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/* See LICENSE file for copyright and license details. */
#include "util.h"
#if defined(HAVE_PRCTL)
# include <sys/prctl.h>
#endif
#include <sys/wait.h>
#include <ctype.h>
#include <errno.h>
#include <limits.h>
#include <signal.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <strings.h>
#include <unistd.h>
char *argv0;
void
weprintf(const char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
if (argv0 && strncmp(fmt, "usage", strlen("usage")))
fprintf(stderr, "%s: ", argv0);
vfprintf(stderr, fmt, ap);
if (fmt[0] && fmt[strlen(fmt)-1] == ':') {
fputc(' ', stderr);
perror(NULL);
}
va_end(ap);
}
int
tollu(const char *s, unsigned long long int min, unsigned long long int max, unsigned long long int *out)
{
char *end;
errno = 0;
if (*s == '-') {
errno = ERANGE;
return -1;
}
if (tolower(*s) == 'x' || *s == '#')
*out = strtoull(s + 1, &end, 16);
else if (*s == '0' && tolower(s[1]) == 'x')
*out = strtoull(s + 2, &end, 16);
else if (*s == '0' && tolower(s[1]) == 'o')
*out = strtoull(s + 2, &end, 8);
else if (*s == '0' && tolower(s[1]) == 'b')
*out = strtoull(s + 2, &end, 2);
else
*out = strtoull(s, &end, 10);
if (errno)
return -1;
if (*end) {
errno = EINVAL;
return -1;
}
if (*out < min || *out > max) {
errno = ERANGE;
return -1;
}
return 0;
}
int
tolli(const char *s, long long int min, long long int max, long long int *out)
{
int sign = 1;
unsigned long long int inter;
errno = 0;
if (*s == '-') {
s++;
sign = -1;
}
if (tollu(s, 0, ULLONG_MAX, &inter))
return -1;
if (sign > 0) {
if (max < 0 || inter > (unsigned long long int)max)
goto erange;
*out = (long long int)inter;
if (*out < min)
goto erange;
} else {
#if LLONG_MIN == -LLONG_MAX
if (inter > -LLONG_MIN)
goto erange;
#else
if (inter > (unsigned long long int)LLONG_MAX + 1ULL)
goto erange;
#endif
*out = -(long long int)inter;
if (*out < min || *out > max)
goto erange;
}
return 0;
erange:
errno = ERANGE;
return -1;
}
int
writeall(int fd, void *buf, size_t n)
{
char *buffer = buf;
size_t ptr = 0;
ssize_t r;
while (ptr < n) {
r = write(fd, buffer, n);
if (r < 0)
return -1;
buffer += (size_t)ptr;
n -= (size_t)ptr;
}
return 0;
}
static inline pid_t
enfork(int status)
{
pid_t pid = fork();
if (pid == -1)
enprintf(status, "fork:");
return pid;
}
int
enfork_jobs(int status, size_t *start, size_t *end, size_t jobs)
{
size_t j, s = *start, n = *end - *start;
if (jobs < 2)
return 1;
*end = n / jobs + s;
for (j = 1; j < jobs; j++) {
if (!enfork(status)) {
#if defined(HAVE_PRCTL) && defined(PR_SET_PDEATHSIG)
prctl(PR_SET_PDEATHSIG, SIGKILL);
#endif
*start = n * (j + 0) / jobs + s;
*end = n * (j + 1) / jobs + s;
return 0;
}
}
return 1;
}
void
enjoin_jobs(int status, int is_master)
{
int stat;
if (!is_master)
exit(0);
while (wait(&stat) != -1)
if (!stat)
exit(status);
if (errno != ECHILD)
enprintf(status, "wait:");
}
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