/* * UNG's Not GNU * * Copyright (c) 2011-2017, Jakob Kaivo * * Permission to use, copy, modify, and/or distribute this software for any * purpose with or without fee is hereby granted, provided that the above * copyright notice and this permission notice appear in all copies. * * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. * */ #define _XOPEN_SOURCE 700 #include #include #include #include static struct namelist { const char *name; int num; } pathnames[] = { { "FILESIZEBITS", _PC_FILESIZEBITS }, { "LINK_MAX", _PC_LINK_MAX }, { "MAX_CANON", _PC_MAX_CANON }, { "MAX_INPUT", _PC_MAX_INPUT }, { "NAME_MAX", _PC_NAME_MAX }, { "PATH_MAX", _PC_PATH_MAX }, { "PIPE_BUF", _PC_PIPE_BUF }, { "POSIX2_SYMLINKS", _PC_2_SYMLINKS }, { "POSIX_ALLOC_SIZE_MIN", _PC_ALLOC_SIZE_MIN }, { "POSIX_REC_INCR_XFER_SIZE", _PC_REC_INCR_XFER_SIZE }, { "POSIX_REC_MAX_XFER_SIZE", _PC_REC_MAX_XFER_SIZE }, { "POSIX_REC_MIN_XFER_SIZE", _PC_REC_MIN_XFER_SIZE }, { "POSIX_REC_XFER_ALIGN", _PC_REC_XFER_ALIGN }, { "SYMLINK_MAX", _PC_SYMLINK_MAX }, { "_POSIX_CHOWN_RESTRICTED", _PC_CHOWN_RESTRICTED }, { "_POSIX_NO_TRUNC", _PC_NO_TRUNC }, { "_POSIX_VDISABLE", _PC_VDISABLE }, { "_POSIX_ASYNC_IO", _PC_ASYNC_IO }, { "_POSIX_PRIO_IO", _PC_PRIO_IO }, { "_POSIX_SYNC_IO", _PC_SYNC_IO }, /* { "_POSIX_TIMESTAMP_RESOLUTION", _PC_TIMESTAMP_RESOLUTION }, */ /* FIXME: just because glibc is broken... */ { 0, 0 }, }, sysnames[] = { { "AIO_LISTIO_MAX", _SC_AIO_LISTIO_MAX }, { "AIO_MAX", _SC_AIO_MAX }, { "AIO_PRIO_DELTA_MAX", _SC_AIO_PRIO_DELTA_MAX }, { "ARG_MAX", _SC_ARG_MAX }, { "ATEXIT_MAX", _SC_ATEXIT_MAX }, { "BC_BASE_MAX", _SC_BC_BASE_MAX }, { "BC_DIM_MAX", _SC_BC_DIM_MAX }, { "BC_SCALE_MAX", _SC_BC_SCALE_MAX }, { "BC_STRING_MAX", _SC_BC_STRING_MAX }, { "CHILD_MAX", _SC_CHILD_MAX }, { "COLL_WEIGHTS_MAX", _SC_COLL_WEIGHTS_MAX }, { "DELAYTIMER_MAX", _SC_DELAYTIMER_MAX }, { "EXPR_NEST_MAX", _SC_EXPR_NEST_MAX }, { "HOST_NAME_MAX", _SC_HOST_NAME_MAX }, { "IOV_MAX", _SC_IOV_MAX }, { "LINE_MAX", _SC_LINE_MAX }, { "LOGIN_NAME_MAX", _SC_LOGIN_NAME_MAX }, { "NGROUPS_MAX", _SC_NGROUPS_MAX }, { "MQ_OPEN_MAX", _SC_MQ_OPEN_MAX }, { "MQ_PRIO_MAX", _SC_MQ_PRIO_MAX }, { "OPEN_MAX", _SC_OPEN_MAX }, { "_POSIX_ADVISORY_INFO", _SC_ADVISORY_INFO }, { "_POSIX_BARRIERS", _SC_BARRIERS }, { "_POSIX_ASYNCHRONOUS_IO", _SC_ASYNCHRONOUS_IO }, { "_POSIX_CLOCK_SELECTION", _SC_CLOCK_SELECTION }, { "_POSIX_CPUTIME", _SC_CPUTIME }, { "_POSIX_FSYNC", _SC_FSYNC }, { "_POSIX_IPV6", _SC_IPV6 }, { "_POSIX_JOB_CONTROL", _SC_JOB_CONTROL }, { "_POSIX_MAPPED_FILES", _SC_MAPPED_FILES }, { "_POSIX_MEMLOCK", _SC_MEMLOCK }, { "_POSIX_MEMLOCK_RANGE", _SC_MEMLOCK_RANGE }, { "_POSIX_MEMORY_PROTECTION", _SC_MEMORY_PROTECTION }, { "_POSIX_MESSAGE_PASSING", _SC_MESSAGE_PASSING }, { "_POSIX_MONOTONIC_CLOCK", _SC_MONOTONIC_CLOCK }, { "_POSIX_PRIORITIZED_IO", _SC_PRIORITIZED_IO }, { "_POSIX_PRIORITY_SCHEDULING", _SC_PRIORITY_SCHEDULING }, { "_POSIX_RAW_SOCKETS", _SC_RAW_SOCKETS }, { "_POSIX_READER_WRITER_LOCKS", _SC_READER_WRITER_LOCKS }, { "_POSIX_REALTIME_SIGNALS", _SC_REALTIME_SIGNALS }, { "_POSIX_REGEXP", _SC_REGEXP }, { "_POSIX_SAVED_IDS", _SC_SAVED_IDS }, { "_POSIX_SEMAPHORES", _SC_SEMAPHORES }, { "_POSIX_SHARED_MEMORY_OBJECTS", _SC_SHARED_MEMORY_OBJECTS }, { "_POSIX_SHELL", _SC_SHELL }, { "_POSIX_SPAWN", _SC_SPAWN }, { "_POSIX_SPIN_LOCKS", _SC_SPIN_LOCKS }, { "_POSIX_SPORADIC_SERVER", _SC_SPORADIC_SERVER }, { "_POSIX_SS_REPL_MAX", _SC_SS_REPL_MAX }, { "_POSIX_SYNCHRONIZED_IO", _SC_SYNCHRONIZED_IO }, { "_POSIX_THREAD_ATTR_STACKADDR", _SC_THREAD_ATTR_STACKADDR }, { "_POSIX_THREAD_ATTR_STACKSIZE", _SC_THREAD_ATTR_STACKSIZE }, { "_POSIX_THREAD_CPUTIME", _SC_THREAD_CPUTIME }, { "_POSIX_THREAD_PRIO_INHERIT", _SC_THREAD_PRIO_INHERIT }, { "_POSIX_THREAD_PRIO_PROTECT", _SC_THREAD_PRIO_PROTECT }, { "_POSIX_THREAD_PRIORITY_SCHEDULING", _SC_THREAD_PRIORITY_SCHEDULING }, { "_POSIX_THREAD_PROCESS_SHARED", _SC_THREAD_PROCESS_SHARED }, { "_POSIX_THREAD_ROBUST_PRIO_INHERIT", _SC_THREAD_ROBUST_PRIO_INHERIT }, { "_POSIX_THREAD_ROBUST_PRIO_PROTECT", _SC_THREAD_ROBUST_PRIO_PROTECT }, { "_POSIX_THREAD_SAFE_FUNCTIONS", _SC_THREAD_SAFE_FUNCTIONS }, { "_POSIX_THREAD_SPORADIC_SERVER", _SC_THREAD_SPORADIC_SERVER }, { "_POSIX_THREADS", _SC_THREADS }, { "_POSIX_TIMEOUTS", _SC_TIMEOUTS }, { "_POSIX_TIMERS", _SC_TIMERS }, { "_POSIX_TRACE", _SC_TRACE }, { "_POSIX_TRACE_EVENT_FILTER", _SC_TRACE_EVENT_FILTER }, { "_POSIX_TRACE_EVENT_NAME_MAX", _SC_TRACE_EVENT_NAME_MAX }, { "_POSIX_TRACE_INHERIT", _SC_TRACE_INHERIT }, { "_POSIX_TRACE_LOG", _SC_TRACE_LOG }, { "_POSIX_TRACE_NAME_MAX", _SC_TRACE_NAME_MAX }, { "_POSIX_TRACE_SYS_MAX", _SC_TRACE_SYS_MAX }, { "_POSIX_TRACE_USER_EVENT_MAX", _SC_TRACE_USER_EVENT_MAX }, { "_POSIX_TYPED_MEMORY_OBJECTS", _SC_TYPED_MEMORY_OBJECTS }, { "_POSIX_VERSION", _SC_VERSION }, { "_POSIX_V7_ILP32_OFF32", _SC_V7_ILP32_OFF32 }, { "_POSIX_V7_ILP32_OFFBIG", _SC_V7_ILP32_OFFBIG }, { "_POSIX_V7_LP64_OFF64", _SC_V7_LP64_OFF64 }, { "_POSIX_V7_LPBIG_OFFBIG", _SC_V7_LPBIG_OFFBIG }, { "_POSIX_V6_ILP32_OFF32", _SC_V6_ILP32_OFF32 }, { "_POSIX_V6_ILP32_OFFBIG", _SC_V6_ILP32_OFFBIG }, { "_POSIX_V6_LP64_OFF64", _SC_V6_LP64_OFF64 }, { "_POSIX_V6_LPBIG_OFFBIG", _SC_V6_LPBIG_OFFBIG }, { "_POSIX2_C_BIND", _SC_2_C_BIND }, { "_POSIX2_C_DEV", _SC_2_C_DEV }, { "_POSIX2_CHAR_TERM", _SC_2_CHAR_TERM }, { "_POSIX2_FORT_DEV", _SC_2_FORT_DEV }, { "_POSIX2_FORT_RUN", _SC_2_FORT_RUN }, { "_POSIX2_LOCALEDEF", _SC_2_LOCALEDEF }, { "_POSIX2_PBS", _SC_2_PBS }, { "_POSIX2_PBS_ACCOUNTING", _SC_2_PBS_ACCOUNTING }, { "_POSIX2_PBS_CHECKPOINT", _SC_2_PBS_CHECKPOINT }, { "_POSIX2_PBS_LOCATE", _SC_2_PBS_LOCATE }, { "_POSIX2_PBS_MESSAGE", _SC_2_PBS_MESSAGE }, { "_POSIX2_PBS_TRACK", _SC_2_PBS_TRACK }, { "_POSIX2_SW_DEV", _SC_2_SW_DEV }, { "_POSIX2_UPE", _SC_2_UPE }, { "_POSIX2_VERSION", _SC_2_VERSION }, { "PAGE_SIZE", _SC_PAGE_SIZE }, { "PAGESIZE", _SC_PAGESIZE }, { "PTHREAD_DESTRUCTOR_ITERATIONS", _SC_THREAD_DESTRUCTOR_ITERATIONS }, { "PTHREAD_KEYS_MAX", _SC_THREAD_KEYS_MAX }, { "PTHREAD_STACK_MIN", _SC_THREAD_STACK_MIN }, { "PTHREAD_THREADS_MAX", _SC_THREAD_THREADS_MAX }, { "RE_DUP_MAX", _SC_RE_DUP_MAX }, { "RTSIG_MAX", _SC_RTSIG_MAX }, { "SEM_NSEMS_MAX", _SC_SEM_NSEMS_MAX }, { "SEM_VALUE_MAX", _SC_SEM_VALUE_MAX }, { "SIGQUEUE_MAX", _SC_SIGQUEUE_MAX }, { "STREAM_MAX", _SC_STREAM_MAX }, { "SYMLOOP_MAX", _SC_SYMLOOP_MAX }, { "TIMER_MAX", _SC_TIMER_MAX }, { "TTY_NAME_MAX", _SC_TTY_NAME_MAX }, { "TZNAME_MAX", _SC_TZNAME_MAX }, { "_XOPEN_CRYPT", _SC_XOPEN_CRYPT }, { "_XOPEN_ENH_I18N", _SC_XOPEN_ENH_I18N }, { "_XOPEN_REALTIME", _SC_XOPEN_REALTIME }, { "_XOPEN_REALTIME_THREADS", _SC_XOPEN_REALTIME_THREADS }, { "_XOPEN_SHM", _SC_XOPEN_SHM }, { "_XOPEN_STREAMS", _SC_XOPEN_STREAMS }, { "_XOPEN_UNIX", _SC_XOPEN_UNIX }, /* { "_XOPEN_UUCP", _SC_XOPEN_UUCP }, */ /* FIXME */ { "_XOPEN_VERSION", _SC_XOPEN_VERSION }, { 0, 0 }, }, confnames[] = { { "PATH", _CS_PATH }, { "POSIX_V7_ILP32_OFF32_CFLAGS", _CS_POSIX_V7_ILP32_OFF32_CFLAGS }, { "POSIX_V7_ILP32_OFF32_LDFLAGS", _CS_POSIX_V7_ILP32_OFF32_LDFLAGS }, { "POSIX_V7_ILP32_OFF32_LIBS", _CS_POSIX_V7_ILP32_OFF32_LIBS }, { "POSIX_V7_ILP32_OFFBIG_CFLAGS", _CS_POSIX_V7_ILP32_OFFBIG_CFLAGS }, { "POSIX_V7_ILP32_OFFBIG_LDFLAGS", _CS_POSIX_V7_ILP32_OFFBIG_LDFLAGS }, { "POSIX_V7_ILP32_OFFBIG_LIBS", _CS_POSIX_V7_ILP32_OFFBIG_LIBS }, { "POSIX_V7_LP64_OFF64_CFLAGS", _CS_POSIX_V7_LP64_OFF64_CFLAGS }, { "POSIX_V7_LP64_OFF64_LDFLAGS", _CS_POSIX_V7_LP64_OFF64_LDFLAGS }, { "POSIX_V7_LP64_OFF64_LIBS", _CS_POSIX_V7_LP64_OFF64_LIBS }, { "POSIX_V7_LPBIG_OFFBIG_CFLAGS", _CS_POSIX_V7_LPBIG_OFFBIG_CFLAGS }, { "POSIX_V7_LPBIG_OFFBIG_LDFLAGS", _CS_POSIX_V7_LPBIG_OFFBIG_LDFLAGS }, { "POSIX_V7_LPBIG_OFFBIG_LIBS", _CS_POSIX_V7_LPBIG_OFFBIG_LIBS }, /* { "POSIX_V7_THREADS_CFLAGS", _CS_POSIX_V7_THREADS_CFLAGS }, */ /* FIXME */ /* { "POSIX_V7_THREADS_LDFLAGS", _CS_POSIX_V7_THREADS_LDFLAGS }, */ /* FIXME */ { "POSIX_V7_WIDTH_RESTRICTED_ENVS", _CS_POSIX_V7_WIDTH_RESTRICTED_ENVS }, { "V7_ENV", _CS_V7_ENV }, { "POSIX_V6_ILP32_OFF32_CFLAGS", _CS_POSIX_V6_ILP32_OFF32_CFLAGS }, { "POSIX_V6_ILP32_OFF32_LDFLAGS", _CS_POSIX_V6_ILP32_OFF32_LDFLAGS }, { "POSIX_V6_ILP32_OFF32_LIBS", _CS_POSIX_V6_ILP32_OFF32_LIBS }, { "POSIX_V6_ILP32_OFFBIG_CFLAGS", _CS_POSIX_V6_ILP32_OFFBIG_CFLAGS }, { "POSIX_V6_ILP32_OFFBIG_LDFLAGS", _CS_POSIX_V6_ILP32_OFFBIG_LDFLAGS }, { "POSIX_V6_ILP32_OFFBIG_LIBS", _CS_POSIX_V6_ILP32_OFFBIG_LIBS }, { "POSIX_V6_LP64_OFF64_CFLAGS", _CS_POSIX_V6_LP64_OFF64_CFLAGS }, { "POSIX_V6_LP64_OFF64_LDFLAGS", _CS_POSIX_V6_LP64_OFF64_LDFLAGS }, { "POSIX_V6_LP64_OFF64_LIBS", _CS_POSIX_V6_LP64_OFF64_LIBS }, { "POSIX_V6_LPBIG_OFFBIG_CFLAGS", _CS_POSIX_V6_LPBIG_OFFBIG_CFLAGS }, { "POSIX_V6_LPBIG_OFFBIG_LDFLAGS", _CS_POSIX_V6_LPBIG_OFFBIG_LDFLAGS }, { "POSIX_V6_LPBIG_OFFBIG_LIBS", _CS_POSIX_V6_LPBIG_OFFBIG_LIBS }, { "POSIX_V6_WIDTH_RESTRICTED_ENVS", _CS_POSIX_V6_WIDTH_RESTRICTED_ENVS }, { "V6_ENV", _CS_V6_ENV }, { 0, 0 }, /* TODO: } limitnames[] = { { 0, 0 }, */ }; int getnum(const char *name, struct namelist *names) { for (size_t i = 0; names[i].name; i++) { if (!strcmp(name, names[i].name)) { return names[i].num; } } return -1; } int main(int argc, char *argv[]) { int c; while ((c = getopt(argc, argv, "v:")) != -1) { switch (c) { case 'v': /** get values for specification [version] **/ /* TODO */ break; default: return 1; } } if (optind >= argc) { fprintf(stderr, "getconf: System variable or path variable and path name required\n"); return 1; } if (optind == argc - 2) { long value = pathconf(argv[optind + 1], getnum(argv[optind], pathnames)); printf("%ld\n", value); return 0; } int setting = getnum(argv[optind], sysnames); if (setting != -1) { long value = sysconf(setting); printf("%ld\n", value); return 0; } setting = getnum(argv[optind], confnames); if (setting != -1) { size_t n = confstr(setting, NULL, 0); char value[n + 1]; confstr(setting, value, n); printf("%s\n", value); return 0; } fprintf(stderr, "getconf: Setting '%s' not found\n", argv[optind]); return 0; }