33 lines
796 B
C++
33 lines
796 B
C++
#include "master.hpp"
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namespace factor {
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const char* vm_executable_path() {
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ssize_t bufsiz = 4096;
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/* readlink is called in a loop with increasing buffer sizes in case
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someone tries to run Factor from a incredibly deeply nested
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path. */
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while (true) {
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char* buf = new char[bufsiz + 1];
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ssize_t size= readlink("/proc/self/exe", buf, bufsiz);
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if (size < 0) {
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fatal_error("Cannot read /proc/self/exe", errno);
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} else {
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if (size < bufsiz) {
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/* Buffer was large enough, return string. */
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buf[size] = '\0';
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const char* ret = safe_strdup(buf);
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delete[] buf;
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return ret;
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} else {
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/* Buffer wasn't big enough, double it and try again. */
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delete[] buf;
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bufsiz *= 2;
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}
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}
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}
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}
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}
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