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mldr: Unexpand vchroot path for interpreters
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+26
src/startup/mldr/mldr.c
+26
src/startup/mldr/mldr.c
···
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#endif
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static void setup_stack32(const char* filepath, struct load_results* lr);
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// this is called when argv[0] specifies an interpreter and we need to "unexpand" it (i.e. convert it from a Linux path to a vchrooted path)
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static void vchroot_unexpand_interpreter(struct load_results* lr);
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// UUID of the main executable
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uint8_t exe_uuid[16];
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···
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mldr_load_results.argv[i] = mldr_load_results.argv[i + 1];
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}
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mldr_load_results.argv[mldr_load_results.argc] = NULL;
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if (p == NULL) {
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vchroot_unexpand_interpreter(&mldr_load_results);
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}
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if (mldr_load_results._32on64)
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setup_stack32(filename, &mldr_load_results);
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# error Unsupported platform!
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#endif
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};
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static void vchroot_unexpand_interpreter(struct load_results* lr) {
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static char unexpanded[4096];
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size_t length;
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if (lr->root_path) {
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length = strlen(lr->argv[0]);
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if (strncmp(lr->argv[0], lr->root_path, lr->root_path_length) == 0) {
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memmove(unexpanded, lr->argv[0] + lr->root_path_length, length - lr->root_path_length + 1);
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} else {
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// FIXME: potential buffer overflow
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memmove(unexpanded + sizeof(SYSTEM_ROOT) - 1, lr->argv[0], length + 1);
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memcpy(unexpanded, SYSTEM_ROOT, sizeof(SYSTEM_ROOT) - 1);
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}
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lr->argv[0] = unexpanded;
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}
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};