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#include <dirent.h>
#include <stdio.h>
#include <string.h>
#include <errno.h>
#include <sys/stat.h>
#define STATUS_FILE "/var/lib/lowmem"
#define TEMPLATE_FILE_EXTENSION ".templates"
#define TEMPLATE_LINE_MAX_LENGTH 2048
#define DEFAULT_TO_REMOVE "Default-"
#define DESCRIPTION_TO_REMOVE "Description-"
#define CHOICES_TO_REMOVE "Choices-"
#define DEFAULT_TO_KEEP "Default-en"
#define DESCRIPTION_TO_KEEP "Description-en"
#define CHOICES_TO_KEEP "Choices-en"
#define FILENAME_LENGTH 256
int trimtemplate(char *filename) {
int ignore = 0;
FILE *fd = NULL;
FILE *tmpfd = NULL;
char template_line[TEMPLATE_LINE_MAX_LENGTH];
char tmpfilename[FILENAME_LENGTH];
if ((fd = fopen(filename, "r")) == NULL) {
perror("unable to open template file");
return 0;
}
snprintf(tmpfilename,
FILENAME_LENGTH,"%s.%s",
filename,"tmp");
if ((tmpfd = fopen(tmpfilename, "w")) == NULL) {
perror("unable to open temp file");
return 0;
}
ignore = 0;
/* parse template file */
while (fgets(template_line,
TEMPLATE_LINE_MAX_LENGTH, fd) != NULL) {
if (ignore &&
strstr(template_line, " ") == template_line) {
continue;
}
ignore = 0;
if (strstr(template_line, DESCRIPTION_TO_REMOVE)
|| strstr(template_line, CHOICES_TO_REMOVE)
|| strstr(template_line, DEFAULT_TO_REMOVE)
) {
if (strstr(template_line, DESCRIPTION_TO_KEEP)
|| strstr(template_line, CHOICES_TO_KEEP)
|| strstr(template_line, DEFAULT_TO_KEEP)
) {
ignore = 0;
continue;
} else {
ignore = 1;
continue;
}
}
if (fputs(template_line, tmpfd) == EOF) {
perror("unable to write to temp file");
return 0;
}
}
fclose(tmpfd);
fclose(fd);
if( rename(tmpfilename, filename) != 0) {
perror("unable to rename temp to template file");
return 0;
}
return 1;
}
int main(int argc, char** argv) {
struct stat buf;
if (argc < 2) {
return 0;
}
if ( stat(argv[1], &buf) == -1 ) {
perror("unable to get info about specified file or directory");
return 0;
}
/* test if lowmem is activated */
if( rename(STATUS_FILE, STATUS_FILE) != 0) {
return 0;
}
if (S_ISDIR(buf.st_mode)) {
DIR *dip = NULL;
struct dirent *dit = NULL;
char *dir = NULL;
char abs_path_file_name[FILENAME_LENGTH];
dir = argv[1];
if ((dip = opendir(dir)) == NULL) {
return 0;
}
while ((dit = readdir(dip)) != NULL) {
/* select only template files */
if (strstr(dit->d_name, TEMPLATE_FILE_EXTENSION) != NULL) {
snprintf(abs_path_file_name,
FILENAME_LENGTH,"%s/%s",dir,dit->d_name);
if (trimtemplate(abs_path_file_name) == 0) {
return 0;
}
}
}
if (closedir(dip) == -1) {
return 0;
}
return 1;
}
if (S_ISREG(buf.st_mode)) {
char *filename = NULL;
filename = argv[1];
if (trimtemplate(filename) == 0) {
return 0;
}
return 1;
}
return 0;
}
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