diff options
Diffstat (limited to 'system/musl/getconf.c')
| -rw-r--r-- | system/musl/getconf.c | 338 |
1 files changed, 338 insertions, 0 deletions
diff --git a/system/musl/getconf.c b/system/musl/getconf.c new file mode 100644 index 000000000..c4235242b --- /dev/null +++ b/system/musl/getconf.c @@ -0,0 +1,338 @@ +/*- + * 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. + * + * Mostly rewritten to be used in Alpine Linux (with musl c-library) + * by Timo Teräs. + * + * 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. + */ + +#include <err.h> +#include <errno.h> +#include <values.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, UCONSTANT, NUM_TYPES } 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 */ +{ "_PHYS_PAGES", SYSCONF, _SC_PHYS_PAGES }, +{ "_AVPHYS_PAGES", SYSCONF, _SC_AVPHYS_PAGES }, +{ "_NPROCESSORS_CONF", SYSCONF, _SC_NPROCESSORS_CONF }, +{ "_NPROCESSORS_ONLN", SYSCONF, _SC_NPROCESSORS_ONLN }, + +/* Data type related extensions */ +{ "CHAR_BIT", CONSTANT, CHAR_BIT }, +{ "CHAR_MAX", CONSTANT, CHAR_MAX }, +{ "CHAR_MIN", CONSTANT, CHAR_MIN }, +{ "INT_MAX", CONSTANT, INT_MAX }, +{ "INT_MIN", CONSTANT, INT_MIN }, +{ "LONG_BIT", CONSTANT, LONG_BIT }, +{ "LONG_MAX", CONSTANT, LONG_MAX }, +{ "LONG_MIN", CONSTANT, LONG_MIN }, +{ "SCHAR_MAX", CONSTANT, SCHAR_MAX }, +{ "SCHAR_MIN", CONSTANT, SCHAR_MIN }, +{ "SHRT_MAX", CONSTANT, SHRT_MAX }, +{ "SHRT_MIN", CONSTANT, SHRT_MIN }, +{ "SSIZE_MAX", CONSTANT, SSIZE_MAX }, +{ "UCHAR_MAX", UCONSTANT, (long) UCHAR_MAX }, +{ "UINT_MAX", UCONSTANT, (long) UINT_MAX }, +{ "ULONG_MAX", UCONSTANT, (long) ULONG_MAX }, +{ "USHRT_MAX", UCONSTANT, (long) USHRT_MAX }, +{ "WORD_BIT", CONSTANT, WORD_BIT }, + +{ NULL, CONSTANT, 0L } +}; + +static int all = 0; + +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_long(const char *name, long val) +{ + if (all) printf("%s = %ld\n", name, val); + else printf("%ld\n", val); +} + +static void print_ulong(const char *name, unsigned long val) +{ + if (all) printf("%s = %lu\n", name, val); + else printf("%lu\n", val); +} + +static void print_string(const char *name, const char *val) +{ + if (all) printf("%s = %s\n", name, val); + else printf("%s\n", val); +} + +static int print_constant(const struct conf_variable *cp, const char *pathname) +{ + print_long(cp->name, cp->value); + return 0; +} + +static int print_uconstant(const struct conf_variable *cp, const char *pathname) +{ + print_ulong(cp->name, (unsigned long) cp->value); + return 0; +} + +static int print_sysconf(const struct conf_variable *cp, const char *pathname) +{ + long val; + + errno = 0; + if ((val = sysconf((int)cp->value)) == -1) { + if (errno != 0) err(EXIT_FAILURE, "sysconf(%ld)", cp->value); + return -1; + } + print_long(cp->name, val); + return 0; +} + +static int print_confstr(const struct conf_variable *cp, const char *pathname) +{ + size_t len; + char *val; + + errno = 0; + if ((len = confstr((int)cp->value, NULL, 0)) == 0) goto error; + if ((val = malloc(len)) == NULL) err(EXIT_FAILURE, "Can't allocate %zu bytes", len); + errno = 0; + if (confstr((int)cp->value, val, len) == 0) goto error; + print_string(cp->name, val); + free(val); + return 0; +error: + if (errno != EINVAL) err(EXIT_FAILURE, "confstr(%ld)", cp->value); + return -1; +} + +static int print_pathconf(const struct conf_variable *cp, const char *pathname) +{ + long val; + + errno = 0; + if ((val = pathconf(pathname, (int)cp->value)) == -1) { + if (all && errno == EINVAL) return 0; + if (errno != 0) err(EXIT_FAILURE, "pathconf(%s, %ld)", pathname, cp->value); + return -1; + } + print_long(cp->name, val); + return 0; +} + +typedef int (*handler_t)(const struct conf_variable *cp, const char *pathname); +static const handler_t type_handlers[NUM_TYPES] = { + [SYSCONF] = print_sysconf, + [CONFSTR] = print_confstr, + [PATHCONF] = print_pathconf, + [CONSTANT] = print_constant, + [UCONSTANT] = print_uconstant, +}; + +int main(int argc, char **argv) +{ + const char *progname = argv[0]; + const struct conf_variable *cp; + const char *varname, *pathname; + int ch, found = 0; + + (void)setlocale(LC_ALL, ""); + while ((ch = getopt(argc, argv, "a")) != -1) { + switch (ch) { + case 'a': + all = 1; + break; + case '?': + default: + usage(progname); + } + } + argc -= optind; + argv += optind; + + if (!all) { + if (argc == 0) + usage(progname); + varname = argv[0]; + argc--; + argv++; + } else + varname = NULL; + + if (argc > 1) + usage(progname); + pathname = argv[0]; /* may be NULL */ + + for (cp = conf_table; cp->name != NULL; cp++) { + if (!all && strcmp(varname, cp->name) != 0) continue; + if ((cp->type == PATHCONF) == (pathname != NULL)) { + if (type_handlers[cp->type](cp, pathname) < 0) + print_string(cp->name, "undefined"); + found = 1; + } else if (!all) + errx(EXIT_FAILURE, "%s: invalid variable type", cp->name); + } + if (!all && !found) errx(EXIT_FAILURE, "%s: unknown variable", varname); + (void)fflush(stdout); + return ferror(stdout) ? EXIT_FAILURE : EXIT_SUCCESS; +} |