unix 环境高级编程勘误

最新推荐文章于 2025-11-15 09:44:57 发布

转载最新推荐文章于 2025-11-15 09:44:57 发布 · 540 阅读

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本文档详细记录了多个版本中已修正的错误，包括信号处理、多线程行为、函数原型定义等方面的问题，并指出了尚未解决的部分错误。

The following errors were fixed in the second printing.

Page 413, third paragraph. If a signal is related to an expiring timer, it
is sent to an arbitrary thread, not necessarily to the thread that scheduled the
timer. Hardware-related signals are usually delivered to the thread generating
the fault (FreeBSD 5.2.1 seems to depart from this is some cases, however). Look
here for some test programs that illustrate the
behavior of signals with multithreaded processes.
Page 67, sentence before Section 3.7. The size is 2GB, not 2TB.
Page 523, Figure 15.26. The largest message we can send on FreeBSD 5.2.1 is
2048 bytes. The kernel limits this value to the maximum size in bytes allowed on
a queue.
Page 367, Figure 11.6. pthread_cancel_push should
be pthread_cleanup_push.
Page 382, last sentence on page. pthread_mutex_destroy should be pthread_cond_destroy.
Page 357, function prototype for pthread_create.
The argument for the start routine is a void *, not a
void.
Page 158, near bottom of page. tempfile should be
tmpfile.
Page 853, solution to exercise 1.3. ptr should be
msg to make it consistent with the function prototype
for perror shown earlier in the book.

The following errors were fixed in the third printing.

Page 194, function prototypes for setenv and unsetenv. These functions return -1 on error, which is more
specific than simply a nonzero return value.
Page 306, Figure 10.4. The Corrigenda for the Single UNIX Specification
added abort and sockatmark
to the list of reentrant functions.
Page 361, middle of page. The discussion of pthread_join has been cleaned up, making it clear which
thread is placed in the detached state and that it is implementation-specific
whether this function fails.
Page 365, Example at end of page. "nonzero" should be "zero."
Page 367, middle of page. The behavior of implementations varies concerning
whether cleanup handlers are called if a thread returns from its start routine.
Page 367, end of page. pthread_join for a detached
thread might not fail in some implementations, so change "will" to "can."
Page 374, middle of page. fh[idx] = fp->f_next should be fh[idx] = fp. Actually, I should apologize for this one. I've written
this logic (correctly) so many times that I have no good excuse for getting it
wrong this time. Same problem occurs again near the top of page 377.
Page 374, end of page. In the statement idx = HASH(fp) at the beginning of
foo_find, fp is undefined at
this point. The correct thing to do is to search every hash chain to find a
matching ID. Same problem occurs again in the middle of page 377.
Page 391, function prototype for pthread_attr_setstack. Remove the const type qualifier.
Pages 414-415, Figure 12.16. Change the variable wait to waitloc to allow
compilation on some platforms.
Page 599, Figure 17.16. The variable len should be
declared to be of type socklen_t.
Pages 849 and 851 (Figures B.3 and B.4). The snprintf and vsnprintf calls
should specify one byte less than the size of the buffer to prevent overwriting
the byte after the end of the buffer with a newline.

Here are the errors not yet fixed in any printing:

Page 255, top of page. ac_flag should be ac_stat.
Page 14, first paragraph. The statement that all threads in a process share
the same stacks is a little misleading: each thread executes on its own stack,
although any thread can access the stack of the other threads in the process,
because the address space is shared among the threads.
Page 701, last paragraph. Figure 15.8 should be Figure 15.19.

注意：很多的和中文版的页码对不上的。现在看到十一章线程部分程序清单11-6和11-7中的foo_alloc(void)函数中的第十二行应该改为fh[index]=fp;这个对应着上面勘误中的15.以后还会继续更正，争取和中文版的对应起来

我又发现了新的问题，就是在中文版的apue中的11-7中的foo_alloc(void)中的/*...continue initialization**/之后应该是忘记加上pthread_mutex_unlock(&fp->f_lock);

个人感觉p363的程序14-4有些问题。我觉得在TELL_PARENT()，WAIT_PARENT(),TELL_CHILD(),WAIT_PARENT()这几个函数的顺序可能有些问题，感觉有可能在

锁定文件之前就造成死锁。。