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#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <cjson/cJSON.h>
#include "util.h"
int json_streaming_read(FILE *stream, cJSON **json)
{
int ret;
size_t n;
char *line = NULL;
ret = getline(&line, &n, stream);
if (ret < 0) {
if (errno != 0) {
print_err("%s", strerror(errno));
return -errno;
}
return -EOF;
}
*json = cJSON_Parse(line);
free(line);
if (cJSON_IsInvalid(*json)) {
print_err("%s", "Invalid JSON");
return -EPERM;
}
return 0;
}
int vpopen(FILE **stream, const char *file, char *const argv[])
{
int fd[2];
int ret;
ret = pipe(fd);
if (ret < 0) {
print_err("%s", strerror(errno));
return -errno;
}
ret = fork();
if (ret < 0) {
print_err("%s", strerror(errno));
close(fd[0]);
close(fd[1]);
return -errno;
} else if (ret > 0) {
close(fd[1]);
*stream = fdopen(fd[0], "r");
if (*stream == NULL) {
print_err("%s", strerror(errno));
return -errno;
}
return 0;
}
close(fd[0]);
ret = dup2(fd[1], STDOUT_FILENO);
if (ret < 0)
goto out_err;
execvp(file, argv);
out_err:
close(fd[1]);
print_err("%s", strerror(errno));
exit(EXIT_FAILURE);
}
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