Small utility collection for dealing with file archives that have dependencies
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pkg-utils/lib/util/canonicalize_name.c

56 lines
823 B

/* SPDX-License-Identifier: ISC */
#include <string.h>
#include "util/util.h"
int canonicalize_name(char *filename)
{
char *ptr = filename;
int i;
while (*ptr == '/')
++ptr;
if (ptr != filename) {
memmove(filename, ptr, strlen(ptr) + 1);
ptr = filename;
}
while (*ptr != '\0') {
if (*ptr == '/') {
for (i = 0; ptr[i] == '/'; ++i)
;
if (i > 1)
memmove(ptr + 1, ptr + i, strlen(ptr + i) + 1);
}
if (ptr[0] == '/' && ptr[1] == '\0') {
*ptr = '\0';
break;
}
++ptr;
}
ptr = filename;
while (*ptr != '\0') {
if (ptr[0] == '.') {
if (ptr[1] == '/' || ptr[1] == '\0')
return -1;
if (ptr[1] == '.' &&
(ptr[2] == '/' || ptr[2] == '\0')) {
return -1;
}
}
while (*ptr != '\0' && *ptr != '/')
++ptr;
if (*ptr == '/')
++ptr;
}
return 0;
}