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