diff options
Diffstat (limited to 'posix/getconf.c')
| -rw-r--r-- | posix/getconf.c | 73 |
1 files changed, 60 insertions, 13 deletions
diff --git a/posix/getconf.c b/posix/getconf.c index 2f68003ff3..6175dfec26 100644 --- a/posix/getconf.c +++ b/posix/getconf.c @@ -917,12 +917,12 @@ static const struct conf vars[] = }; -static const char *specs[] = +static struct { const char *name; int num; } specs[] = { - "POSIX_V6_ILP32_OFF32", - "POSIX_V6_ILP32_OFFBIG", - "POSIX_V6_LP64_OFF64", - "POSIX_V6_LPBIG_OFFBIG" + { "POSIX_V6_ILP32_OFF32", _SC_V6_ILP32_OFF32 }, + { "POSIX_V6_ILP32_OFFBIG", _SC_V6_ILP32_OFFBIG }, + { "POSIX_V6_LP64_OFF64", _SC_V6_LP64_OFF64 }, + { "POSIX_V6_LPBIG_OFFBIG", _SC_V6_LPBIG_OFFBIG } }; static const int nspecs = sizeof (specs) / sizeof (specs[0]); @@ -963,11 +963,14 @@ warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n\ return 0; } + const char *getconf_dir = getenv ("GETCONF_DIR") ?: GETCONF_DIR; + size_t getconf_dirlen = strlen (getconf_dir); + + const char *spec = NULL; + char buf[sizeof "POSIX_V6_LPBIG_OFFBIG"]; + char *argv0 = argv[0]; if (argc > 1 && strncmp (argv[1], "-v", 2) == 0) { - const char *spec; - int i; - if (argv[1][2] == '\0') { if (argc < 3) @@ -983,18 +986,62 @@ warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n\ argv += 1; argc += 1; } + } + else + { + char default_name[getconf_dirlen + sizeof "/default"]; + memcpy (mempcpy (default_name, getconf_dir, getconf_dirlen), + "/default", sizeof "/default"); + int len = readlink (default_name, buf, sizeof buf - 1); + if (len > 0) + { + buf[len] = '\0'; + spec = buf; + } + } - /* Check for the specifications we know. This is simple in the - moment. */ + /* Check for the specifications we know. */ + if (spec != NULL) + { + int i; for (i = 0; i < nspecs; ++i) - if (strcmp (spec, specs[i]) == 0) + if (strcmp (spec, specs[i].name) == 0) break; if (i == nspecs) error (2, 0, _("unknown specification \"%s\""), spec); - /* And now we forget the specification. We don't do anything different - with or without it. */ + switch (specs[i].num) + { +#ifndef _POSIX_V6_ILP32_OFF32 + case _SC_V6_ILP32_OFF32: +#endif +#ifndef _POSIX_V6_ILP32_OFFBIG + case _SC_V6_ILP32_OFFBIG: +#endif +#ifndef _POSIX_V6_LP64_OFF64 + case _SC_V6_LP64_OFF64: +#endif +#ifndef _POSIX_V6_LPBIG_OFFBIG + case _SC_V6_LPBIG_OFFBIG: +#endif + { + const char *args[argc + 3]; + size_t spec_len = strlen (spec); + char getconf_name[getconf_dirlen + 2 + spec_len + 1]; + memcpy (mempcpy (mempcpy (getconf_name, getconf_dir, + getconf_dirlen), + "/_", 2), spec, spec_len + 1); + args[0] = argv0; + args[1] = "-v"; + args[2] = spec; + memcpy (&args[3], &argv[1], argc * sizeof (argv[1])); + execv (getconf_name, (char * const *) args); + error (4, errno, _("Couldn't execute %s"), getconf_name); + } + default: + break; + } } if (argc < 2 || argc > 3) |