C read conf file - c

Question

Hello i have a problem when i try to read conf file (line by line)
this is my code :
bool EndWith(const char* haystack, const char* needle)
{
bool rv = 0;
if (haystack && needle)
{
size_t needle_size = strlen(needle);
const char* act = haystack;
while (NULL != (act = strstr(act, needle)))
{
if (*(act + needle_size) == '\0')
{
rv = 1;
break;
}
act += needle_size;
}
}
return rv;
}
FILE *file2 = fopen ("config.conf", "r");
const size_t line_size = 300;
char* line = malloc(line_size);
while (fgets(line, line_size, file2) != NULL) {
puts(line);
if(EndWith(line, "toto")) {
puts("yes");
}
}
and my conf file :
vm.user_reserve_kbytes = 131072 toto
vm.vfs_cache_pressure = 100 toto
vm.zone_reclaim_mode = 0 toto
My code return 2 "Yes" but if my conf file, if i add a line feed in first line i read my 3 lines and my code return 3 "Yes"
Why ?
i want to return 3 "Yes" without need to add a line feed in line0 of my conf file
bug retrurn :
vm.user_reserve_kbytes = 131072 toto
yes
vm.vfs_cache_pressure = 100 toto
yes
vm.zone_reclaim_mode = 0 toto
correct return (with add a line feed)
yes
vm.user_reserve_kbytes = 131072 toto
yes
vm.vfs_cache_pressure = 100 toto
yes
vm.zone_reclaim_mode = 0 toto
i tested solution Filip Kočica (thanks for your help) but i have same problem :
the code:
bool EndWith(const char* haystack, const char* needle)
{
if (haystack == NULL || needle == NULL)
{
return false;
}
const char* p;
if ((p = strstr(haystack, needle)) != NULL)
{
if (!strcmp(p, haystack + strlen(haystack) - strlen(needle)))
{
return true;
}
}
else
{
return false;
}
return false;
}
int main(int argc, char **argv)
{
FILE *file2 = fopen ("config.conf", "r");
const size_t line_size = 300;
char* line = malloc(line_size);
while (fgets(line, line_size, file2) != NULL) {
puts(line);
if (EndWith(line, "za"))
{
puts("it does.");
}
}
return 0;
}
my file config.conf :
vm.user_reserve_kbytes = 131072 za
vm.vfs_cache_pressure = 1001 za
vm.zone_reclaim_mode = 01 za

Answer 1

1]
It return's 2 becouse last row doesn't end with new line character \n.
Everytime you call getline it gives you one line from file (If there is another line).
There is no need for checking if this line really end's with NL character.
Just count how many times getline didn't return EOF.
Get puts out of condition
while (fgets(line, line_size, file2) != NULL)
{
puts(line);
puts("yes");
if(EndWith(line, /*special strings*/ ))
{
}
}
2]
bool EndWith(const char* haystack, const char* needle)
{
if (haystack == NULL || needle == NULL)
{
return false;
}
const char* p;
if ((p = strstr(haystack, needle)) != NULL)
{
if (!strcmp(p, haystack + strlen(haystack) - strlen(needle) - 1))
{
return true;
}
}
else
{
return false;
}
return false;
}
int main(int argc, char **argv)
{
FILE *file2 = fopen ("config.conf", "r");
const size_t line_size = 300;
char* line = malloc(line_size);
while (fgets(line, line_size, file2) != NULL) {
if (EndWith(line, "za"))
{
puts("it does.");
}
puts(line);
}
return 0;
}
config file:
vm.user_reserve_kbytes = 131072 za
vm.vfs_cache_pressure = 1001 za
vm.zone_reclaim_mode = 01 za
OUTPUT:
it does.
vm.user_reserve_kbytes = 131072 za
it does.
vm.vfs_cache_pressure = 1001 za
it does.
vm.zone_reclaim_mode = 01 za