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sway/config.c: use memcpy()
for known buffer size
`gcc-14` added a new warning around dangerous use of `strncpy()` withi
known overflow:
../sway/config.c: In function 'do_var_replacement':
../sway/config.c:983:33: error: '__builtin___strncpy_chk' specified bound depends on the length of the source argument [-Werror=stringop-truncation]
983 | strncpy(newptr, var->value, vvlen);
| ^
../sway/config.c:971:45: note: length computed here
971 | int vvlen = strlen(var->value);
| ^~~~~~~~~~~~~~~~~~
It's a bit fishy to rely on truncating behaviour of `strncpy()`. The
change uses `memcpy()` as more explicit way to express copy of `vvlen`
bytes.
(cherry picked from commit 2cd73a33c2
)
This commit is contained in:
parent
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commit
4683b53817
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@ -975,7 +975,7 @@ char *do_var_replacement(char *str) {
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int offset = find - str;
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strncpy(newptr, str, offset);
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newptr += offset;
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strncpy(newptr, var->value, vvlen);
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memcpy(newptr, var->value, vvlen);
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newptr += vvlen;
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strcpy(newptr, find + vnlen);
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free(str);
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