422cadfd5f
Within the components, snprintf() was unchecked and had inefficient calls in some places. We implement esnprintf() that does all the dirty laundry for us and use it exclusively now.
122 lines
1.8 KiB
C
122 lines
1.8 KiB
C
/* See LICENSE file for copyright and license details. */
|
|
#include <errno.h>
|
|
#include <stdarg.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
|
|
#include "util.h"
|
|
|
|
char *argv0;
|
|
|
|
static void
|
|
verr(const char *fmt, va_list ap)
|
|
{
|
|
if (argv0 && strncmp(fmt, "usage", sizeof("usage") - 1)) {
|
|
fprintf(stderr, "%s: ", argv0);
|
|
}
|
|
|
|
vfprintf(stderr, fmt, ap);
|
|
|
|
if (fmt[0] && fmt[strlen(fmt) - 1] == ':') {
|
|
fputc(' ', stderr);
|
|
perror(NULL);
|
|
} else {
|
|
fputc('\n', stderr);
|
|
}
|
|
}
|
|
|
|
void
|
|
warn(const char *fmt, ...)
|
|
{
|
|
va_list ap;
|
|
|
|
va_start(ap, fmt);
|
|
verr(fmt, ap);
|
|
va_end(ap);
|
|
}
|
|
|
|
void
|
|
die(const char *fmt, ...)
|
|
{
|
|
va_list ap;
|
|
|
|
va_start(ap, fmt);
|
|
verr(fmt, ap);
|
|
va_end(ap);
|
|
|
|
exit(1);
|
|
}
|
|
|
|
int
|
|
esnprintf(char *str, size_t size, const char *fmt, ...)
|
|
{
|
|
va_list ap;
|
|
int ret;
|
|
|
|
va_start(ap, fmt);
|
|
ret = vsnprintf(str, size, fmt, ap);
|
|
va_end(ap);
|
|
|
|
if (ret < 0) {
|
|
warn("snprintf:");
|
|
return -1;
|
|
} else if ((size_t)ret >= size) {
|
|
warn("snprintf: Output truncated");
|
|
return -1;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
const char *
|
|
bprintf(const char *fmt, ...)
|
|
{
|
|
va_list ap;
|
|
int ret;
|
|
|
|
va_start(ap, fmt);
|
|
if ((ret = vsnprintf(buf, sizeof(buf), fmt, ap)) < 0) {
|
|
warn("vsnprintf:");
|
|
} else if ((size_t)ret >= sizeof(buf)) {
|
|
warn("vsnprintf: Output truncated");
|
|
}
|
|
va_end(ap);
|
|
|
|
return buf;
|
|
}
|
|
|
|
const char *
|
|
fmt_scaled(size_t bytes)
|
|
{
|
|
unsigned int i;
|
|
float scaled;
|
|
const char *units[] = { "B", "KiB", "MiB", "GiB", "TiB", "PiB", "EiB",
|
|
"ZiB", "YiB" };
|
|
|
|
scaled = bytes;
|
|
for (i = 0; i < LEN(units) && scaled >= 1024; i++) {
|
|
scaled /= 1024.0;
|
|
}
|
|
|
|
return bprintf("%.1f%s", scaled, units[i]);
|
|
}
|
|
|
|
int
|
|
pscanf(const char *path, const char *fmt, ...)
|
|
{
|
|
FILE *fp;
|
|
va_list ap;
|
|
int n;
|
|
|
|
if (!(fp = fopen(path, "r"))) {
|
|
warn("fopen '%s':", path);
|
|
return -1;
|
|
}
|
|
va_start(ap, fmt);
|
|
n = vfscanf(fp, fmt, ap);
|
|
va_end(ap);
|
|
fclose(fp);
|
|
|
|
return (n == EOF) ? -1 : n;
|
|
}
|