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tlog.c - ics2txt - convert icalendar .ics file to plain text |
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git clone git://bitreich.org/ics2txt git://enlrupgkhuxnvlhsf6lc3fziv5h2hhfrinws65d7roiv6bfj7d652fid.onion/ics2txt (git://bitreich.org) |
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README |
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--- |
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tlog.c (1353B) |
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--- |
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1 #include "log.h" |
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2 |
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3 #include <assert.h> |
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4 #include <string.h> |
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5 |
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6 /* |
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7 * log.c - log to standard error according to the log level |
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8 * |
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9 * Instead of logging to syslog, delegate logging to a separate |
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10 * tool, such as FreeBSD's daemon(8), POSIX's logger(1). |
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11 */ |
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12 |
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13 #include <errno.h> |
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14 #include <stdio.h> |
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15 #include <stdlib.h> |
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16 |
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17 #define LOG_DEFAULT 3 /* info */ |
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18 |
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19 int log_level = -1; |
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20 char *log_arg0 = NULL; |
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21 |
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22 void |
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23 vlogf(int level, char const *flag, char const *fmt, va_list va) |
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24 { |
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25 char *env; |
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26 int e = errno; |
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27 |
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28 if (log_level < 0) { |
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29 env = getenv("LOG"); |
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30 log_level = (env == NULL ? 0 : atoi(env)); |
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31 log_level = (log_level > 0 ? log_level : LOG_DEFAULT); |
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32 } |
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33 |
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34 if (log_level < level) |
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35 return; |
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36 |
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37 if (log_arg0 != NULL) |
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38 fprintf(stderr, "%s: ", log_arg0); |
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39 |
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40 fprintf(stderr, "%s: ", flag); |
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41 vfprintf(stderr, fmt, va); |
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42 |
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43 if (e != 0) |
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44 fprintf(stderr, ": %s", strerror(e)); |
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45 |
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46 fprintf(stderr, "\n"); |
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47 fflush(stderr); |
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48 } |
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49 |
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50 void |
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51 die(char const *fmt, ...) |
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52 { |
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53 va_list va; |
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54 |
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55 va_start(va, fmt); |
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56 vlogf(1, "error", fmt, va); |
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57 va_end(va); |
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58 exit(1); |
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59 } |
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60 |
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61 void |
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62 warn(char const *fmt, ...) |
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63 { |
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64 va_list va; |
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65 |
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66 va_start(va, fmt); |
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67 vlogf(2, "warn", fmt, va); |
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68 va_end(va); |
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69 } |
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70 |
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71 void |
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72 info(char const *fmt, ...) |
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73 { |
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74 va_list va; |
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75 |
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76 va_start(va, fmt); |
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77 vlogf(3, "info", fmt, va); |
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78 va_end(va); |
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79 } |
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80 |
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81 void |
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82 debug(char const *fmt, ...) |
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83 { |
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84 va_list va; |
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85 |
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86 va_start(va, fmt); |
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87 vlogf(4, "debug", fmt, va); |
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88 va_end(va); |
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89 } |
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