From 7e0f021a9aec35fd8e6725e87e3313b101d26f5e Mon Sep 17 00:00:00 2001 From: Tobias Klauser Date: Sun, 27 Jan 2008 11:37:44 +0100 Subject: Initial import (2.0.2-6) --- reference/C/MAN/sysconf.htm | 233 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 233 insertions(+) create mode 100644 reference/C/MAN/sysconf.htm (limited to 'reference/C/MAN/sysconf.htm') diff --git a/reference/C/MAN/sysconf.htm b/reference/C/MAN/sysconf.htm new file mode 100644 index 0000000..f09ca21 --- /dev/null +++ b/reference/C/MAN/sysconf.htm @@ -0,0 +1,233 @@ +sysconf + +
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SYSCONF(3)          Linux Programmer's Manual          SYSCONF(3)
+

+
+
NAME
+
       sysconf - Get configuration information at runtime
+
+
SYNOPSIS
+
       #include <unistd.h>
+
+       long sysconf(int name);
+
+
DESCRIPTION
+
       sysconf()  provides a way for the application to determine
+       values for system limits or options at runtime.
+
+       The equivalent macros defined in <unistd.h> can only  give
+       conservative  values;  if  an  application  wants  to take
+       advantage of values which may change, a call to  sysconf()
+       can be made, which may yield more liberal results.
+
+       For  getting  information  about  a  particular  file, see
+       fpathconf() or pathconf().
+
+       The following values are supported for name.   First,  the
+       POSIX.1 compatible values:
+
+       _SC_ARG_MAX
+              The  maximum  length of the arguments to the exec()
+              family of functions;  the  corresponding  macro  is
+              ARG_MAX.
+
+       _SC_CHILD_MAX
+              The  number  of simultaneous processes per user id,
+              the corresponding macro is _POSIX_CHILD_MAX.
+
+       _SC_CLK_TCK
+              The number of clock ticks per  second;  the  corre-
+              sponding macro is CLK_TCK.
+
+       _SC_STREAM_MAX
+              The  maximum  number  of streams that a process can
+              have open at any  time.   The  corresponding  POSIX
+              macro  is  STREAM_MAX, the corresponding standard C
+              macro is FOPEN_MAX.
+
+       _SC_TZNAME_MAX
+              The maximum number of bytes in a timezone name, the
+              corresponding macro is TZNAME_MAX.
+
+       _SC_OPEN_MAX
+              The maximum number of files that a process can have
+              open  at  any  time,  the  corresponding  macro  is
+              _POSIX_OPEN_MAX.
+
+       _SC_JOB_CONTROL
+              This indicates whether POSIX - style job control is
+              supported,    the    corresponding     macro     is
+
+
+
+
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SYSCONF(3)          Linux Programmer's Manual          SYSCONF(3)
+

+
+              _POSIX_JOB_CONTROL.
+
+       _SC_SAVED_IDS
+              This  indicates  whether a process has a saved set-
+              user-ID and a saved set-group-ID; the corresponding
+              macro is _POSIX_SAVED_IDS.
+
+       _SC_VERSION
+              indicates  the  year and month the POSIX.1 standard
+              was  approved  in  the  format  YYYYMML;the   value
+              199009L indicates the most recent revision, 1990.
+
+       Next, the POSIX.2 values:
+
+       _SC_BC_BASE_MAX
+              indicates  the  maximum obase value accepted by the
+              bc(1)   utility;   the   corresponding   macro   is
+              BC_BASE_MAX.
+
+       _SC_BC_DIM_MAX
+              indicates  the  maximum value of elements permitted
+              in an array by bc(1); the  corresponding  macro  is
+              BC_DIM_MAX.
+
+       _SC_BC_SCALE_MAX
+              indicates the maximum scale value allowed by bc(1);
+              the corresponding macro is BC_SCALE_MAX.
+
+       _SC_BC_STRING_MAX
+              indicates the maximum length of a  string  accepted
+              by bc(1); the corresponding macro is BC_STRING_MAX.
+
+       _SC_COLL_WEIGHTS_MAX
+              indicates the maximum numbers of weights  that  can
+              be  assigned  to  an  entry of the LC_COLLATE order
+              keyword in the locale definition file;  the  corre-
+              sponding macro is COLL_WEIGHTS_MAX.
+
+       _SC_EXPR_NEST_MAX
+              is  the  maximum number of expressions which can be
+              nested within parentheses by expr(1).   The  corre-
+              sponding macro is EXPR_NEST_MAX.
+
+       _SC_LINE_MAX
+              The  maximum  length  of  a  utility's  input  line
+              length, either from standard input or from a  file.
+              This  includes  length for a trailing newline.  The
+              corresponding macro is LINE_MAX.
+
+       _SC_RE_DUP_MAX
+              The maximum number of  repeated  occurrences  of  a
+              regular   expression  when  the  interval  notation
+              \{m,n\} is used. The  value  of  the  corresponding
+              macro is RE_DUP_MAX.
+
+
+
+
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SYSCONF(3)          Linux Programmer's Manual          SYSCONF(3)
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+       _SC_2_VERSION
+              indicates  the  version  of the POSIX.2 standard in
+              the format of YYYYMML.  The corresponding macro  is
+              POSIX2_VERSION.
+
+       _SC_2_DEV
+              indicates  whether  the POSIX.2 C language develop-
+              ment facilities are supported.   The  corresponding
+              macro is POSIX2_C_DEV.
+
+       _SC_2_FORT_DEV
+              indicates  whether  the POSIX.2 FORTRAN development
+              utilities are supported.  The  corresponding  macro
+              is POSIX2_FORT_RUN.
+
+       _SC_2_FORT_RUN
+              indicates whether the POSIX.2 FORTRAN runtime util-
+              ities are supported.  The  corresponding  macro  is
+              POSIX2_FORT_RUN.
+
+       POSIX2_LOCALEDEF
+              indicates  whether  the POSIX.2 creation of locates
+              via  locale(1)  is  supported.   The  corresponding
+              macro is POSIX2_LOCALEDEF.
+
+       _SC_2_SW_DEV
+              indicates  whether the POSIX.2 software development
+              utilities option is supported.   The  corresponding
+              macro is POSIX2_SW_DEV.
+
+
RETURN VALUE
+
       The  value returned is the value of the system resource, 1
+       if a queried option is available, 0 if it is not, or -1 on
+       error.  The variable errno is not set.
+
+
CONFORMS TO
+
       POSIX.1, proposed POSIX.2
+
+
BUGS
+
       It  is  difficult  use ARG_MAX because it is not specified
+       how much of the argument space for exec() is  consumed  by
+       the user's environment variables.
+
+       Some  returned  values  may be huge; they are not suitable
+       for allocating memory.
+
+       POSIX.2 is not yet an approved standard;  the  information
+       in this manpage is subject to change.
+
+
+
+

SEE ALSO +

+bc, +expr, +locale, +fpathconf, +pathconf, +

+
+
+
+
+
+
+
GNU                       April 18, 1993                        3
+

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+

+

+

+

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