nsz Git - musl/blob - src/misc/fmtmsg.c

   1 /* Public domain fmtmsg()
   2  * Written by Isaac Dunham, 2014
   3  */
   4 #include <fmtmsg.h>
   5 #include <fcntl.h>
   6 #include <unistd.h>
   7 #include <stdio.h>
   8 #include <string.h>
   9 #include <stdlib.h>
  10 #include <pthread.h>
  11
  12 /*
  13  * If lstr is the first part of bstr, check that the next char in bstr
  14  * is either \0 or :
  15  */
  16 static int _strcolcmp(const char *lstr, const char *bstr)
  17 {
  18         size_t i = 0;
  19         while (lstr[i] && bstr[i] && (bstr[i] == lstr[i])) i++;
  20         if ( lstr[i] || (bstr[i] && bstr[i] != ':')) return 1;
  21         return 0;
  22 }
  23
  24 int fmtmsg(long classification, const char *label, int severity,
  25            const char *text, const char *action, const char *tag)
  26 {
  27         int ret = 0, i, consolefd, verb = 0;
  28         char *errstring = MM_NULLSEV, *cmsg = getenv("MSGVERB");
  29         char *const msgs[] = {
  30                 "label", "severity", "text", "action", "tag", NULL
  31         };
  32         int cs;
  33
  34         pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, &cs);
  35
  36         if (severity == MM_HALT) errstring = "HALT: ";
  37         else if (severity == MM_ERROR) errstring = "ERROR: ";
  38         else if (severity == MM_WARNING) errstring = "WARNING: ";
  39         else if (severity == MM_INFO) errstring = "INFO: ";
  40
  41         if (classification & MM_CONSOLE) {
  42                 consolefd = open("/dev/console", O_WRONLY);
  43                 if (consolefd < 0) {
  44                         ret = MM_NOCON;
  45                 } else {
  46                         if (dprintf(consolefd, "%s%s%s%s%s%s%s%s\n",
  47                                     label?label:"", label?": ":"",
  48                                     severity?errstring:"", text?text:"",
  49                                     action?"\nTO FIX: ":"",
  50                                     action?action:"", action?" ":"",
  51                                     tag?tag:"" )<1)
  52                                 ret = MM_NOCON;
  53                         close(consolefd);
  54                 }
  55         }
  56
  57         if (classification & MM_PRINT) {
  58                 while (cmsg && cmsg[0]) {
  59                         for(i=0; msgs[i]; i++) {
  60                                 if (!_strcolcmp(msgs[i], cmsg)) break;
  61                         }
  62                         if (msgs[i] == NULL) {
  63                                 //ignore MSGVERB-unrecognized component
  64                                 verb = 0xFF;
  65                                 break;
  66                         } else {
  67                                 verb |= (1 << i);
  68                                 cmsg = strchr(cmsg, ':');
  69                                 if (cmsg) cmsg++;
  70                         }
  71                 }
  72                 if (!verb) verb = 0xFF;
  73                 if (dprintf(2, "%s%s%s%s%s%s%s%s\n",
  74                             (verb&1 && label) ? label : "",
  75                             (verb&1 && label) ? ": " : "",
  76                             (verb&2 && severity) ? errstring : "",
  77                             (verb&4 && text) ? text : "",
  78                             (verb&8 && action) ? "\nTO FIX: " : "",
  79                             (verb&8 && action) ? action : "",
  80                             (verb&8 && action) ? " " : "",
  81                             (verb&16 && tag) ? tag : "" ) < 1)
  82                         ret |= MM_NOMSG;
  83         }
  84         if ((ret & (MM_NOCON|MM_NOMSG)) == (MM_NOCON|MM_NOMSG))
  85                 ret = MM_NOTOK;
  86
  87         pthread_setcancelstate(cs, 0);
  88
  89         return ret;
  90 }