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Clean up messy API for src/port/thread.c.

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The point of this patch is to reduce inclusion spam by not needing
to #include <netdb.h> or <pwd.h> in port.h (which is read by every
compile in our tree).  To do that, we must remove port.h's
declarations of pqGetpwuid and pqGethostbyname.

pqGethostbyname is only used, and is only ever likely to be used,
in src/port/getaddrinfo.c --- which isn't even built on most
platforms, making pqGethostbyname dead code for most people.
Hence, deal with that by just moving it into getaddrinfo.c.

To clean up pqGetpwuid, invent a couple of simple wrapper
functions with less-messy APIs.  This allows removing some
duplicate error-handling code, too.

In passing, remove thread.c from the MSVC build, since it
contains nothing we use on Windows.

Noted while working on 376ce3e40.

Discussion: https://postgr.es/m/1634252654444.90107@mit.edu
This commit is contained in:
Tom Lane
2022-01-11 13:46:12 -05:00
parent 7fa945b857
commit 98e93a1fc9
11 changed files with 160 additions and 112 deletions
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11
src/port/path.c
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@@ -815,16 +815,7 @@ get_home_path(char *ret_path)
home = getenv("HOME");
if (home == NULL || home[0] == '\0')
{
char pwdbuf[BUFSIZ];
struct passwd pwdstr;
struct passwd *pwd = NULL;
(void) pqGetpwuid(geteuid(), &pwdstr, pwdbuf, sizeof(pwdbuf), &pwd);
if (pwd == NULL)
return false;
home = pwd->pw_dir;
}
return pg_get_user_home_dir(geteuid(), ret_path, MAXPGPATH);
strlcpy(ret_path, home, MAXPGPATH);
return true;
#else