path: root/libexec_vsetenvf.c

/* See LICENSE file for copyright and license details. */
#include "common.h"
#ifndef TEST


#if defined(__GNUC__)
# pragma GCC diagnostic ignored "-Wformat-nonliteral"
#endif


int
libexec_vsetenvf(struct libexec_command *cmd, enum libexec_insert_mode how, const char *name, const char *value_fmt, va_list args)
{
	int len, ret;
	char *buf;
	va_list args2;
	if (!name || !value_fmt) {
		errno = EINVAL;
		return -1;
	}
	va_copy(args2, args);
	len = vsnprintf(NULL, 0, value_fmt, args2);
	va_end(args2);
	if (len < 0)
		return -1;
	buf = malloc((size_t)len + 1U);
	if (!buf)
		return -1;
	if (vsprintf(buf, value_fmt, args) != len)
		abort();
	ret = libexec_setenv(cmd, how, name, buf);
	free(buf);
	return ret;
}


#else
TESTED_ELSEWHERE /* libexec_setenvf.c */
#endif