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tlog.c - iomenu - interactive terminal-based selection menu |
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git clone git://bitreich.org/iomenu git://hg6vgqziawt5s4dj.onion/iomenu (git://bitreich.org) |
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README |
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LICENSE |
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--- |
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tlog.c (1217B) |
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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 <errno.h> |
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5 #include <stdio.h> |
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6 #include <stdlib.h> |
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7 #include <string.h> |
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8 |
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9 #ifndef LOG_DEFAULT |
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10 #define LOG_DEFAULT 3 /* info */ |
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11 #endif |
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12 |
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13 char *arg0 = NULL; |
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14 static int log_level = -1; |
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15 |
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16 void |
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17 log_vprintf(int level, char const *flag, char const *fmt, va_list va) |
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18 { |
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19 char *env; |
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20 int old_errno = errno; |
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21 |
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22 if (log_level < 0) { |
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23 env = getenv("LOG"); |
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24 log_level = (env == NULL) ? 0 : atoi(env); |
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25 if (log_level == 0) |
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26 log_level = LOG_DEFAULT; |
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27 } |
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28 |
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29 if (log_level < level) |
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30 return; |
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31 |
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32 if (arg0 != NULL) |
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33 fprintf(stderr, "%s: ", arg0); |
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34 |
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35 fprintf(stderr, "%s: ", flag); |
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36 vfprintf(stderr, fmt, va); |
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37 |
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38 if (old_errno != 0) |
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39 fprintf(stderr, ": %s", strerror(old_errno)); |
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40 |
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41 fprintf(stderr, "\n"); |
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42 fflush(stderr); |
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43 } |
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44 |
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45 void |
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46 die(char const *fmt, ...) |
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47 { |
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48 va_list va; |
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49 va_start(va, fmt); log_vprintf(1, "error", fmt, va); va_end(va); |
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50 exit(1); |
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51 } |
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52 |
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53 void |
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54 warn(char const *fmt, ...) |
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55 { |
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56 va_list va; |
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57 va_start(va, fmt); log_vprintf(2, "warn", fmt, va); va_end(va); |
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58 } |
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59 |
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60 void |
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61 info(char const *fmt, ...) |
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62 { |
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63 va_list va; |
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64 va_start(va, fmt); log_vprintf(3, "info", fmt, va); va_end(va); |
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65 } |
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66 |
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67 void |
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68 debug(char const *fmt, ...) |
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69 { |
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70 va_list va; |
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71 va_start(va, fmt); log_vprintf(4, "debug", fmt, va); va_end(va); |
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72 } |
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