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/* SPDX-License-Identifier: ISC */
#include "runsvc.h"
struct entry {
struct entry *next;
char data[];
};
extern char **environ;
static void free_list(struct entry *list)
{
struct entry *e;
while (list != NULL) {
e = list;
list = list->next;
free(e);
}
}
static struct entry *parse_list(rdline_t *rd)
{
struct entry *e, *list = NULL;
char *ptr;
while (rdline(rd) == 0) {
ptr = rd->line;
while (*ptr != '\0' && *ptr != ' ' && *ptr != '=')
++ptr;
if (*ptr == ' ')
memmove(ptr, ptr + 1, strlen(ptr + 1) + 1);
if (*(ptr++) != '=') {
fprintf(stderr, "%s: %zu: line is not of the shape "
"'key = value', skipping\n",
rd->filename, rd->lineno);
continue;
}
if (*ptr == ' ')
memmove(ptr, ptr + 1, strlen(ptr + 1) + 1);
if (unescape(ptr)) {
fprintf(stderr, "%s: %zu: malformed string constant, "
"skipping\n",
rd->filename, rd->lineno);
continue;
}
e = calloc(1, sizeof(*e) + strlen(rd->line) + 1);
if (e == NULL)
goto fail_oom;
strcpy(e->data, rd->line);
e->next = list;
list = e;
}
return list;
fail_oom:
fputs("out of memory\n", stderr);
free_list(list);
return NULL;
}
static struct entry *list_from_file(void)
{
struct entry *list;
rdline_t rd;
if (rdline_init(&rd, AT_FDCWD, ENVFILE, 0, NULL))
return NULL;
list = parse_list(&rd);
rdline_cleanup(&rd);
return list;
}
int initenv(void)
{
struct entry *list, *e;
int i, count;
char **envp;
list = list_from_file();
if (list == NULL)
return -1;
for (count = 0, e = list; e != NULL; e = e->next)
++count;
envp = malloc((count + 1) * sizeof(char *));
if (envp == NULL) {
fputs("out of memory\n", stderr);
free_list(list);
return -1;
}
for (i = 0, e = list; e != NULL; e = e->next)
envp[i] = e->data;
envp[i] = NULL;
environ = envp;
return 0;
}
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