cppcheck/htdocs/archive/renamefile.c

100 lines
2.5 KiB
C
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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include "webarchive.h"
const char *validate(const char *data)
{
int i;
// name1
if (strncmp(data,"name1=",6) != 0)
return "invalid query string: must start with 'name1='";
i = 6;
while (isalnum(data[i]))
i++;
if (i == 6)
return "invalid query string: no name1";
if (i > 36)
return "invalid query string: max name1 size is 30";
// name2
const int i1 = i;
if (strncmp(data+i,"&name2=",7) != 0)
return "invalid query string: no name2";
i += 7;
if (!isalnum(data[i]))
return "invalid query string: empty name2";
while (isalnum(data[i]))
i++;
if (i - i1 > 37)
return "invalid query string: max name2 size is 30";
if (data[i] != '\0')
return "invalid query string: invalid char in name2";
return NULL;
}
int main()
{
const char *query_string = getenv("QUERY_STRING");
if (query_string == NULL) {
generatepage("Internal error: empty/invalid data");
} else if (NULL != validate(query_string)) {
generatepage(validate(query_string));
} else {
char *data[MAX_RECORDS] = {0};
if (!readdata(data, MAX_RECORDS)) {
generatepage("access failed, try again");
return EXIT_SUCCESS;
}
sortdata(data, MAX_RECORDS);
// Get name1 and name2..
char buf[strlen(query_string)];
strcpy(buf, query_string);
const char * const name1 = strstr(buf, "name1=") + 6;
const char * const name2 = strstr(buf, "name2=") + 6;
for (int i = 0; buf[i] != '\0'; i++) {
if (buf[i] == '&')
buf[i] = '\0';
}
int index = -1;
for (int i = 0; i < MAX_RECORDS && data[i]; i++) {
if (strcmp(name1, getname(data[i])) == 0) {
index = i;
break;
}
}
if (index == -1) {
generatepage("file not found");
return EXIT_SUCCESS;
}
FILE *f = fopen("data.txt", "wt");
if (f == NULL) {
generatepage("failed to rename file (access denied), try again");
return EXIT_SUCCESS;
}
for (int i = 0; i < MAX_RECORDS && data[i]; i++) {
if (i == index)
fprintf(f, "name=%s%s\n", name2, data[i]+5+strlen(name1));
else
fprintf(f, "%s\n", data[i]);
}
fclose(f);
generatepage("file renamed");
}
return EXIT_SUCCESS;
}