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implement fmtmsg function

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contributed by Isaac Dunham. this seems to be the last interface that
was missing for complete POSIX 2008 base + XSI coverage.
This commit is contained in:
Rich Felker 2014-06-21 19:24:15 -04:00
parent 3c42605a60
commit 5474a34669
2 changed files with 137 additions and 0 deletions
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47
include/fmtmsg.h Normal file
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#ifndef _FMTMSG_H
#define _FMTMSG_H
#ifdef __cplusplus
extern "C" {
#endif
#define MM_HARD 1
#define MM_SOFT 2
#define MM_FIRM 4
#define MM_APPL 8
#define MM_UTIL 16
#define MM_OPSYS 32
#define MM_RECOVER 64
#define MM_NRECOV 128
#define MM_PRINT 256
#define MM_CONSOLE 512
#define MM_NULLMC 0L
#define MM_HALT 1
#define MM_ERROR 2
#define MM_WARNING 3
#define MM_INFO 4
#define MM_NOSEV 0
#define MM_OK 0
#define MM_NOTOK (-1)
#define MM_NOMSG 1
#define MM_NOCON 4
#define MM_NULLLBL ((char*)0)
#define MM_NULLTXT ((char*)0)
#define MM_NULLACT ((char*)0)
#define MM_NULLTAG ((char*)0)
#define MM_NULLSEV 0
int fmtmsg(long, const char *, int, const char *, const char *, const char *);
#ifdef __cplusplus
}
#endif
#endif

90
src/misc/fmtmsg.c Normal file
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/* Public domain fmtmsg()
* Written by Isaac Dunham, 2014
*/
#include <fmtmsg.h>
#include <fcntl.h>
#include <unistd.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <pthread.h>
/*
* If lstr is the first part of bstr, check that the next char in bstr
* is either \0 or :
*/
static int _strcolcmp(const char *lstr, const char *bstr)
{
size_t i = 0;
while (lstr[i] && bstr[i] && (bstr[i] == lstr[i])) i++;
if ( lstr[i] || (bstr[i] && bstr[i] != ':')) return 1;
return 0;
}
int fmtmsg(long classification, const char *label, int severity,
const char *text, const char *action, const char *tag)
{
int ret = 0, i, consolefd, verb = 0;
char *errstring = MM_NULLSEV, *cmsg = getenv("MSGVERB");
char *const msgs[] = {
"label", "severity", "text", "action", "tag", NULL
};
int cs;
pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, &cs);
if (severity == MM_HALT) errstring = "HALT: ";
else if (severity == MM_ERROR) errstring = "ERROR: ";
else if (severity == MM_WARNING) errstring = "WARNING: ";
else if (severity == MM_INFO) errstring = "INFO: ";
if (classification & MM_CONSOLE) {
consolefd = open("/dev/console", O_WRONLY);
if (consolefd < 0) {
ret = MM_NOCON;
} else {
if (dprintf(consolefd, "%s%s%s%s%s%s%s%s\n",
label?label:"", label?": ":"",
severity?errstring:"", text?text:"",
action?"\nTO FIX: ":"",
action?action:"", action?" ":"",
tag?tag:"" )<1)
ret = MM_NOCON;
close(consolefd);
}
}
if (classification & MM_PRINT) {
while (cmsg && cmsg[0]) {
for(i=0; msgs[i]; i++) {
if (!_strcolcmp(msgs[i], cmsg)) break;
}
if (msgs[i] == NULL) {
//ignore MSGVERB-unrecognized component
verb = 0xFF;
break;
} else {
verb |= (1 << i);
cmsg = strchr(cmsg, ':');
if (cmsg) cmsg++;
}
}
if (!verb) verb = 0xFF;
if (dprintf(2, "%s%s%s%s%s%s%s%s\n",
(verb&1 && label) ? label : "",
(verb&1 && label) ? ": " : "",
(verb&2 && severity) ? errstring : "",
(verb&4 && text) ? text : "",
(verb&8 && action) ? "\nTO FIX: " : "",
(verb&8 && action) ? action : "",
(verb&8 && action) ? " " : "",
(verb&16 && tag) ? tag : "" ) < 1)
ret |= MM_NOMSG;
}
if ((ret & (MM_NOCON|MM_NOMSG)) == (MM_NOCON|MM_NOMSG))
ret = MM_NOTOK;
pthread_setcancelstate(cs, 0);
return ret;
}