Support POSIX/SUS ``programming environment'' mistake in confstr().
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parent
476d84ff75
commit
603a6e79d8
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svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=100149
@ -167,6 +167,21 @@ int fchown(int, uid_t, gid_t);
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int gethostname(char *, int /* socklen_t */);
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int setegid(gid_t);
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int seteuid(uid_t);
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/* X/Open mistake copied by POSIX */
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#define _CS_POSIX_V6_ILP32_OFF32_CFLAGS 2
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#define _CS_POSIX_V6_ILP32_OFF32_LDFLAGS 3
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#define _CS_POSIX_V6_ILP32_OFF32_LIBS 4
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#define _CS_POSIX_V6_ILP32_OFFBIG_CFLAGS 5
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#define _CS_POSIX_V6_ILP32_OFFBIG_LDFLAGS 6
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#define _CS_POSIX_V6_ILP32_OFFBIG_LIBS 7
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#define _CS_POSIX_V6_LP64_OFF64_CFLAGS 8
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#define _CS_POSIX_V6_LP64_OFF64_LDFLAGS 9
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#define _CS_POSIX_V6_LP64_OFF64_LIBS 10
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#define _CS_POSIX_V6_LPBIG_OFFBIG_CFLAGS 11
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#define _CS_POSIX_V6_LPBIG_OFFBIG_LDFLAGS 12
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#define _CS_POSIX_V6_LPBIG_OFFBIG_LIBS 13
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#define _CS_POSIX_V6_WIDTH_RESTRICTED_ENVS 14
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#endif
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/*
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@ -40,20 +40,81 @@ __FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <errno.h>
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#include <limits.h>
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#include <paths.h>
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#include <unistd.h>
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#include <string.h>
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#include <unistd.h>
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size_t
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confstr(int name, char *buf, size_t len)
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{
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const char *p;
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const char UPE[] = "unsupported programming environment";
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switch (name) {
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case _CS_PATH:
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p = _PATH_STDPATH;
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goto docopy;
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/*
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* POSIX/SUS ``Programming Environments'' stuff
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*
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* We don't support more than one programming environment
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* on any platform (yet), so we just return the empty
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* string for the environment we are compiled for,
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* and the string "unsupported programming environment"
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* for anything else. (The Standard says that if these
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* values are used on a system which does not support
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* this environment -- determined via sysconf() -- then
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* the value we return is unspecified. So, we return
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* something which will cause obvious breakage.)
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*
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* Note that the _V6_LP64_OFF64 is actually an *I*LP64
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* environment; FreeBSD's LP64 architectures use the
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* _V6_LPBIG_OFFBIG environment instead.
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*/
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case _CS_POSIX_V6_ILP32_OFF32_CFLAGS:
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case _CS_POSIX_V6_ILP32_OFF32_LDFLAGS:
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case _CS_POSIX_V6_ILP32_OFF32_LIBS:
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case _CS_POSIX_V6_LP64_OFF64_CFLAGS:
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case _CS_POSIX_V6_LP64_OFF64_LDFLAGS:
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case _CS_POSIX_V6_LP64_OFF64_LIBS:
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/*
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* These six environments are never supported.
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*/
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p = UPE;
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goto docopy;
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case _CS_POSIX_V6_ILP32_OFFBIG_CFLAGS:
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case _CS_POSIX_V6_ILP32_OFFBIG_LDFLAGS:
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case _CS_POSIX_V6_ILP32_OFFBIG_LIBS:
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if (sizeof(long) * CHAR_BIT == 32 &&
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sizeof(off_t) > sizeof(long))
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p = "";
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else
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p = UPE;
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goto docopy;
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case _CS_POSIX_V6_LPBIG_OFFBIG_CFLAGS:
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case _CS_POSIX_V6_LPBIG_OFFBIG_LDFLAGS:
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case _CS_POSIX_V6_LPBIG_OFFBIG_LIBS:
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if (sizeof(long) * CHAR_BIT >= 64 &&
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sizeof(void *) * CHAR_BIT >= 64 &&
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sizeof(int) * CHAR_BIT >= 32 &&
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sizeof(off_t) >= sizeof(long))
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p = "";
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else
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p = UPE;
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goto docopy;
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case _CS_POSIX_V6_WIDTH_RESTRICTED_ENVS:
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if (sizeof(long) * CHAR_BIT >= 64)
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p = "_V6_LPBIG_OFFBIG";
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else
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p = "_V6_ILP32_OFFBIG";
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goto docopy;
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docopy:
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if (len != 0 && buf != NULL)
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strlcpy(buf, p, len);
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