23 lines
765 B
C
23 lines
765 B
C
#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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static const char from[] = "/var/lib/fprint/fw";
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static const char to[] = "@to@";
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FILE* fopen_wrapper(const char* fn, const char* mode) {
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size_t fn_len = strlen(fn);
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size_t from_len = strlen(from);
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if (fn_len > from_len && memcmp(fn, from, from_len) == 0) {
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size_t to_len = strlen(to);
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char* rewritten = calloc(fn_len + (to_len - from_len) + 1, 1);
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memcpy(rewritten, to, to_len);
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memcpy(rewritten + to_len, fn + from_len, fn_len - from_len);
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printf("fopen_wrapper.c: Replacing path '%s' with '%s'\n", fn, rewritten);
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FILE* result = fopen(rewritten, mode);
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free(rewritten);
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return result;
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}
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return fopen(fn, mode);
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}
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