Rich Felker
5ce3737931
libc.h was intended to be a header for access to global libc state and related interfaces, but ended up included all over the place because it was the way to get the weak_alias macro. most of the inclusions removed here are places where weak_alias was needed. a few were recently introduced for hidden. some go all the way back to when libc.h defined CANCELPT_BEGIN and _END, and all (wrongly implemented) cancellation points had to include it. remaining spurious users are mostly callers of the LOCK/UNLOCK macros and files that use the LFS64 macro to define the awful *64 aliases. in a few places, new inclusion of libc.h is added because several internal headers no longer implicitly include libc.h. declarations for __lockfile and __unlockfile are moved from libc.h to stdio_impl.h so that the latter does not need libc.h. putting them in libc.h made no sense at all, since the macros in stdio_impl.h are needed to use them correctly anyway.
14 lines
288 B
C
14 lines
288 B
C
#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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char *getenv(const char *name)
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{
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size_t l = __strchrnul(name, '=') - name;
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if (l && !name[l] && __environ)
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for (char **e = __environ; *e; e++)
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if (!strncmp(name, *e, l) && l[*e] == '=')
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return *e + l+1;
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return 0;
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}
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