Errata

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ftp> cd /work/nutshell/9781565921153
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%

The file is a gzip compressed tar archive; extract the files
from the archive by typing:

% gzcat examples.tar.gz | tar xvf -

System V systems require the following tar command instead:

% gzcat examples.tar.gz | tar xof -

If gzcat is not available on your system, use separate gunzip
and tar or shar commands.

% gunzip examples.tar.gz
% tar xvf examples.tar"

#include <stdio.h>

line added before "main":

extern int

and: changed "main()" to "main(void)"

return 0;

column changed from "do one_thing" to "do another_thing"

#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>

replaced blank line 4 with:

#include <sys/wait.h>

extern int

and: changed "main()" to "main(void)"

and: in line after "/*initialize shared...": changed "0" to "0660"; in
two lines that read "exit()", inserted a "0" between the parens; in
the two "waitpid" lines, added "&" before "status"; changed blank
next-to-last line to read:

return 0;

parens after "exit"; changed line 12 ("exit()") to read "return 0;"

#include <stdio.h>

line added before "main":

extern int

and: changed "main()" to "main(void)"

changed blank next-to-last line to read:

return 0;

also added a paragraph after the last one:

The formal prototype of a start routine is
(void*)routine(void*arg). In our code example, we are adding threads
to an existing program (a not atypical scenario) and using the (void
*) cast to quit the compiler. In later examples, we redeclare the
routine to the correct prototype where possible.

#include <stdio.h>

line added before "main(int argc...":

extern int

and changed blank next-to-last line to:

return 0;

extern int

and: changed "main()" to "main(void)"; changed line "routine_x()" to:

void routine_x(void)

#include <stdio.h>
#include <9781565921153.h>

line added before "main(int argc...":

extern int

At the top of the code example, internal_error is declared but not used.
static const int internal_error = -12;
should be:
static const int real_bad_error = -12;

return 0;

in example 1-9, changed "exit(-1)" to "exit(1)" (line -6)

1-9 on this page

extern int

return 0;

extern int

and added a line after "server_comm....":

return 0

extern int

and: changed "main()" to "main(void)"; tabbed line "mult(size, row..."
to be under "(column" in the line above; added next-to-last line:

return 0

extern int

and: changed "main()" to "main(void)

next-to-last para, line -2: added a space between "main" (in itals)
and "routine"

free(p);
to
free(work_orderp);

semicolon after "index" to a comma

of p.72 and top of p.73 changed from constant-width font to
constant-width italic font

"index" to a comma

changed last line to "return 0;" and aligned the r with the p in
"9781565921153" above

#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>
#include <string.h>

added to end of #includes:

#include <sys/wait.h>

added before "int shared...":

#ifndef _POSIX_THREAD_PROCESS_SHARED
#error "This platform does not support process shared mutex"
#endif

line added before "main()":

extern int

and: changed "main()" to "main(void); also, 5 lines below that
("shared_mem_id..."): changed "0" to "0660"

"inc_count" (in italics)

and Example 3-7, line 12: changed from

init i;
to
int i;

added line to beginning of 3-7:

#include <stdio.h>

line added before "main()":

extern int

and: changed "main()" to "main(void)"; 8 lines below that: moved the
"}" to align with "for" two lines above, and changed the blank line
after the close curly bracket to read:

return 0;

{
9781565921153_t threads[3];

added a new line

{
init i;
9781565921153_t threads[3];

and changed line 17 from

9781565921153_join(&thread[i], NULL);
to
9781565921153_join(thread[i], NULL);

Example 3-7 used to read:

"main(void)"
{
9781565921153_t threads[3];
...
9781565921153_join(&threads[i], NULL);"

It now reads:

"main(void)
{
int i;
9781565921153_t threads[3];
...
9781565921153_join(threads[i], NULL);"

Line 7 of example 3-9 on page 86 used to read:

"} 9781565921153_rdwr_t"

as the structure for a reader/writer mutex lock. The five function
signatures at the top of page 87 appear to use this correctly.
However, in the function definitions on page 88-89 in Examples 3-11,
3-12, and 3-13 accept as a first parameter a variable of type:

"9781565921153_rdwr_t_np"

which contradicts the aforementioned signatures.

Example 3-13 did read:

"int 9781565921153_rdwr_runlock_np(pthread_rdwr_t_np *rdwrp)"

Now reads:

"int 9781565921153_rdwr_runlock_np(pthread_rdwr_t *rdwrp)"

Example 3-11 used to read:

"int 9781565921153_rdwr_rlock_np(pthread_rdwr_t_np *rdwr)
...
9781565921153_cond_wait(?.)
..."

Now reads:

"int 9781565921153_rdwr_rlock_np(pthread_rdwr_t *rdwrp)
...
9781565921153_cond_wait(?.);
..."

Example 3-12 used to read:

"int 9781565921153_rdwr_wlock_np(pthread_rdwr_t_np *rdwrp)
...
9781565921153_cond_wait(?.)
..."

Now reads:

"int 9781565921153_rdwr_wlock_np(pthread_rdwr_t *rdwrp)
...
9781565921153_cond_wait(?.);
..."

rdwrp->wrinter_writing == 0
to
rdwrp->wrinter_writing = 0

Example 3-14 used to read:

"int 9781565921153_rdwr_wunlock_np(pthread_rdwr_t_np *rdwrp)
...
} else {
rdwrp->writer_writing == 0;
..."

It now reads:

"int 9781565921153_rdwr_wunlock_np(pthread_rdwr_t *rdwrp)
...
} else {
rdwrp->writer_writing = 0;
..."

3-18: changed line 3 to read:

extern int

and added a line before the final }:

return 0;

extern int

and added a line before the final }:

return 0;

bottom: changed "9781565921153_cond_signal" to "pthread_cond_broadcast"

return 0;

extern int

return 0;

worker_threadp = (9781565921153_t *)malloc(sizeof(pthread_t));

tpool_add_work(atm_thread_pool, process_request, (void *)workorderp);

The second bulleted item used to read:

"_POSIX_THREAD_ATTR_PRIORITY_SCHEDULING compile ..."

It now reads:

"_POSIX_THREAD_PRIORITY_SCHEDULING compile ..."

#ifdef _POSIX_THREAD_ATTR_STACKSIZE

3 lines below that: changed "If" to "if"; added a final line:

#endif

.
9781565921153_attr_init (&custom_attr);
.

(124 reprinted for pagebreak.)

changed line 3 of 4-11 to read:

int init_comm(void)

and line -4 to read:

void free_conn(int *connp)

#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>
#include <sys.types.h>
#include <9781565921153.h>

line added before "main()":

extern int

and: changed "main()" to "main(void)"

"i"; changed blank line -3 to "}" aligned above "printf"; added a line
below "printf...":

return 0;

"state" to "type"; 6th line from end of example: added "%d" before
"
"

"&custom_sched_attr"

extern int

and: changed "server main()" to "main(void)"

return 0;

high_prio = sched_get_priority_max(SCHED_FIFO);

The priority passed is an integer argument set up in the same manner
as a thread's priority value.

.
.
.
}

extern int

and: changed "main()" to "main(void)"

lines from "sigwait..." to "9781565921153_mutex_unlock..."; added a new
next-to-last line:

return NULL;

next-to-last line:

return (NULL);

and 17; in line 14, changed "[j+l]" to "[j]"

also, in the next-to-last text para., changed both instances of
"9781565921153_test_cancel" to "pthread_testcancel"

10

front on a line by itself, moved that back to align with the other
"*"s above. The same goes for "estring[20];" on p. 238; also, on 239,
in A-2: changed blank line 4 to:

extern int

return 0;

"Syntax: In draft 4 a constant 9781565921153_attr_default is defined
that can be used as the second argument in the 9781565921153_create
routine when you want the default attributes for a thread. In
the final standard the constant no longer exists and if you
want default attributes you pass NULL."