fmtmsg.c raw

   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  }
  91