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init/lib/libcfg/pack_argv.c

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/* SPDX-License-Identifier: ISC */
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <errno.h>
#include <stdio.h>
#include "libcfg.h"
int pack_argv(char *str)
{
char *dst, *start;
int count = 0;
dst = str;
for (;;) {
while (*str == ' ')
++str;
if (*str == '\0')
break;
if (*str == '"') {
start = dst;
*(dst++) = *(str++);
while (*str != '"') {
if (*str == '\0')
goto fail_str;
if (str[0] == '\\' && str[1] != '\0')
*(dst++) = *(str++);
*(dst++) = *(str++);
}
*(dst++) = *(str++);
if (*str != ' ' && *str != '\0')
goto fail_str;
if (*str == ' ')
++str;
*(dst++) = '\0';
if (unescape(start))
goto fail_str;
dst = start + strlen(start) + 1;
} else {
while (*str != '\0' && *str != ' ')
*(dst++) = *(str++);
if (*str == ' ') {
++str;
*(dst++) = '\0';
}
}
++count;
}
*dst = '\0';
return count;
fail_str:
errno = EINVAL;
return -1;
}