commit 05996b997c448f81d8e183c03598413500502a10
parent 98e7e75ec6e847249e19521dfac3c1674af45721
Author: FRIGN <dev@frign.de>
Date: Thu, 1 Oct 2015 00:59:40 +0200
Add getconf(1)
The logic is simple, it's just a pain in the ass to fill the
data-structures.
Some lines had to be commented out, as glibc/musl apparently
have not fully implemented the mandatory variables for the
2013 corrigendum of POSIX 2008.
Also added a manpage and the necessary entries in README.
I also removed it from the TODO.
Diffstat:
| M | Makefile | | | 1 | + |
| M | README | | | 1 | + |
| M | TODO | | | 1 | - |
| A | getconf.1 | | | 59 | +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
| A | getconf.c | | | 314 | +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
5 files changed, 375 insertions(+), 1 deletion(-)
diff --git a/Makefile b/Makefile
@@ -98,6 +98,7 @@ BIN =\
false\
find\
fold\
+ getconf\
grep\
head\
join\
diff --git a/README b/README
@@ -36,6 +36,7 @@ The following tools are implemented:
=*|o false .
= find .
#*|o fold .
+=* o getconf (-v)
=* o grep .
=*|o head .
=*|x hostname .
diff --git a/TODO b/TODO
@@ -8,7 +8,6 @@ awk
bc
diff
ed
-getconf
install
patch
pathchk
diff --git a/getconf.1 b/getconf.1
@@ -0,0 +1,59 @@
+.Dd October 1, 2015
+.Dt GETCONF 1
+.Os sbase
+.Sh NAME
+.Nm getconf
+.Nd get configuration values
+.Sh SYNOPSIS
+.Nm
+.Op Fl v Ar spec
+.Ar var
+.Ar [path]
+.Sh DESCRIPTION
+.Nm
+writes the value of the variable
+.Ar var
+to stdout.
+.sp
+If
+.Ar path
+is given,
+.Ar var
+is matched against configuration values from
+.Xr pathconf 3 .
+If
+.Ar path
+is not given,
+.Ar var
+is matched against configuration values from
+.Xr sysconf 3 ,
+.Xr confstr 3
+and limits.h (Minimum and Maximum).
+.sp
+If
+.Ar var
+is not defined or has not been found,
+.Nm
+writes "undefined" to stdout.
+.Sh OPTIONS
+.Bl -tag -width Ds
+.It Fl v Ar spec
+Ignored.
+.El
+.Sh EXIT STATUS
+.Bl -tag -width Ds
+.It 0
+.Ar var
+was matched and its value written successfully.
+.It 1
+An error occured or
+.Ar var
+was neither defined nor found.
+.Sh STANDARDS
+The
+.Nm
+utility is compliant with the
+.St -p1003.1-2013
+specification except from the
+.Op Fl v
+flag.
diff --git a/getconf.c b/getconf.c
@@ -0,0 +1,314 @@
+/* See LICENSE file for copyright and license details. */
+#include <errno.h>
+#include <unistd.h>
+#include <limits.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "util.h"
+
+struct var {
+ const char *k;
+ long v;
+};
+
+static const struct var pathconf_l[] = {
+ { "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 },*/
+};
+
+static const struct var sysconf_l[] = {
+ { "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 },
+ { "_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 },*/
+ { "_XOPEN_VERSION", _SC_XOPEN_VERSION },
+};
+
+static const struct var confstr_l[] = {
+ { "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 },*/
+ /*{ "POSIX_V7_THREADS_LDFLAGS", _CS_POSIX_V7_THREADS_LDFLAGS },*/
+ { "POSIX_V7_WIDTH_RESTRICTED_ENVS", _CS_POSIX_V7_WIDTH_RESTRICTED_ENVS },
+ /*{ "V7_ENV", _CS_V7_ENV },*/
+};
+
+static const struct var limits_l[] = {
+ { "_POSIX_CLOCKRES_MIN", _POSIX_CLOCKRES_MIN },
+ { "_POSIX_AIO_LISTIO_MAX", _POSIX_AIO_LISTIO_MAX },
+ { "_POSIX_AIO_MAX", _POSIX_AIO_MAX },
+ { "_POSIX_ARG_MAX", _POSIX_ARG_MAX },
+ { "_POSIX_CHILD_MAX", _POSIX_CHILD_MAX },
+ { "_POSIX_DELAYTIMER_MAX", _POSIX_DELAYTIMER_MAX },
+ { "_POSIX_HOST_NAME_MAX", _POSIX_HOST_NAME_MAX },
+ { "_POSIX_LINK_MAX", _POSIX_LINK_MAX },
+ { "_POSIX_LOGIN_NAME_MAX", _POSIX_LOGIN_NAME_MAX },
+ { "_POSIX_MAX_CANON", _POSIX_MAX_CANON },
+ { "_POSIX_MAX_INPUT", _POSIX_MAX_INPUT },
+ { "_POSIX_MQ_OPEN_MAX", _POSIX_MQ_OPEN_MAX },
+ { "_POSIX_MQ_PRIO_MAX", _POSIX_MQ_PRIO_MAX },
+ { "_POSIX_NAME_MAX", _POSIX_NAME_MAX },
+ { "_POSIX_NGROUPS_MAX", _POSIX_NGROUPS_MAX },
+ { "_POSIX_OPEN_MAX", _POSIX_OPEN_MAX },
+ { "_POSIX_PATH_MAX", _POSIX_PATH_MAX },
+ { "_POSIX_PIPE_BUF", _POSIX_PIPE_BUF },
+ { "_POSIX_RE_DUP_MAX", _POSIX_RE_DUP_MAX },
+ { "_POSIX_RTSIG_MAX", _POSIX_RTSIG_MAX },
+ { "_POSIX_SEM_NSEMS_MAX", _POSIX_SEM_NSEMS_MAX },
+ { "_POSIX_SEM_VALUE_MAX", _POSIX_SEM_VALUE_MAX },
+ { "_POSIX_SIGQUEUE_MAX", _POSIX_SIGQUEUE_MAX },
+ { "_POSIX_SSIZE_MAX", _POSIX_SSIZE_MAX },
+ /*{ "_POSIX_SS_REPL_MAX", _POSIX_SS_REPL_MAX },*/
+ { "_POSIX_STREAM_MAX", _POSIX_STREAM_MAX },
+ { "_POSIX_SYMLINK_MAX", _POSIX_SYMLINK_MAX },
+ { "_POSIX_SYMLOOP_MAX", _POSIX_SYMLOOP_MAX },
+ { "_POSIX_THREAD_DESTRUCTOR_ITERATIONS", _POSIX_THREAD_DESTRUCTOR_ITERATIONS },
+ { "_POSIX_THREAD_KEYS_MAX", _POSIX_THREAD_KEYS_MAX },
+ { "_POSIX_THREAD_THREADS_MAX", _POSIX_THREAD_THREADS_MAX },
+ { "_POSIX_TIMER_MAX", _POSIX_TIMER_MAX },
+ { "_POSIX_TTY_NAME_MAX", _POSIX_TTY_NAME_MAX },
+ { "_POSIX_TZNAME_MAX", _POSIX_TZNAME_MAX },
+ { "_POSIX2_BC_BASE_MAX", _POSIX2_BC_BASE_MAX },
+ { "_POSIX2_BC_DIM_MAX", _POSIX2_BC_DIM_MAX },
+ { "_POSIX2_BC_SCALE_MAX", _POSIX2_BC_SCALE_MAX },
+ { "_POSIX2_BC_STRING_MAX", _POSIX2_BC_STRING_MAX },
+ { "_POSIX2_CHARCLASS_NAME_MAX", _POSIX2_CHARCLASS_NAME_MAX },
+ { "_POSIX2_COLL_WEIGHTS_MAX", _POSIX2_COLL_WEIGHTS_MAX },
+ { "_POSIX2_EXPR_NEST_MAX", _POSIX2_EXPR_NEST_MAX },
+ { "_POSIX2_LINE_MAX", _POSIX2_LINE_MAX },
+ { "_POSIX2_RE_DUP_MAX", _POSIX2_RE_DUP_MAX },
+};
+
+void
+usage(void)
+{
+ eprintf("%s -v spec arc arco\n", argv0);
+}
+
+int
+main(int argc, char *argv[])
+{
+ size_t len;
+ long res;
+ int i;
+ char *str;
+
+ ARGBEGIN {
+ case 'v':
+ /* ignore */
+ (void)(EARGF(usage()));
+ break;
+ } ARGEND;
+
+ if (argc == 1) {
+ /* sysconf */
+ for (i = 0; i < LEN(sysconf_l); i++) {
+ if (strcmp(argv[0], sysconf_l[i].k))
+ continue;
+ errno = 0;
+ if ((res = sysconf(sysconf_l[i].v)) < 0) {
+ if (errno)
+ eprintf("sysconf %ld:", sysconf_l[i].v);
+ puts("undefined");
+ } else {
+ printf("%ld\n", res);
+ }
+ return 0;
+ }
+ /* confstr */
+ for (i = 0; i < LEN(confstr_l); i++) {
+ if (strcmp(argv[0], confstr_l[i].k))
+ continue;
+ errno = 0;
+ if (!(len = confstr(confstr_l[i].v, NULL, 0))) {
+ if (errno)
+ eprintf("confstr %ld:", confstr_l[i].v);
+ puts("undefined");
+ } else {
+ str = emalloc(len);
+ errno = 0;
+ if (!confstr(confstr_l[i].v, str, len)) {
+ if (errno)
+ eprintf("confstr %ld:", confstr_l[i].v);
+ puts("undefined");
+ } else {
+ puts(str);
+ }
+ free(str);
+ }
+ return 0;
+ }
+ /* limits */
+ for (i = 0; i < LEN(limits_l); i++) {
+ if (strcmp(argv[0], limits_l[i].k))
+ continue;
+ printf("%ld\n", limits_l[i].v);
+ return 0;
+ }
+ } else if (argc == 2) {
+ /* pathconf */
+ for (i = 0; i < LEN(pathconf_l); i++) {
+ if (strcmp(argv[0], pathconf_l[i].k))
+ continue;
+ errno = 0;
+ if ((res = pathconf(argv[1], pathconf_l[i].v)) < 0) {
+ if (errno)
+ eprintf("pathconf %ld:", pathconf_l[i].v);
+ puts("undefined");
+ } else {
+ printf("%ld\n", res);
+ }
+ return 0;
+ }
+ } else {
+ usage();
+ }
+
+ puts("undefined");
+
+ return 1;
+}
