dwm/patch/ipc/util.c
2020-09-08 13:34:58 +02:00

136 lines
2.6 KiB
C

#include <errno.h>
#include <sys/stat.h>
int
normalizepath(const char *path, char **normal)
{
size_t len = strlen(path);
*normal = (char *)malloc((len + 1) * sizeof(char));
const char *walk = path;
const char *match;
size_t newlen = 0;
while ((match = strchr(walk, '/'))) {
// Copy everything between match and walk
strncpy(*normal + newlen, walk, match - walk);
newlen += match - walk;
walk += match - walk;
// Skip all repeating slashes
while (*walk == '/')
walk++;
// If not last character in path
if (walk != path + len)
(*normal)[newlen++] = '/';
}
(*normal)[newlen++] = '\0';
// Copy remaining path
strcat(*normal, walk);
newlen += strlen(walk);
*normal = (char *)realloc(*normal, newlen * sizeof(char));
return 0;
}
int
parentdir(const char *path, char **parent)
{
char *normal;
char *walk;
normalizepath(path, &normal);
// Pointer to last '/'
if (!(walk = strrchr(normal, '/'))) {
free(normal);
return -1;
}
// Get path up to last '/'
size_t len = walk - normal;
*parent = (char *)malloc((len + 1) * sizeof(char));
// Copy path up to last '/'
strncpy(*parent, normal, len);
// Add null char
(*parent)[len] = '\0';
free(normal);
return 0;
}
int
mkdirp(const char *path)
{
char *normal;
char *walk;
size_t normallen;
normalizepath(path, &normal);
normallen = strlen(normal);
walk = normal;
while (walk < normal + normallen + 1) {
// Get length from walk to next /
size_t n = strcspn(walk, "/");
// Skip path /
if (n == 0) {
walk++;
continue;
}
// Length of current path segment
size_t curpathlen = walk - normal + n;
char curpath[curpathlen + 1];
struct stat s;
// Copy path segment to stat
strncpy(curpath, normal, curpathlen);
strcpy(curpath + curpathlen, "");
int res = stat(curpath, &s);
if (res < 0) {
if (errno == ENOENT) {
DEBUG("Making directory %s\n", curpath);
if (mkdir(curpath, 0700) < 0) {
fprintf(stderr, "Failed to make directory %s\n", curpath);
perror("");
free(normal);
return -1;
}
} else {
fprintf(stderr, "Error statting directory %s\n", curpath);
perror("");
free(normal);
return -1;
}
}
// Continue to next path segment
walk += n;
}
free(normal);
return 0;
}
int
nullterminate(char **str, size_t *len)
{
if ((*str)[*len - 1] == '\0')
return 0;
(*len)++;
*str = (char*)realloc(*str, *len * sizeof(char));
(*str)[*len - 1] = '\0';
return 0;
}