mirror of
https://framagit.org/bortzmeyer/echoping
synced 2024-11-18 15:26:17 +00:00
130 lines
2.6 KiB
C
130 lines
2.6 KiB
C
#include "inet.h"
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/* Most of error-handling routines stolen from Stevens' books */
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/*
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* Recoverable error. Print a message, and return to caller.
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*
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* err_ret(str, arg1, arg2, ...)
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*
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* The string "str" must specify the conversion specification for any args.
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*/
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/* VARARGS1 */
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err_ret(va_alist)
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va_dcl
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{
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va_list args;
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char *fmt;
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va_start(args);
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fmt = va_arg(args, char *);
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vfprintf(stderr, fmt, args);
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va_end(args);
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my_perror();
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fflush(stdout);
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fflush(stderr);
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return;
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}
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/*
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* Fatal error. Print a message and terminate. Don't dump core and don't
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* print the system's errno value.
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*
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* err_quit(str, arg1, arg2, ...)
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*
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* The string "str" must specify the conversion specification for any args.
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*/
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/* VARARGS1 */
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err_quit(va_alist)
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va_dcl
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{
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va_list args;
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char *fmt;
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va_start(args);
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fmt = va_arg(args, char *);
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vfprintf(stderr, fmt, args);
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fputc('\n', stderr);
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va_end(args);
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exit(1);
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}
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/*
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* Fatal error related to a system call. Print a message and terminate.
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* Don't dump core, but do print the system's errno value and its associated
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* message.
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*
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* err_sys(str, arg1, arg2, ...)
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*
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* The string "str" must specify the conversion specification for any args.
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*/
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/* VARARGS1 */
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err_sys(va_alist)
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va_dcl
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{
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va_list args;
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char *fmt;
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va_start(args);
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fmt = va_arg(args, char *);
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vfprintf(stderr, fmt, args);
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va_end(args);
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my_perror();
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exit(1);
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}
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my_perror()
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{
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fprintf(stderr, " %s\n", sys_err_str());
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}
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usage()
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{
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fprintf(stderr, "Usage: %s [-v] [-t timeout] [-c] [-d] [-u] [-s size] [-n number] [-w delay] server-name\n", progname);
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exit(1);
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}
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extern int errno; /* Unix error number */
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extern int sys_nerr; /* # of error message strings in sys table */
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#ifdef __FreeBSD__
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#else
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extern char *sys_errlist[]; /* the system error message table */
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#endif
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/*
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* Return a string containing some additional operating-system dependent
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* information. Note that different versions of UNIX assign different
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* meanings to the same value of "errno" (compare errno's starting with 35
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* between System V and BSD, for example). This means that if an error
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* condition is being sent to another UNIX system, we must interpret the
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* errno value on the system that generated the error, and not just send the
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* decimal value of errno to the other system.
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*/
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char *
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sys_err_str()
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{
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static char msgstr[200];
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if (errno != 0) {
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if (errno > 0 && errno < sys_nerr)
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sprintf(msgstr, "(%s)", sys_errlist[errno]);
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else
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sprintf(msgstr, "(errno = %d)", errno);
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} else {
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msgstr[0] = '\0';
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}
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return (msgstr);
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}
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