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1 /* |
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2 |
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3 module: errlib.c |
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4 |
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5 purpose: library of error functions |
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6 |
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7 reference: Stevens, Unix network programming (2ed), p.922 |
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8 |
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9 */ |
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10 |
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11 #include "errlib.h" |
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12 |
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13 |
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14 #define MAXLINE 4095 |
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15 |
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16 #ifdef __CPLUSPLUS |
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17 extern "C" { |
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18 #endif |
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19 |
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20 int daemon_proc = 0; /* set to 0 if stdout/stderr available, else set to 1 */ |
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21 |
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22 static void err_doit (int errnoflag, int level, const char *fmt, va_list ap) |
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23 { |
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24 int errno_save = errno, n; |
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25 char buf[MAXLINE+1]; |
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26 |
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27 vsnprintf (buf, MAXLINE, fmt, ap); |
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28 n = strlen(buf); |
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29 if (errnoflag) |
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30 snprintf (buf+n, MAXLINE-n, ": %s", strerror(errno_save)); |
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31 strcat (buf, "\n"); |
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32 |
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33 if (daemon_proc) |
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34 syslog (level, buf); |
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35 else { |
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36 fflush (stdout); |
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37 fputs (buf, stderr); |
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38 fflush (stderr); |
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39 } |
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40 |
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41 return; |
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42 } |
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43 |
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44 void err_ret (const char *fmt, ...) |
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45 { |
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46 va_list ap; |
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47 |
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48 va_start (ap, fmt); |
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49 err_doit (1, LOG_INFO, fmt, ap); |
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50 va_end (ap); |
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51 return; |
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52 } |
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53 |
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54 void err_sys (const char *fmt, ...) |
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55 { |
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56 va_list ap; |
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57 |
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58 va_start (ap, fmt); |
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59 err_doit (1, LOG_ERR, fmt, ap); |
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60 va_end (ap); |
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61 exit (1); |
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62 } |
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63 |
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64 void err_msg (const char *fmt, ...) |
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65 { |
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66 va_list ap; |
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67 |
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68 va_start (ap, fmt); |
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69 err_doit (0, LOG_INFO, fmt, ap); |
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70 va_end (ap); |
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71 return; |
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72 } |
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73 |
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74 void err_quit (const char *fmt, ...) |
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75 { |
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76 va_list ap; |
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77 |
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78 va_start (ap, fmt); |
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79 err_doit (0, LOG_ERR, fmt, ap); |
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80 va_end (ap); |
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81 exit (1); |
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82 } |
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83 |
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84 void err_dump (const char *fmt, ...) |
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85 { |
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86 va_list ap; |
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87 |
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88 va_start (ap, fmt); |
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89 err_doit (1, LOG_ERR, fmt, ap); |
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90 va_end (ap); |
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91 abort(); |
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92 } |
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93 |
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94 #ifdef __CPLUSPLUS |
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95 } |
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96 #endif |