/* $NetBSD: getconf.c,v 1.35.36.1 2024/03/10 19:03:30 martin Exp $ */ /*- * 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. */ #include #ifndef lint __RCSID("$NetBSD: getconf.c,v 1.35.36.1 2024/03/10 19:03:30 martin Exp $"); #endif /* not lint */ #include #include #include #include #include #include #include #include struct conf_variable { const char *name; enum { SYSCONF, CONFSTR, PATHCONF, CONSTANT } type; long value; }; static void print_longvar(const char *, long); static void print_strvar(const char *, const char *); static void printvar(const struct conf_variable *, const char *); static void usage(void) __dead; 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 }, #ifdef _NETBSD_SOURCE /* Commonly provided extensions */ { "NPROCESSORS_CONF", SYSCONF, _SC_NPROCESSORS_CONF }, { "NPROCESSORS_ONLN", SYSCONF, _SC_NPROCESSORS_ONLN }, #endif /* _NETBSD_SOURCE */ { NULL, CONSTANT, 0L } }; static int a_flag = 0; /* list all variables */ int main(int argc, char **argv) { int ch; const struct conf_variable *cp; const char *varname, *pathname, *vn; int found; setprogname(argv[0]); (void)setlocale(LC_ALL, ""); while ((ch = getopt(argc, argv, "a")) != -1) { switch (ch) { case 'a': a_flag = 1; break; case '?': default: usage(); } } argc -= optind; argv += optind; if (!a_flag) { if (argc == 0) usage(); varname = argv[0]; argc--; argv++; } else varname = NULL; if (argc > 1) usage(); pathname = argv[0]; /* may be NULL */ found = 0; vn = varname; again: for (cp = conf_table; cp->name != NULL; cp++) { if (a_flag || strcmp(vn, cp->name) == 0) { /*LINTED weird expression*/ 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) { if (*vn++ == '_') goto again; errx(EXIT_FAILURE, "%s: unknown variable", varname); } (void)fflush(stdout); return ferror(stdout) ? EXIT_FAILURE : EXIT_SUCCESS; } 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; } } static void usage(void) { const char *p = getprogname(); (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); }