77 lines
1.3 KiB
C
77 lines
1.3 KiB
C
#include <errno.h>
|
|
#include <stdarg.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
|
|
#include "warnp.h"
|
|
|
|
static int initialized = 0;
|
|
static char * name = NULL;
|
|
|
|
/* Free the name string. */
|
|
static void
|
|
done(void)
|
|
{
|
|
|
|
free(name);
|
|
name = NULL;
|
|
}
|
|
|
|
/**
|
|
* warnp_setprogname(progname):
|
|
* Set the program name to be used by warn() and warnx() to ${progname}.
|
|
*/
|
|
void
|
|
warnp_setprogname(const char * progname)
|
|
{
|
|
const char * p;
|
|
|
|
/* Free the name if we already have one. */
|
|
free(name);
|
|
|
|
/* Find the last segment of the program name. */
|
|
for (p = progname; progname[0] != '\0'; progname++)
|
|
if (progname[0] == '/')
|
|
p = progname + 1;
|
|
|
|
/* Copy the name string. */
|
|
name = strdup(p);
|
|
|
|
/* If we haven't already done so, register our exit handler. */
|
|
if (initialized == 0) {
|
|
atexit(done);
|
|
initialized = 1;
|
|
}
|
|
}
|
|
|
|
void
|
|
warn(const char * fmt, ...)
|
|
{
|
|
va_list ap;
|
|
|
|
va_start(ap, fmt);
|
|
fprintf(stderr, "%s", (name != NULL) ? name : "(unknown)");
|
|
if (fmt != NULL) {
|
|
fprintf(stderr, ": ");
|
|
vfprintf(stderr, fmt, ap);
|
|
}
|
|
fprintf(stderr, ": %s\n", strerror(errno));
|
|
va_end(ap);
|
|
}
|
|
|
|
void
|
|
warnx(const char * fmt, ...)
|
|
{
|
|
va_list ap;
|
|
|
|
va_start(ap, fmt);
|
|
fprintf(stderr, "%s", (name != NULL) ? name : "(unknown)");
|
|
if (fmt != NULL) {
|
|
fprintf(stderr, ": ");
|
|
vfprintf(stderr, fmt, ap);
|
|
}
|
|
fprintf(stderr, "\n");
|
|
va_end(ap);
|
|
}
|