Josh Megnauth
9d2f5d95dc
The implementation for confstr is straightforward. Most of the constants return 1 on both musl and glibc. The only constant that doesn't is required for Fish. I also switched an #[unsafe(no_mangle)] from my last patch back to a #[no_mangle] because we need to bump cbindgen. #[unsafe(no_mangle)] is required for Rust 2024.
35 lines
880 B
C
35 lines
880 B
C
#include <assert.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#define CSPATHSZ 9
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#define BADSIZ 4
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int main(void) {
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char actual[CSPATHSZ] = {0};
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assert(confstr(_CS_PATH, actual, CSPATHSZ) == CSPATHSZ);
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const char expected[] = "/usr/bin";
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assert(strncmp(expected, actual, CSPATHSZ) == 0);
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// The constants other than _CS_PATH just return an empty str (no support).
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char empty[] = "";
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assert(
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confstr(
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_CS_POSIX_V6_LP64_OFF64_LIBS,
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empty,
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0
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) == 1
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);
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// Buffers that are too small should return the expected size.
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char small[BADSIZ] = {0};
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assert(confstr(_CS_PATH, small, BADSIZ) == CSPATHSZ);
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// Null buffer and zero length should return the expected size
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// for the constant.
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assert(confstr(_CS_PATH, NULL, 0) == CSPATHSZ);
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return EXIT_SUCCESS;
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}
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