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30 lines
620 B
C
30 lines
620 B
C
# include <stdio.h>
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# include <stdarg.h>
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# include <stdlib.h>
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# include <string.h>
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static void error_at_line(int status, int errnum, const char *filename,
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unsigned int linenum, const char *format, ...)
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{
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va_list ap;
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fflush(stdout);
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if (filename != NULL)
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fprintf(stderr, "%s:%u: ", filename, linenum);
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va_start(ap, format);
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vfprintf(stderr, format, ap);
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va_end(ap);
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if (errnum != 0)
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fprintf(stderr, ": %s", strerror(errnum));
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fprintf(stderr, "\n");
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if (status != 0)
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exit(status);
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}
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#define error(status, errnum, format...) \
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error_at_line(status, errnum, NULL, 0, format)
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