diff options
| -rwxr-xr-x | scripts/make.sh | 36 | ||||
| -rw-r--r-- | toys/posix/getconf.c | 144 |
2 files changed, 180 insertions, 0 deletions
diff --git a/scripts/make.sh b/scripts/make.sh index 993bcd33..1119ed9d 100755 --- a/scripts/make.sh +++ b/scripts/make.sh @@ -262,6 +262,42 @@ then generated/config2help Config.in $KCONFIG_CONFIG > generated/help.h || exit 1 fi +mksysconf() +{ + echo "int ${1}_vals[] = {" && + + # Extract names, remove blank lines, filter, replace unknown #defines + # with UNKNOWN + sed -n "/char [*]${1}_names[[]/"',/^}/s/[^"]*"\([^"]*\) *",*/\1\n/pg' \ + toys/posix/getconf.c | grep -v '^$' | $2 | + sed -e "$DEFINES" -e "t;d;a UNKNOWN" | xargs | tr ' ' ',' && + echo '};' +} + +if ! [ generated/getconf.h -nt toys/posix/getconf.c ] +then + echo generated/getconf.h + + # Dump #define list for limits.h and unistd.h, create sed expression to + # match known defines + DEFINES="$(echo -e '#include <limits.h>\n#include <unistd.h>' | \ + gcc -E -dM - | \ + sed -n 's@^#define[ \t][ \t]*\([^ \t(]*\)[ \t].*@s/^\1$/\&/@p' )" + + # Extract limit names, compare against limits.h #defines, replace unknown + # ones with UNKNOWN + + { + mksysconf sysconf \ + sed\ 's/^_POSIX2/2/;s/^PTHREAD/THREAD/;s/^_POSIX_//;s/^_XOPEN_/XOPEN_/;s/^/_SC_/' && + mksysconf confstr sed\ 's/.*/_CS_&/' && + mksysconf limit cat + } > generated/getconf.h + + unset HEADERS +fi + + [ ! -z "$NOBUILD" ] && exit 0 echo -n "Compile toybox" diff --git a/toys/posix/getconf.c b/toys/posix/getconf.c new file mode 100644 index 00000000..adc96e64 --- /dev/null +++ b/toys/posix/getconf.c @@ -0,0 +1,144 @@ +/* getconf.c - get configuration values + * + * Copyright 2017 Rob Landley <rob@landley.net> + * + * See http://pubs.opengroup.org/onlinepubs/9699919799/utilities/getconf.c + * + * Deviations from posix: no -v because nothing says what it should DO. + +USE_GETCONF(NEWTOY(getconf, "l", TOYFLAG_USR|TOYFLAG_BIN)) + +config GETCONF + bool "getconf" + default y + help + usage: getconf [-l] [NAME...] + + Get system configuration values. + + -l List available value names +*/ + +#define FOR_getconf +#include "toys.h" +#include <limits.h> + +// make.sh calls sed on this file (getconf.c) to extract symbols from our three +// XXX_names arrays and matches them with #defines in limits.h and unistd.h to +// produce getconf.h, which contains corresponding XXX_values[] arrays +// with the appropriate constants or -1 for unknown entries. + +#define UNKNOWN -1 +#include "generated/getconf.h" + +// Lists of symbols getconf can query, broken down by whether we call sysconf(), +// getconf(), or output the macro value directly. + +// Probe the live system +char *sysconf_names[] = { + /* POSIX */ + "_POSIX_ADVISORY_INFO", "_POSIX_BARRIERS", "_POSIX_ASYNCHRONOUS_IO", + "_POSIX_CLOCK_SELECTION", "_POSIX_CPUTIME", "_POSIX_FSYNC", "_POSIX_IPV6", + "_POSIX_JOB_CONTROL", "_POSIX_MAPPED_FILES", "_POSIX_MEMLOCK", + "_POSIX_MEMLOCK_RANGE", "_POSIX_MEMORY_PROTECTION", "_POSIX_MESSAGE_PASSING", + "_POSIX_MONOTONIC_CLOCK", "_POSIX_PRIORITIZED_IO", + "_POSIX_PRIORITY_SCHEDULING", "_POSIX_RAW_SOCKETS", + "_POSIX_READER_WRITER_LOCKS", "_POSIX_REALTIME_SIGNALS", "_POSIX_REGEXP", + "_POSIX_SAVED_IDS", "_POSIX_SEMAPHORES", "_POSIX_SHARED_MEMORY_OBJECTS", + "_POSIX_SHELL", "_POSIX_SPAWN", "_POSIX_SPIN_LOCKS", "_POSIX_SPORADIC_SERVER", + "_POSIX_SS_REPL_MAX", "_POSIX_SYNCHRONIZED_IO", + "_POSIX_THREAD_ATTR_STACKADDR", "_POSIX_THREAD_ATTR_STACKSIZE", + "_POSIX_THREAD_CPUTIME", "_POSIX_THREAD_PRIO_INHERIT", + "_POSIX_THREAD_PRIO_PROTECT", "_POSIX_THREAD_PRIORITY_SCHEDULING", + "_POSIX_THREAD_PROCESS_SHARED", "_POSIX_THREAD_ROBUST_PRIO_INHERIT", + "_POSIX_THREAD_ROBUST_PRIO_PROTECT", "_POSIX_THREAD_SAFE_FUNCTIONS", + "_POSIX_THREAD_SPORADIC_SERVER", "_POSIX_THREADS", "_POSIX_TIMEOUTS", + "_POSIX_TIMERS", "_POSIX_TRACE", "_POSIX_TRACE_EVENT_FILTER", + "_POSIX_TRACE_EVENT_NAME_MAX", "_POSIX_TRACE_INHERIT", "_POSIX_TRACE_LOG", + "_POSIX_TRACE_NAME_MAX", "_POSIX_TRACE_SYS_MAX", + "_POSIX_TRACE_USER_EVENT_MAX", "_POSIX_TYPED_MEMORY_OBJECTS", + "_POSIX_VERSION", "_POSIX_V7_ILP32_OFF32", "_POSIX_V7_ILP32_OFFBIG", + "_POSIX_V7_LP64_OFF64", "_POSIX_V7_LPBIG_OFFBIG", + + /* POSIX.2 */ + "_POSIX2_C_BIND", "_POSIX2_C_DEV", "_POSIX2_CHAR_TERM", "_POSIX2_FORT_DEV", + "_POSIX2_FORT_RUN", "_POSIX2_LOCALEDEF", "_POSIX2_PBS", + "_POSIX2_PBS_ACCOUNTING", "_POSIX2_PBS_CHECKPOINT", "_POSIX2_PBS_LOCATE", + "_POSIX2_PBS_MESSAGE", "_POSIX2_PBS_TRACK", "_POSIX2_SW_DEV", "_POSIX2_UPE", + "_POSIX2_VERSION", + + /* X/Open */ + "_XOPEN_CRYPT", "_XOPEN_ENH_I18N", "_XOPEN_REALTIME", + "_XOPEN_REALTIME_THREADS", "_XOPEN_SHM", "_XOPEN_STREAMS", "_XOPEN_UNIX", + "_XOPEN_UUCP", "_XOPEN_VERSION", + + /* No obvious standard */ + "AIO_LISTIO_MAX", "AIO_MAX", "AIO_PRIO_DELTA_MAX", "ARG_MAX", "ATEXIT_MAX", + "BC_BASE_MAX", "BC_DIM_MAX", "BC_SCALE_MAX", "BC_STRING_MAX", "CHILD_MAX", + "COLL_WEIGHTS_MAX", "DELAYTIMER_MAX", "EXPR_NEST_MAX", "HOST_NAME_MAX", + "IOV_MAX", "LINE_MAX", "LOGIN_NAME_MAX", "NGROUPS_MAX", "MQ_OPEN_MAX", + "MQ_PRIO_MAX", "OPEN_MAX", "PAGE_SIZE", "PAGESIZE", + "PTHREAD_DESTRUCTOR_ITERATIONS", "PTHREAD_KEYS_MAX", "PTHREAD_STACK_MIN", + "PTHREAD_THREADS_MAX", "RE_DUP_MAX", "RTSIG_MAX", "SEM_NSEMS_MAX", + "SEM_VALUE_MAX", "SIGQUEUE_MAX", "STREAM_MAX", "SYMLOOP_MAX", "TIMER_MAX", + "TTY_NAME_MAX", "TZNAME_MAX", "NPROCESSORS_CONF", "NPROCESSORS_ONLN" +}; + +// Strings out of a header +char *confstr_names[] = { + "PATH", "V7_ENV" +}; + +// Integers out of a header +char *limit_names[] = { + "_POSIX_AIO_LISTIO_MAX", "_POSIX_AIO_MAX", "_POSIX_ARG_MAX", + "_POSIX_CHILD_MAX", "_POSIX_DELAYTIMER_MAX", "_POSIX_HOST_NAME_MAX", + "_POSIX_LINK_MAX", "_POSIX_LOGIN_NAME_MAX", "_POSIX_MAX_CANON", + "_POSIX_MAX_INPUT", "_POSIX_NAME_MAX", "_POSIX_NGROUPS_MAX", + "_POSIX_OPEN_MAX", "_POSIX_PATH_MAX", "_POSIX_PIPE_BUF", "_POSIX_RE_DUP_MAX", + "_POSIX_RTSIG_MAX", "_POSIX_SEM_NSEMS_MAX", "_POSIX_SEM_VALUE_MAX", + "_POSIX_SIGQUEUE_MAX", "_POSIX_SSIZE_MAX", "_POSIX_STREAM_MAX", + "_POSIX_SYMLINK_MAX", "_POSIX_SYMLOOP_MAX", + "_POSIX_THREAD_DESTRUCTOR_ITERATIONS", "_POSIX_THREAD_KEYS_MAX", + "_POSIX_THREAD_THREADS_MAX", "_POSIX_TIMER_MAX", "_POSIX_TTY_NAME_MAX", + "_POSIX_TZNAME_MAX", "_POSIX2_BC_BASE_MAX", "_POSIX2_BC_DIM_MAX", + "_POSIX2_BC_SCALE_MAX", "_POSIX2_BC_STRING_MAX", "_POSIX2_CHARCLASS_NAME_MAX", + "_POSIX2_COLL_WEIGHTS_MAX", "_POSIX2_EXPR_NEST_MAX", "_POSIX2_LINE_MAX", + "_POSIX2_RE_DUP_MAX" +}; + +void getconf_main(void) +{ + char **names[] = {sysconf_names, confstr_names, limit_names}, + **args; + int i, j, lens[] = {ARRAY_LEN(sysconf_names), + ARRAY_LEN(confstr_names), ARRAY_LEN(limit_names)}; + + if (toys.optflags&FLAG_l) { + for (i = 0; i<3; i++) for (j = 0; j<lens[i]; j++) puts(names[i][j]); + + return; + } + + for (args = toys.optargs; *args; args++) { + char *name = *args; + + // Workaround for autogen using CS_PATH instead of PATH + if (!strcmp("CS_PATH", name)) name += 3; + + for (i = 0; i<3; i++) for (j = 0; j<lens[i]; j++) { + if (strcmp(names[i][j], name)) continue; + + if (!i) printf("%ld\n", sysconf(sysconf_vals[j])); + else if (i==1) { + confstr(confstr_vals[j], toybuf, sizeof(toybuf)); + puts(toybuf); + } else printf("%d\n", limit_vals[j]); + + goto cont; + } + error_msg("bad '%s'", name); +cont: + ; + } +} |