76 lines
1.7 KiB
C
76 lines
1.7 KiB
C
#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "defines.h"
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char* text(char *path, unsigned long *file_size);
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char* generic(char *path);
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char* get_mimetype(char *path){
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static char *cmd_str = "file --mime-type -b ./\"";
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unsigned long cmd_len = strlen(cmd_str);
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unsigned int path_len = strlen(path);
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char *cmd = malloc((cmd_len + path_len) + 2);
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memset(cmd, ' ', cmd_len + path_len);
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memcpy(cmd, cmd_str, cmd_len);
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memcpy(cmd + cmd_len, path, path_len);
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cmd[cmd_len + path_len] = '\"';
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cmd[cmd_len + path_len + 1] = '\0';
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FILE *cmd_open = popen(cmd, "r");
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char *line;
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size_t size = 0;
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if (getline(&line, &size, cmd_open) != -1){
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pclose(cmd_open);
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return line;
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} else {
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pclose(cmd_open);
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return "unknown";
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}
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}
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char* preview_file(file *file_current){
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/* this calls "file" on path */
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char *file_buffer;
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char *mime = get_mimetype(file_current->file_name);
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if (strstr(mime, "text")) {
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file_buffer = text(file_current->file_name, &file_current->file_size);
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} else {
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file_buffer = generic(file_current->file_name);
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}
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free(mime);
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return file_buffer;
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}
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char* text(char *path, unsigned long *file_size){
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char *file_buffer = malloc(*file_size + 1);
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FILE *fp = fopen(path, "r");
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if (fread(file_buffer, *file_size, 1, fp) != 0) {
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file_buffer[*file_size] = '\0';
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return file_buffer;
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} else {
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return "failed reading file";
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}
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}
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char* generic(char *path){
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char *cmd = concat("file ./\"", path);
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cmd = concat(cmd, "\"");
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FILE *cmd_open = popen(cmd, "r");
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char *line;
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size_t size = 0;
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if (getline(&line, &size, cmd_open) != -1) {
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pclose(cmd_open);
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return line;
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} else {
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pclose(cmd_open);
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return "failed executing shell command \"file\"";
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}
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}
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