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diff -crb --new-file a/lib/error.h b/lib/error.h
*** a/lib/error.h 1969-12-31 19:00:00.000000000 -0500
--- b/lib/error.h 2021-01-21 04:38:25.000000000 -0500
***************
*** 0 ****
--- 1,27 ----
+ #ifndef _ERROR_H_
+ #define _ERROR_H_
+
+ #include <stdarg.h>
+ #include <stdio.h>
+ #include <stdlib.h>
+ #include <string.h>
+ #include <errno.h>
+
+ static unsigned int error_message_count = 0;
+
+ static inline void error(int status, int errnum, const char* format, ...)
+ {
+ va_list ap;
+ fprintf(stderr, "%s: ", program_invocation_name);
+ va_start(ap, format);
+ vfprintf(stderr, format, ap);
+ va_end(ap);
+ if (errnum)
+ fprintf(stderr, ": %s", strerror(errnum));
+ fprintf(stderr, "\n");
+ error_message_count++;
+ if (status)
+ exit(status);
+ }
+
+ #endif /* _ERROR_H_ */
diff -crb --new-file a/src/error.h b/src/error.h
*** a/src/error.h 1969-12-31 19:00:00.000000000 -0500
--- b/src/error.h 2021-01-21 04:38:29.000000000 -0500
***************
*** 0 ****
--- 1,27 ----
+ #ifndef _ERROR_H_
+ #define _ERROR_H_
+
+ #include <stdarg.h>
+ #include <stdio.h>
+ #include <stdlib.h>
+ #include <string.h>
+ #include <errno.h>
+
+ static unsigned int error_message_count = 0;
+
+ static inline void error(int status, int errnum, const char* format, ...)
+ {
+ va_list ap;
+ fprintf(stderr, "%s: ", program_invocation_name);
+ va_start(ap, format);
+ vfprintf(stderr, format, ap);
+ va_end(ap);
+ if (errnum)
+ fprintf(stderr, ": %s", strerror(errnum));
+ fprintf(stderr, "\n");
+ error_message_count++;
+ if (status)
+ exit(status);
+ }
+
+ #endif /* _ERROR_H_ */
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