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![michael@ozlabs.org](/assets/img/avatar_default.png)
We'd like to get the progname for help output, so add an accessor. Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Reviewed-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com> Reviewed-by: Andreas F=E4rber <afaerber@suse.de> Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
216 lines
4.4 KiB
C
216 lines
4.4 KiB
C
/*
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* Error reporting
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*
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* Copyright (C) 2010 Red Hat Inc.
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*
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* Authors:
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* Markus Armbruster <armbru@redhat.com>,
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*
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* This work is licensed under the terms of the GNU GPL, version 2 or later.
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* See the COPYING file in the top-level directory.
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*/
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#include <stdio.h>
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#include "monitor.h"
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/*
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* Print to current monitor if we have one, else to stderr.
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* TODO should return int, so callers can calculate width, but that
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* requires surgery to monitor_vprintf(). Left for another day.
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*/
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void error_vprintf(const char *fmt, va_list ap)
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{
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if (cur_mon) {
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monitor_vprintf(cur_mon, fmt, ap);
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} else {
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vfprintf(stderr, fmt, ap);
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}
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}
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/*
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* Print to current monitor if we have one, else to stderr.
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* TODO just like error_vprintf()
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*/
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void error_printf(const char *fmt, ...)
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{
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va_list ap;
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va_start(ap, fmt);
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error_vprintf(fmt, ap);
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va_end(ap);
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}
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void error_printf_unless_qmp(const char *fmt, ...)
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{
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va_list ap;
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if (!monitor_cur_is_qmp()) {
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va_start(ap, fmt);
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error_vprintf(fmt, ap);
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va_end(ap);
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}
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}
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static Location std_loc = {
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.kind = LOC_NONE
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};
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static Location *cur_loc = &std_loc;
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/*
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* Push location saved in LOC onto the location stack, return it.
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* The top of that stack is the current location.
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* Needs a matching loc_pop().
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*/
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Location *loc_push_restore(Location *loc)
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{
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assert(!loc->prev);
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loc->prev = cur_loc;
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cur_loc = loc;
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return loc;
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}
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/*
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* Initialize *LOC to "nowhere", push it onto the location stack.
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* The top of that stack is the current location.
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* Needs a matching loc_pop().
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* Return LOC.
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*/
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Location *loc_push_none(Location *loc)
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{
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loc->kind = LOC_NONE;
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loc->prev = NULL;
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return loc_push_restore(loc);
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}
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/*
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* Pop the location stack.
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* LOC must be the current location, i.e. the top of the stack.
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*/
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Location *loc_pop(Location *loc)
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{
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assert(cur_loc == loc && loc->prev);
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cur_loc = loc->prev;
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loc->prev = NULL;
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return loc;
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}
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/*
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* Save the current location in LOC, return LOC.
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*/
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Location *loc_save(Location *loc)
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{
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*loc = *cur_loc;
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loc->prev = NULL;
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return loc;
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}
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/*
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* Change the current location to the one saved in LOC.
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*/
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void loc_restore(Location *loc)
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{
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Location *prev = cur_loc->prev;
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assert(!loc->prev);
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*cur_loc = *loc;
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cur_loc->prev = prev;
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}
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/*
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* Change the current location to "nowhere in particular".
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*/
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void loc_set_none(void)
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{
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cur_loc->kind = LOC_NONE;
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}
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/*
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* Change the current location to argument ARGV[IDX..IDX+CNT-1].
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*/
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void loc_set_cmdline(char **argv, int idx, int cnt)
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{
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cur_loc->kind = LOC_CMDLINE;
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cur_loc->num = cnt;
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cur_loc->ptr = argv + idx;
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}
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/*
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* Change the current location to file FNAME, line LNO.
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*/
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void loc_set_file(const char *fname, int lno)
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{
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assert (fname || cur_loc->kind == LOC_FILE);
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cur_loc->kind = LOC_FILE;
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cur_loc->num = lno;
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if (fname) {
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cur_loc->ptr = fname;
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}
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}
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static const char *progname;
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/*
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* Set the program name for error_print_loc().
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*/
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void error_set_progname(const char *argv0)
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{
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const char *p = strrchr(argv0, '/');
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progname = p ? p + 1 : argv0;
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}
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const char *error_get_progname(void)
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{
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return progname;
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}
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/*
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* Print current location to current monitor if we have one, else to stderr.
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*/
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void error_print_loc(void)
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{
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const char *sep = "";
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int i;
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const char *const *argp;
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if (!cur_mon && progname) {
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fprintf(stderr, "%s:", progname);
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sep = " ";
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}
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switch (cur_loc->kind) {
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case LOC_CMDLINE:
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argp = cur_loc->ptr;
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for (i = 0; i < cur_loc->num; i++) {
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error_printf("%s%s", sep, argp[i]);
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sep = " ";
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}
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error_printf(": ");
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break;
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case LOC_FILE:
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error_printf("%s:", (const char *)cur_loc->ptr);
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if (cur_loc->num) {
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error_printf("%d:", cur_loc->num);
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}
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error_printf(" ");
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break;
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default:
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error_printf("%s", sep);
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}
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}
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/*
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* Print an error message to current monitor if we have one, else to stderr.
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* Format arguments like sprintf(). The result should not contain
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* newlines.
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* Prepend the current location and append a newline.
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* It's wrong to call this in a QMP monitor. Use qerror_report() there.
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*/
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void error_report(const char *fmt, ...)
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{
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va_list ap;
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error_print_loc();
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va_start(ap, fmt);
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error_vprintf(fmt, ap);
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va_end(ap);
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error_printf("\n");
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}
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