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access bits + util.is executable #1982

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merged 2 commits into from
Nov 21, 2024
Merged

access bits + util.is executable #1982

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64e7400
ffi/posix: add missing defines for `access` use
benoit-pierre Nov 21, 2024
ded9f6c
ffi/util: implement `isExecutable`
benoit-pierre Nov 21, 2024
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3 changes: 3 additions & 0 deletions ffi-cdecl/posix_decl.c
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Original file line number Diff line number Diff line change
Expand Up @@ -160,6 +160,9 @@ cdecl_func(strcmp)
cdecl_func(strcasecmp)

cdecl_const(F_OK)
cdecl_const(R_OK)
cdecl_const(W_OK)
cdecl_const(W_OK)
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cdecl_func(access)

cdecl_type(FILE)
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3 changes: 3 additions & 0 deletions ffi/posix_h.lua
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Expand Up @@ -112,6 +112,9 @@ int strcoll(const char *, const char *) __attribute__((nothrow, leaf, pure));
int strcmp(const char *, const char *) __attribute__((pure, leaf, nothrow));
int strcasecmp(const char *, const char *) __attribute__((pure, leaf, nothrow));
static const int F_OK = 0;
static const int R_OK = 4;
static const int W_OK = 2;
static const int X_OK = 1;
int access(const char *, int) __attribute__((nothrow, leaf));
typedef struct _IO_FILE FILE;
typedef long long unsigned int dev_t;
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9 changes: 9 additions & 0 deletions ffi/util.lua
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Expand Up @@ -744,4 +744,13 @@ function util.template(str, ...)
return result
end

-- Check if `path` is an executable file.
function util.isExecutable(path)
local attributes, err = lfs.attributes(path)
if not attributes or err ~= nil then
return false, err
end
return attributes.mode == "file" and C.access(path, C.X_OK + C.R_OK) == 0
end

return util