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system_data_types.7: srcfix 

The contents of each type are a logical block that is indented as
a block.  They are not separate paragraphs that happen to be
indented separately, but a set of continuous paragraphs, all at
the same level, indented as a block from the list entry--the name
of the type--.  Therefore, it makes more sense to use block
indentation, represented by .RS/.RE, rather than indenting each
paragraph separately.  That way it's also easier to further indent
a separate paragraph inside a block, which happens for example in
the case of float_t & double_t.  It's simply much easier now to
use .IP specifically in those cases where you want to indent just
a single paragraph.

Also added an ending separator comment line just after the last
type.

[mtk: minor edits to commit message]

Signed-off-by: Alejandro Colomar <colomar.6.4.3@gmail.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
This commit is contained in:
Alejandro Colomar 2020-09-25 13:28:23 +02:00 committed by Michael Kerrisk
parent 0c3e8eb330
commit 156e30baa6
1 changed files with 192 additions and 139 deletions
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331
man7/system_data_types.7
View File

@ -65,10 +65,11 @@ system_data_types \- overview of system data types
.\"------------------------------------- aiocb ------------------------/
.TP
.I aiocb
.IP
.RS
.PP
Include:
.IR <aio.h> .
.IP
.PP
.EX
struct aiocb {
int aio_fildes; /* File descriptor */
@ -80,12 +81,12 @@ struct aiocb {
int aio_lio_opcode;/* Operation to be performed */
};
.EE
.IP
.PP
For further information about this structure, see
.BR aio (7).
.IP
.PP
Conforming to: POSIX.1-2001 and later.
.IP
.PP
See also:
.BR aio_cancel (3),
.BR aio_error (3),
@ -95,42 +96,45 @@ See also:
.BR aio_suspend (3),
.BR aio_write (3),
.BR lio_listio (3)
.RE
.\"------------------------------------- div_t ------------------------/
.TP
.I div_t
.IP
.RS
.PP
Include:
.IR <stdlib.h> .
.IP
.PP
.EX
typedef struct {
int quot; /* Quotient */
int rem; /* Remainder */
} div_t;
.EE
.IP
.PP
It is the type of the value returned by the
.BR div (3)
function.
.IP
.PP
Conforming to: C99 and later; POSIX.1-2001 and later.
.IP
.PP
See also:
.BR div (3)
.RE
.\"------------------------------------- double_t ---------------------/
.TP
.I double_t
.IP
.RS
.PP
Include:
.IR <math.h> .
.IP
.PP
The implementation's most efficient floating type at least as wide as
.IR double .
Its type depends on the value of the macro
.BR FLT_EVAL_METHOD ,
defined in
.IR <float.h> :
.RS
.TP
0
.I double_t
@ -152,57 +156,61 @@ For other values of
the type of
.I double_t
is implementation-defined.
.RE
.IP
.PP
Conforming to: C99 and later; POSIX.1-2001 and later.
.IP
.PP
See also the
.I float_t
type in this page.
.RE
.\"------------------------------------- fenv_t -----------------------/
.TP
.I fenv_t
.IP
.RS
.PP
Include:
.IR <fenv.h> .
.IP
.PP
This type represents the entire floating-point environment,
including control modes and status flags; for further details, see
.BR fenv (3).
.IP
.PP
Conforming to: C99 and later; POSIX.1-2001 and later.
.IP
.PP
See also:
.BR fenv (3)
.RE
.\"------------------------------------- fexcept_t --------------------/
.TP
.I fexcept_t
.IP
.RS
.PP
Include:
.IR <fenv.h> .
.IP
.PP
This type represents the floating-point status flags collectively;
for further details see
.BR fenv (3).
.IP
.PP
Conforming to: C99 and later; POSIX.1-2001 and later.
.IP
.PP
See also:
.BR fenv (3)
.RE
.\"------------------------------------- float_t ----------------------/
.TP
.I float_t
.IP
.RS
.PP
Include:
.IR <math.h> .
.IP
.PP
The implementation's most efficient floating type at least as wide as
.IR float .
Its type depends on the value of the macro
.BR FLT_EVAL_METHOD ,
defined in
.IR <float.h> :
.RS
.TP
0
.I float_t
@ -224,17 +232,18 @@ For other values of
the type of
.I float_t
is implementation-defined.
.RE
.IP
.PP
Conforming to: C99 and later; POSIX.1-2001 and later.
.IP
.PP
See also the
.I double_t
type in this page.
.RE
.\"------------------------------------- gid_t ------------------------/
.TP
.I gid_t
.IP
.RS
.PP
Include:
.IR <sys/types.h> ;
or
@ -251,13 +260,13 @@ or
.I <sys/stat.h>
or
.IR <unistd.h> .
.IP
.PP
A type used to hold group IDs.
According to POSIX,
this shall be an integer type.
.IP
.PP
Conforming to: POSIX.1-2001 and later.
.IP
.PP
See also:
.BR chown (2),
.BR getgid (2),
@ -266,15 +275,17 @@ See also:
.BR getresgid (2),
.BR getgrnam (2),
.BR credentials (7)
.RE
.\"------------------------------------- id_t -------------------------/
.TP
.I id_t
.IP
.RS
.PP
Include:
.IR <sys/types.h> ;
or
.IR <sys/resource.h> .
.IP
.PP
A type used to hold a general identifier.
According to POSIX,
this shall be an integer type that can be used to contain a
@ -282,41 +293,45 @@ this shall be an integer type that can be used to contain a
.IR uid_t ,
or
.IR gid_t .
.IP
.PP
Conforming to: POSIX.1-2001 and later.
.IP
.PP
See also:
.BR getpriority (2),
.BR waitid (2)
.RE
.\"------------------------------------- imaxdiv_t --------------------/
.TP
.I imaxdiv_t
.IP
.RS
.PP
Include:
.IR <inttypes.h> .
.IP
.PP
.EX
typedef struct {
intmax_t quot; /* Quotient */
intmax_t rem; /* Remainder */
} imaxdiv_t;
.EE
.IP
.PP
It is the type of the value returned by the
.BR imaxdiv (3)
function.
.IP
.PP
Conforming to: C99 and later; POSIX.1-2001 and later.
.IP
.PP
See also:
.BR imaxdiv (3)
.RE
.\"------------------------------------- lconv ------------------------/
.TP
.I lconv
.IP
.RS
.PP
Include:
.IR <locale.h> .
.IP
.PP
.EX
struct lconv { /* Values in the "C" locale: */
char *decimal_point; /* "." */
@ -345,66 +360,72 @@ struct lconv { /* Values in the "C" locale: */
char int_n_sign_posn; /* CHAR_MAX */
};
.EE
.IP
.PP
Contains members related to the formatting of numeric values.
In the "C" locale, its members have the values
shown in the comments above.
.IP
.PP
Conforming to: C11 and later; POSIX.1-2001 and later.
.IP
.PP
See also:
.BR setlocale (3),
.BR localeconv (3),
.BR charsets (5),
.BR locale (7)
.RE
.\"------------------------------------- ldiv_t -----------------------/
.TP
.I ldiv_t
.IP
.RS
.PP
Include:
.IR <stdlib.h> .
.IP
.PP
.EX
typedef struct {
long quot; /* Quotient */
long rem; /* Remainder */
} ldiv_t;
.EE
.IP
.PP
It is the type of the value returned by the
.BR ldiv (3)
function.
.IP
.PP
Conforming to: C99 and later; POSIX.1-2001 and later.
.IP
.PP
See also:
.BR ldiv (3)
.RE
.\"------------------------------------- lldiv_t ----------------------/
.TP
.I lldiv_t
.IP
.RS
.PP
Include:
.IR <stdlib.h> .
.IP
.PP
.EX
typedef struct {
long long quot; /* Quotient */
long long rem; /* Remainder */
} lldiv_t;
.EE
.IP
.PP
It is the type of the value returned by the
.BR lldiv (3)
function.
.IP
.PP
Conforming to: C99 and later; POSIX.1-2001 and later.
.IP
.PP
See also:
.BR lldiv (3)
.RE
.\"------------------------------------- pid_t ------------------------/
.TP
.I pid_t
.IP
.RS
.PP
Include
.IR <sys/types.h> ;
or
@ -431,7 +452,7 @@ or
.I <unistd.h>
or
.IR <utmpx.h> .
.IP
.PP
This type is used for storing process IDs, process group IDs, and session IDs.
According to POSIX, it shall be a signed integer type,
and the implementation shall support one or more programming environments
@ -439,9 +460,9 @@ where the width of
.I pid_t
is no greater than the width of the type
.IR long .
.IP
.PP
Conforming to: POSIX.1-2001 and later.
.IP
.PP
See also:
.BR fork (2),
.BR getpid (2),
@ -455,20 +476,22 @@ See also:
.BR waitpid (2),
.BR sigqueue (3),
.BR credentials (7),
.RE
.\"------------------------------------- ptrdiff_t --------------------/
.TP
.I ptrdiff_t
.IP
.RS
.PP
Include:
.IR <stddef.h> .
.IP
.PP
Used for a count of elements, and array indices.
It is the result of subtracting two pointers.
According to the C language standard, it shall be a signed integer type
capable of storing values in the range
.RB [ PTRDIFF_MIN ,
.BR PTRDIFF_MAX ].
.IP
.PP
The length modifier for
.I ptrdiff_t
for the
@ -484,21 +507,23 @@ or
for printing
.I ptrdiff_t
values.
.IP
.PP
Conforming to: C99 and later; POSIX.1-2001 and later.
.IP
.PP
See also the
.I size_t
and
.I ssize_t
types in this page.
.RE
.\"------------------------------------- regmatch_t -------------------/
.TP
.I regmatch_t
.IP
.RS
.PP
Include:
.IR <regex.h> .
.IP
.PP
.EX
typedef struct {
regoff_t rm_so; /* Byte offset from start of string
@ -508,36 +533,38 @@ typedef struct {
substring */
} regmatch_t;
.EE
.IP
.PP
This is a structure type used in regular expression matching.
.IP
.PP
Conforming to: POSIX.1-2001 and later.
.IP
.PP
See also:
.BR regexec (3)
.RE
.\"------------------------------------- regoff_t ---------------------/
.TP
.I regoff_t
.IP
.RS
.PP
Include:
.IR <regex.h> .
.IP
.PP
According to POSIX, it shall be a signed integer type
capable of storing the largest value that can be stored in either a
.I ptrdiff_t
type or a
.I ssize_t
type.
.IP
.PP
Conforming to: POSIX.1-2001 and later.
.IP
.PP
Notes: Prior to POSIX.1-2008, the type was capable of storing
the largest value that can be stored in either an
.I off_t
type or a
.I ssize_t
type.
.IP
.PP
See also the
.I regmatch_t
structure and the
@ -545,10 +572,12 @@ structure and the
and
.I ssize_t
types in this page.
.RE
.\"------------------------------------- sigevent ---------------------/
.TP
.I sigevent
.IP
.RS
.PP
Include:
.IR <signal.h> ;
or
@ -557,7 +586,7 @@ or
.I <mqueue.h>
or
.IR <time.h> .
.IP
.PP
.EX
struct sigevent {
int sigev_notify; /* Notification type */
@ -569,12 +598,12 @@ struct sigevent {
/* Notification attributes */
};
.EE
.IP
.PP
For further details about this type, see
.BR sigevent (7).
.IP
.PP
Conforming to: POSIX.1-2001 and later.
.IP
.PP
Notes:
.I <aio.h>
and
@ -582,25 +611,27 @@ and
define
.I sigevent
since POSIX.1-2008.
.IP
.PP
See also:
.BR timer_create (2),
.BR getaddrinfo_a (3),
.BR lio_listio (3),
.BR mq_notify (3)
.IP
.PP
See also the
.I aiocb
structure in this page.
.RE
.\"------------------------------------- siginfo_t --------------------/
.TP
.I siginfo_t
.IP
.RS
.PP
Include:
.IR <signal.h> ;
or
.IR <sys/wait.h> .
.IP
.PP
.EX
typedef struct {
int si_signo; /* Signal number */
@ -612,36 +643,38 @@ typedef struct {
union sigval si_value; /* Signal value */
} siginfo_t;
.EE
.IP
.PP
Information associated with a signal.
For further details on this structure
(including additional, Linux-specific fields), see
.BR sigaction (2).
.IP
.PP
Conforming to: POSIX.1-2001 and later.
.IP
.PP
See also:
.BR pidfd_send_signal (2),
.BR rt_sigqueueinfo (2),
.BR sigaction (2),
.BR sigwaitinfo (2),
.BR psiginfo (3)
.RE
.\"------------------------------------- sigset_t ---------------------/
.TP
.I sigset_t
.IP
.RS
.PP
Include:
.IR <signal.h> ;
or
.I <spawn.h>
or
.IR <sys/select.h> .
.IP
.PP
This is a type that represents a set of signals.
According to POSIX, this shall be an integer or structure type.
.IP
.PP
Conforming to: POSIX.1-2001 and later.
.IP
.PP
See also:
.BR epoll_pwait (2),
.BR ppoll (2),
@ -653,29 +686,31 @@ See also:
.BR sigsuspend (2),
.BR sigwaitinfo (2),
.BR signal (7)
.RE
.\"------------------------------------- sigval -----------------------/
.TP
.I sigval
.IP
.RS
.PP
Include:
.IR <signal.h> .
.IP
.PP
.EX
union sigval {
int sigval_int; /* Integer value */
void *sigval_ptr; /* Pointer value */
};
.EE
.IP
.PP
Data passed with a signal.
.IP
.PP
Conforming to: POSIX.1-2001 and later.
.IP
.PP
See also:
.BR pthread_sigqueue (3),
.BR sigqueue (3),
.BR sigevent (7)
.IP
.PP
See also the
.I sigevent
structure
@ -683,10 +718,12 @@ and the
.I siginfo_t
type
in this page.
.RE
.\"------------------------------------- size_t -----------------------/
.TP
.I size_t
.IP
.RS
.PP
Include:
.I <stddef.h>
or
@ -741,7 +778,7 @@ or
.I <wchar.h>
or
.IR <wordexp.h> .
.IP
.PP
Used for a count of bytes. It is the result of the
.I sizeof
operator.
@ -755,7 +792,7 @@ where the width of
.I size_t
is no greater than the width of the type
.IR long .
.IP
.PP
The length modifier for
.I size_t
for the
@ -771,9 +808,9 @@ or
for printing
.I size_t
values.
.IP
.PP
Conforming to: C99 and later; POSIX.1-2001 and later.
.IP
.PP
Notes:
.IR <aio.h> ,
.IR <glob.h> ,
@ -787,7 +824,7 @@ and
define
.I size_t
since POSIX.1-2008.
.IP
.PP
See also:
.BR read (2),
.BR write (2),
@ -798,16 +835,18 @@ See also:
.BR memcpy (3),
.BR memset (3),
.BR offsetof (3)
.IP
.PP
See also the
.I ptrdiff_t
and
.I ssize_t
types in this page.
.RE
.\"------------------------------------- ssize_t ----------------------/
.TP
.I ssize_t
.IP
.RS
.PP
Include:
.IR <sys/types.h> ;
or
@ -826,7 +865,7 @@ or
.I <sys/uio.h>
or
.IR <unistd.h> .
.IP
.PP
Used for a count of bytes or an error indication.
According to POSIX, it shall be a signed integer type
capable of storing values at least in the range [-1,
@ -836,7 +875,7 @@ where the width of
.I ssize_t
is no greater than the width of the type
.IR long .
.IP
.PP
Glibc and most other implementations provide a length modifier for
.I ssize_t
for the
@ -862,9 +901,9 @@ by converting the value to
.I intmax_t
and using its length modifier
.RB ( j ).
.IP
.PP
Conforming to: POSIX.1-2001 and later.
.IP
.PP
See also:
.BR read (2),
.BR readlink (2),
@ -872,23 +911,25 @@ See also:
.BR recv (2),
.BR send (2),
.BR write (2)
.IP
.PP
See also the
.I ptrdiff_t
and
.I size_t
types in this page.
.RE
.\"------------------------------------- suseconds_t ------------------/
.TP
.I suseconds_t
.IP
.RS
.PP
Include:
.IR <sys/types.h> ;
or
.I <sys/select.h>
or
.IR <sys/time.h> .
.IP
.PP
Used for time in microseconds.
According to POSIX, it shall be a signed integer type
capable of storing values at least in the range [-1, 1000000],
@ -897,16 +938,18 @@ where the width of
.I suseconds_t
is no greater than the width of the type
.IR long .
.IP
.PP
Conforming to: POSIX.1-2001 and later.
.IP
.PP
See also the
.I timeval
structure in this page.
.RE
.\"------------------------------------- time_t -----------------------/
.TP
.I time_t
.IP
.RS
.PP
Include:
.I <sys/types.h>
or
@ -927,48 +970,52 @@ or
.I <sys/time.h>
or
.IR <utime.h> .
.IP
.PP
Used for time in seconds.
According to POSIX, it shall be an integer type.
.IP
.PP
Conforming to: C99 and later; POSIX.1-2001 and later.
.IP
.PP
Notes:
.I <sched.h>
defines
.I time_t
since POSIX.1-2008.
.IP
.PP
See also:
.BR stime (2),
.BR time (2),
.BR ctime (3),
.BR difftime (3)
.RE
.\"------------------------------------- timer_t ----------------------/
.TP
.I timer_t
.IP
.RS
.PP
Include:
.IR <sys/types.h> ;
or
.IR <time.h> .
.IP
.PP
Used for timer ID returned by
.BR timer_create (2).
According to POSIX,
there are no defined comparison or assignment operators for this type.
.IP
.PP
Conforming to: POSIX.1-2001 and later.
.IP
.PP
See also:
.BR timer_create (2),
.BR timer_delete (2),
.BR timer_getoverrun (2),
.BR timer_settime (2)
.RE
.\"------------------------------------- timespec ---------------------/
.TP
.I timespec
.IP
.RS
.PP
Include:
.IR <time.h> ;
or
@ -983,28 +1030,30 @@ or
.I <sys/select.h>
or
.IR <sys/stat.h> .
.IP
.PP
.EX
struct timespec {
time_t tv_sec; /* Seconds */
long tv_nsec; /* Nanoseconds */
};
.EE
.IP
.PP
Describes times in seconds and nanoseconds.
.IP
.PP
Conforming to: C11 and later; POSIX.1-2001 and later.
.IP
.PP
See also:
.BR clock_gettime (2),
.BR clock_nanosleep (2),
.BR nanosleep (2),
.BR timerfd_gettime (2),
.BR timer_gettime (2)
.RE
.\"------------------------------------- timeval ----------------------/
.TP
.I timeval
.IP
.RS
.PP
Include:
.IR <sys/time.h> ;
or
@ -1013,18 +1062,18 @@ or
.I <sys/select.h>
or
.IR <utmpx.h> .
.IP
.PP
.EX
struct timeval {
time_t tv_sec; /* Seconds */
suseconds_t tv_usec; /* Microseconds */
};
.EE
.IP
.PP
Describes times in seconds and microseconds.
.IP
.PP
Conforming to: POSIX.1-2001 and later.
.IP
.PP
See also:
.BR gettimeofday (2),
.BR select (2),
@ -1032,10 +1081,12 @@ See also:
.BR adjtime (3),
.BR futimes (3),
.BR timeradd (3)
.RE
.\"------------------------------------- uid_t ----------------------/
.TP
.I uid_t
.IP
.RS
.PP
Include:
.IR <sys/types.h> ;
or
@ -1050,13 +1101,13 @@ or
.I <sys/stat.h>
or
.IR <unistd.h> .
.IP
.PP
A type used to hold user IDs.
According to POSIX,
this shall be an integer type.
.IP
.PP
Conforming to: POSIX.1-2001 and later.
.IP
.PP
See also:
.BR chown (2),
.BR getuid (2),
@ -1064,6 +1115,8 @@ See also:
.BR getresuid (2),
.BR getpwnam (2),
.BR credentials (7)
.RE
.\"--------------------------------------------------------------------/
.SH NOTES
The structures described in this manual page shall contain,
at least, the members shown in their definition, in no particular order.