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#include <ctype.h>
#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/stat.h>
#include <sys/wait.h>
#include <unistd.h>
#include <cjson/cJSON.h>
#include "evanix.h"
#include "util.h"
int json_streaming_read(FILE *stream, cJSON **json)
{
size_t n;
int ret;
char *line = NULL;
errno = 0;
ret = getline(&line, &n, stream);
if (ret < 0) {
if (errno != 0) {
print_err("%s", strerror(errno));
ret = -errno;
}
ret = -EOF;
goto out_free_line;
}
*json = cJSON_Parse(line);
if (cJSON_IsInvalid(*json)) {
print_err("%s", "Invalid JSON");
ret = -EPERM;
goto out_free_line;
}
out_free_line:
free(line);
return ret;
}
int vpopen(FILE **stream, const char *file, char *const argv[], vpopen_t type)
{
int fd[2], ret;
int nullfd = -1;
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]);
if (type == VPOPEN_STDOUT)
ret = dup2(fd[1], STDOUT_FILENO);
else
ret = dup2(fd[1], STDERR_FILENO);
if (ret < 0) {
print_err("%s", strerror(errno));
goto out_close_fd_1;
}
if (evanix_opts.close_unused_fd) {
nullfd = open("/dev/null", O_WRONLY);
if (nullfd < 0) {
print_err("%s", strerror(errno));
goto out_close_fd_1;
}
if (type == VPOPEN_STDOUT)
ret = dup2(nullfd, STDERR_FILENO);
else
ret = dup2(nullfd, STDOUT_FILENO);
if (ret < 0) {
print_err("%s", strerror(errno));
goto out_close_nullfd;
}
}
execvp(file, argv);
print_err("%s", strerror(errno));
out_close_nullfd:
if (nullfd >= 0)
close(nullfd);
out_close_fd_1:
close(fd[1]);
exit(EXIT_FAILURE);
}
int atob(const char *s)
{
if (!strcmp(s, "true") || !strcmp(s, "yes") || !strcmp(s, "y"))
return true;
else if (!strcmp(s, "false") || !strcmp(s, "no") || !strcmp(s, "n"))
return false;
return -1;
}
int run(const char *file, char *argv[])
{
int ret, wstatus;
ret = fork();
switch (ret) {
case -1:
print_err("%s", strerror(errno));
return -errno;
case 0:
execvp(file, argv);
print_err("%s", strerror(errno));
exit(EXIT_FAILURE);
default:
ret = waitpid(ret, &wstatus, 0);
if (!WIFEXITED(wstatus))
return -EPERM;
return WEXITSTATUS(wstatus) == 0 ? 0 : -EPERM;
}
}
char *trim(char *s)
{
size_t end = 0;
while (isspace(*s))
s++;
for (size_t i = 0; s[i]; i++) {
if (isgraph(s[i]))
end = i + 1;
}
s[end] = '\0';
return s;
}
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