apio
743aedcd49
exit() now calls registered handlers before calling _exit(). And initialize_libc() can now register a handler to close stdout and stderr on program termination!! :)
34 lines
723 B
C++
34 lines
723 B
C++
#include <errno.h>
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#include <fcntl.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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static void terminate_libc()
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{
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fclose(stdout);
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fclose(stderr);
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}
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extern "C" void initialize_libc()
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{
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if (lseek(0, 0, SEEK_CUR) < 0)
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{
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if (errno == EBADF) stdout = fopen("/dev/console", "rw");
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else
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exit(errno);
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if (!stdout) exit(errno);
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errno = 0;
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}
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else { stdout = fdopen(0, "rw"); }
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if (lseek(1, 0, SEEK_CUR) < 0)
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{
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if (errno == EBADF) stderr = fopen("/dev/console", "rw");
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else
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exit(errno);
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if (!stderr) exit(errno);
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errno = 0;
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}
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else { stderr = fdopen(1, "rw"); }
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atexit(terminate_libc);
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} |