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/*
* Utility routines.
*
* Licensed under GPLv2, see file COPYING in this tarball for details.
*/
#include "abrtlib.h"
#include <syslog.h>
int xfunc_error_retval = EXIT_FAILURE;
int g_verbose;
int logmode = LOGMODE_STDIO;
const char *msg_prefix = "";
const char *msg_eol = "\n";
void (*g_custom_logger)(const char*);
void xfunc_die(void)
{
exit(xfunc_error_retval);
}
static void verror_msg_helper(const char *s, va_list p, const char* strerr, int flags)
{
char *msg;
int prefix_len, strerr_len, msgeol_len, used;
if (!logmode)
return;
used = vasprintf(&msg, s, p);
if (used < 0)
return;
/* This is ugly and costs +60 bytes compared to multiple
* fprintf's, but is guaranteed to do a single write.
* This is needed for e.g. when multiple children
* can produce log messages simultaneously. */
prefix_len = strlen(msg_prefix);
strerr_len = strerr ? strlen(strerr) : 0;
msgeol_len = strlen(msg_eol);
/* +3 is for ": " before strerr and for terminating NUL */
msg = (char*) xrealloc(msg, prefix_len + used + strerr_len + msgeol_len + 3);
/* TODO: maybe use writev instead of memmoving? Need full_writev? */
if (prefix_len) {
memmove(msg + prefix_len, msg, used);
used += prefix_len;
memcpy(msg, msg_prefix, prefix_len);
}
if (strerr) {
if (s[0]) {
msg[used++] = ':';
msg[used++] = ' ';
}
strcpy(&msg[used], strerr);
used += strerr_len;
}
strcpy(&msg[used], msg_eol);
if (flags & LOGMODE_STDIO) {
fflush(stdout);
full_write(STDERR_FILENO, msg, used + msgeol_len);
}
msg[used] = '\0'; /* remove msg_eol (usually "\n") */
if (flags & LOGMODE_SYSLOG) {
syslog(LOG_ERR, "%s", msg + prefix_len);
}
if ((flags & LOGMODE_CUSTOM) && g_custom_logger) {
g_custom_logger(msg + prefix_len);
}
free(msg);
}
void log_msg(const char *s, ...)
{
va_list p;
va_start(p, s);
verror_msg_helper(s, p, NULL, logmode);
va_end(p);
}
void error_msg(const char *s, ...)
{
va_list p;
va_start(p, s);
verror_msg_helper(s, p, NULL, (logmode | LOGMODE_CUSTOM));
va_end(p);
}
void error_msg_and_die(const char *s, ...)
{
va_list p;
va_start(p, s);
verror_msg_helper(s, p, NULL, (logmode | LOGMODE_CUSTOM));
va_end(p);
xfunc_die();
}
void perror_msg_and_die(const char *s, ...)
{
va_list p;
va_start(p, s);
/* Guard against "<error message>: Success" */
verror_msg_helper(s, p, errno ? strerror(errno) : NULL, (logmode | LOGMODE_CUSTOM));
va_end(p);
xfunc_die();
}
void perror_msg(const char *s, ...)
{
va_list p;
va_start(p, s);
/* Guard against "<error message>: Success" */
verror_msg_helper(s, p, errno ? strerror(errno) : NULL, (logmode | LOGMODE_CUSTOM));
va_end(p);
}
void die_out_of_memory(void)
{
error_msg_and_die("Out of memory, exiting");
}
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