diff options
| -rw-r--r-- | getconf.c | 268 |
1 files changed, 268 insertions, 0 deletions
diff --git a/getconf.c b/getconf.c new file mode 100644 index 0000000..edaf11e --- /dev/null +++ b/getconf.c @@ -0,0 +1,268 @@ +/* + * UNG's Not GNU + * + * Copyright (c) 2011-2017, Jakob Kaivo <jkk@ung.org> + * + * 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 <limits.h> +#include <stdio.h> +#include <string.h> +#include <unistd.h> + +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; +} |