
+ /* POSIX.1 Configurable System Variables */
+ { "AIO_LISTIO_MAX", SYSCONF, _SC_AIO_LISTIO_MAX },
+ { "AIO_MAX", SYSCONF, _SC_AIO_MAX },
+ { "ARG_MAX", SYSCONF, _SC_ARG_MAX },
+ { "CHILD_MAX", SYSCONF, _SC_CHILD_MAX },
+ { "CLK_TCK", SYSCONF, _SC_CLK_TCK },
+ { "MQ_OPEN_MAX", SYSCONF, _SC_MQ_OPEN_MAX },
+ { "MQ_PRIO_MAX", SYSCONF, _SC_MQ_PRIO_MAX },
+ { "NGROUPS_MAX", SYSCONF, _SC_NGROUPS_MAX },
+ { "OPEN_MAX", SYSCONF, _SC_OPEN_MAX },
+ { "STREAM_MAX", SYSCONF, _SC_STREAM_MAX },
+ { "TZNAME_MAX", SYSCONF, _SC_TZNAME_MAX },
+ { "_POSIX_JOB_CONTROL", SYSCONF, _SC_JOB_CONTROL },
+ { "_POSIX_SAVED_IDS", SYSCONF, _SC_SAVED_IDS },
+ { "_POSIX_VERSION", SYSCONF, _SC_VERSION },
+
+ { "LINK_MAX", PATHCONF, _PC_LINK_MAX },
+ { "MAX_CANON", PATHCONF, _PC_MAX_CANON },
+ { "MAX_INPUT", PATHCONF, _PC_MAX_INPUT },
+ { "NAME_MAX", PATHCONF, _PC_NAME_MAX },
+ { "PATH_MAX", PATHCONF, _PC_PATH_MAX },
+ { "PIPE_BUF", PATHCONF, _PC_PIPE_BUF },
+ { "_POSIX_CHOWN_RESTRICTED", PATHCONF, _PC_CHOWN_RESTRICTED },
+ { "_POSIX_NO_TRUNC", PATHCONF, _PC_NO_TRUNC },
+ { "_POSIX_VDISABLE", PATHCONF, _PC_VDISABLE },
+
+ /* POSIX.1b Configurable System Variables */
+ { "PAGESIZE", SYSCONF, _SC_PAGESIZE },
+ { "_POSIX_ASYNCHRONOUS_IO", SYSCONF, _SC_ASYNCHRONOUS_IO },
+ { "_POSIX_FSYNC", SYSCONF, _SC_FSYNC },
+ { "_POSIX_MAPPED_FILES", SYSCONF, _SC_MAPPED_FILES },
+ { "_POSIX_MEMLOCK", SYSCONF, _SC_MEMLOCK },
+ { "_POSIX_MEMLOCK_RANGE", SYSCONF, _SC_MEMLOCK_RANGE },
+ { "_POSIX_MEMORY_PROTECTION", SYSCONF, _SC_MEMORY_PROTECTION },
+ { "_POSIX_MESSAGE_PASSING", SYSCONF, _SC_MESSAGE_PASSING },
+ { "_POSIX_MONOTONIC_CLOCK", SYSCONF, _SC_MONOTONIC_CLOCK },
+ { "_POSIX_PRIORITY_SCHEDULING", SYSCONF, _SC_PRIORITY_SCHEDULING },
+ { "_POSIX_SEMAPHORES", SYSCONF, _SC_SEMAPHORES },
+ { "_POSIX_SHARED_MEMORY_OBJECTS", SYSCONF, _SC_SHARED_MEMORY_OBJECTS },
+ { "_POSIX_SYNCHRONIZED_IO", SYSCONF, _SC_SYNCHRONIZED_IO },
+ { "_POSIX_TIMERS", SYSCONF, _SC_TIMERS },
+
+ { "_POSIX_SYNC_IO", PATHCONF, _PC_SYNC_IO },
+
+ /* POSIX.1c Configurable System Variables */
+ { "LOGIN_NAME_MAX", SYSCONF, _SC_LOGIN_NAME_MAX },
+ { "_POSIX_THREADS", SYSCONF, _SC_THREADS },
+
+ /* POSIX.1j Configurable System Variables */
+ { "_POSIX_BARRIERS", SYSCONF, _SC_BARRIERS },
+ { "_POSIX_READER_WRITER_LOCKS", SYSCONF, _SC_READER_WRITER_LOCKS },
+ { "_POSIX_SPIN_LOCKS", SYSCONF, _SC_SPIN_LOCKS },
+
+ /* XPG4.2 Configurable System Variables */
+ { "IOV_MAX", SYSCONF, _SC_IOV_MAX },
+ { "PAGE_SIZE", SYSCONF, _SC_PAGE_SIZE },
+ { "_XOPEN_SHM", SYSCONF, _SC_XOPEN_SHM },
+
+ /* X/Open CAE Spec. Issue 5 Version 2 Configurable System Variables */
+ { "FILESIZEBITS", PATHCONF, _PC_FILESIZEBITS },
+
+ /* POSIX.1-2001 XSI Option Group Configurable System Variables */
+ { "ATEXIT_MAX", SYSCONF, _SC_ATEXIT_MAX },
+
+ /* POSIX.1-2001 TSF Configurable System Variables */
+ { "GETGR_R_SIZE_MAX", SYSCONF, _SC_GETGR_R_SIZE_MAX },
+ { "GETPW_R_SIZE_MAX", SYSCONF, _SC_GETPW_R_SIZE_MAX },
+
+ /* Commonly provided extensions */
+ { "_NPROCESSORS_CONF", SYSCONF, _SC_NPROCESSORS_CONF },
+ { "_NPROCESSORS_ONLN", SYSCONF, _SC_NPROCESSORS_ONLN },
+
+ { NULL, CONSTANT, 0L }
+};
+
+static int a_flag = 0; /* list all variables */
+
+static void usage(const char *p)
+{
+ (void)fprintf(stderr, "Usage: %s system_var\n\t%s -a\n"
+ "\t%s path_var pathname\n\t%s -a pathname\n", p, p, p, p);
+ exit(EXIT_FAILURE);
+}
+
+static void print_longvar(const char *name, long value)
+{
+ if (a_flag)
+ (void)printf("%s = %ld\n", name, value);
+ else
+ (void)printf("%ld\n", value);
+}
+
+static void print_strvar(const char *name, const char *sval)
+{
+ if (a_flag)
+ (void)printf("%s = %s\n", name, sval);
+ else
+ (void)printf("%s\n", sval);
+}
+
+static void
+printvar(const struct conf_variable *cp, const char *pathname)
+{
+ size_t slen;
+ char *sval;
+ long val;
+
+ switch (cp->type) {
+ case CONSTANT:
+ print_longvar(cp->name, cp->value);
+ break;
+
+ case CONFSTR:
+ errno = 0;
+ slen = confstr((int)cp->value, NULL, 0);
+ if (slen == 0) {
+ if (errno != 0)
+out: err(EXIT_FAILURE, "confstr(%ld)", cp->value);
+ else
+ print_strvar(cp->name, "undefined");
+ }
+
+ if ((sval = malloc(slen)) == NULL)
+ err(EXIT_FAILURE, "Can't allocate %zu bytes", slen);
+
+ errno = 0;
+ if (confstr((int)cp->value, sval, slen) == 0) {
+ if (errno != 0)
+ goto out;
+ else
+ print_strvar(cp->name, "undefined");
+ } else
+ print_strvar(cp->name, sval);
+
+ free(sval);
+ break;
+
+ case SYSCONF:
+ errno = 0;
+ if ((val = sysconf((int)cp->value)) == -1) {
+ if (errno != 0)
+ err(EXIT_FAILURE, "sysconf(%ld)", cp->value);
+ print_strvar(cp->name, "undefined");
+ } else
+ print_longvar(cp->name, val);
+ break;
+
+ case PATHCONF:
+ errno = 0;
+ if ((val = pathconf(pathname, (int)cp->value)) == -1) {
+ if (errno != 0) {
+ if (a_flag && errno == EINVAL) {
+ /* Just skip invalid variables */
+ return;
+ }
+ err(EXIT_FAILURE, "pathconf(%s, %ld)",
+ pathname, cp->value);
+ /* NOTREACHED */
+ }
+
+ print_strvar(cp->name, "undefined");
+ } else
+ print_longvar(cp->name, val);
+ break;
+ }
+}
+
+int
+main(int argc, char **argv)
+{
+ int ch;
+ const char *progname = argv[0];
+ const struct conf_variable *cp;
+ const char *varname, *pathname;
+ int found;
+
+ (void)setlocale(LC_ALL, "");
+
+ while ((ch = getopt(argc, argv, "a")) != -1) {
+ switch (ch) {
+ case 'a':
+ a_flag = 1;
+ break;
+ case '?':
+ default:
+ usage(progname);
+ }
+ }
+ argc -= optind;
+ argv += optind;
+
+ if (!a_flag) {
+ if (argc == 0)
+ usage(progname);
+ varname = argv[0];
+ argc--;
+ argv++;
+ } else
+ varname = NULL;
+
+ if (argc > 1)
+ usage(progname);
+ pathname = argv[0]; /* may be NULL */
+
+ found = 0;
+ for (cp = conf_table; cp->name != NULL; cp++) {
+ if (a_flag || strcmp(varname, cp->name) == 0) {
+ if ((cp->type == PATHCONF) == (pathname != NULL)) {
+ printvar(cp, pathname);
+ found = 1;
+ } else if (!a_flag)
+ errx(EXIT_FAILURE,
+ "%s: invalid variable type", cp->name);
+ }
+ }
+
+ if (!a_flag && !found)
+ errx(EXIT_FAILURE, "%s: unknown variable", varname);
+
+ (void)fflush(stdout);
+ return ferror(stdout) ? EXIT_FAILURE : EXIT_SUCCESS;
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-18 13:42:51 +0000