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#include <stdio.h>
#include <string.h>
#include <sys/stat.h>
#include <unistd.h>
#include <sys/types.h>
#include <dirent.h>
#include <errno.h>
#include "common.h"
void print_help(const struct Command* commands, const size_t commands_size,
const struct Flag* flags, size_t flags_size)
{
size_t longestStr;
size_t length;
if (commands_size)
{
longestStr = 0;
for (size_t i = 0; i < commands_size; ++i)
{
length = strlen(commands[i].name);
if (length > longestStr) longestStr = length;
}
fprintf(stderr, "\nList of commands:\n");
for (size_t i = 0; i < commands_size; ++i)
{
fprintf(stderr, "\t%-*s\t %s\n", (int)longestStr, commands[i].name, commands[i].description);
}
}
if (flags_size)
{
longestStr = 0;
for (size_t i = 0; i < flags_size; ++i)
{
length = strlen(flags[i].name);
if (length > longestStr) longestStr = length;
}
fprintf(stderr, "\nList of flags:\n");
for (size_t i = 0; i < flags_size; ++i)
{
fprintf(stderr, "\t");
if (flags[i].variant & SINGLE)
fprintf(stderr, "-%c", flags[i].name[0]);
else
fprintf(stderr, " ");
if (flags[i].variant & DOUBLE)
{
if (flags[i].variant & SINGLE) fprintf(stderr, ",");
fprintf(stderr, " --%-*s", (int)longestStr, flags[i].name);
}
fprintf(stderr, "\t %s\n", flags[i].description);
}
}
}
struct stat getStat(const char* path)
{
// fill with 0s by default in the case stat fails
struct stat sb = {0};
// the return value signifies if stat failes (e.g. file not found)
// unimportant for us if it fails it won't touch sb
stat(path, &sb);
return sb;
}
int isFile(const char* path)
{
struct stat sb = getStat(path);
return S_ISREG(sb.st_mode) || S_ISLNK(sb.st_mode);
}
int isDir(const char* path)
{
struct stat sb = getStat(path);
return S_ISDIR(sb.st_mode) || S_ISLNK(sb.st_mode);
}
int makeDir(const char* path)
{
char pathcpy[PATH_MAX];
char *index;
strncpy(pathcpy, path, PATH_MAX-1); // make a mutable copy of the path
for(index = pathcpy+1; *index; ++index)
{
if (*index == '/')
{
*index = '\0';
if (mkdir(pathcpy, 0755) != 0)
{
if (errno != EEXIST)
return -1;
}
*index = '/';
}
}
return mkdir(path, 0755);
}
int removeDir(const char *path)
{
DIR *d = opendir(path);
size_t path_len = strlen(path);
int r = -1;
if (d) {
struct dirent *p;
r = 0;
while (!r && (p=readdir(d))) {
char *buf;
size_t len;
// Skip the names "." and ".." as we don't want to recurse on them.
if (!strcmp(p->d_name, ".") || !strcmp(p->d_name, ".."))
continue;
len = path_len + strlen(p->d_name) + 2;
buf = malloc(len);
if (buf) {
struct stat statbuf = {0};
snprintf(buf, len, "%s/%s", path, p->d_name);
if (!stat(buf, &statbuf)) {
if (S_ISDIR(statbuf.st_mode))
r = removeDir(buf);
else if (S_ISLNK(statbuf.st_mode))
r = unlink(buf);
else
r = remove(buf);
}
else // it is very likely that we found a dangling symlink which is not detected by stat
{
r = unlink(buf);
}
free(buf);
}
}
closedir(d);
}
if (!r)
r = rmdir(path);
return r;
}
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