stephenseo/SimpleArchiver
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Handle symbolic links separately
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Previous implementation could loop forever following a symbolic link
that goes backwards. This commit makes symbolic links an "unhandled file
type" for now.
This commit is contained in:
Stephen Seo 2024-07-03 20:25:42 +09:00
parent c9df661cd3
commit 6ee347da12
1 changed files with 13 additions and 7 deletions
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20
src/parser.c
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@ -23,8 +23,10 @@
#include <string.h> #include <string.h>
#include "platforms.h" #include "platforms.h"
#if SIMPLE_ARCHIVER_PLATFORM == SIMPLE_ARCHIVER_PLATFORM_LINUX #if SIMPLE_ARCHIVER_PLATFORM == SIMPLE_ARCHIVER_PLATFORM_LINUX || \
SIMPLE_ARCHIVER_PLATFORM == SIMPLE_ARCHIVER_PLATFORM_COSMOPOLITAN
#include <dirent.h> #include <dirent.h>
#include <fcntl.h>
#include <sys/stat.h> #include <sys/stat.h>
#include <sys/types.h> #include <sys/types.h>
#endif #endif
@ -252,8 +254,10 @@ SDArchiverLinkedList *simple_archiver_parsed_to_filenames(
SIMPLE_ARCHIVER_PLATFORM == SIMPLE_ARCHIVER_PLATFORM_LINUX SIMPLE_ARCHIVER_PLATFORM == SIMPLE_ARCHIVER_PLATFORM_LINUX
for (char **iter = parsed->working_files; iter && *iter; ++iter) { for (char **iter = parsed->working_files; iter && *iter; ++iter) {
struct stat st; struct stat st;
stat(*iter, &st); fstatat(AT_FDCWD, *iter, &st, AT_SYMLINK_NOFOLLOW);
if ((st.st_mode & S_IFMT) == S_IFREG) { if ((st.st_mode & S_IFMT) == S_IFLNK) {
// Is a symbolic link. TODO handle this.
} else if ((st.st_mode & S_IFMT) == S_IFREG) {
// Is a regular file. // Is a regular file.
int len = strlen(*iter) + 1; int len = strlen(*iter) + 1;
char *filename = malloc(len); char *filename = malloc(len);
@ -291,8 +295,10 @@ SDArchiverLinkedList *simple_archiver_parsed_to_filenames(
char *combined_path = malloc(combined_size); char *combined_path = malloc(combined_size);
snprintf(combined_path, combined_size, "%s/%s", next, snprintf(combined_path, combined_size, "%s/%s", next,
dir_entry->d_name); dir_entry->d_name);
stat(combined_path, &st); fstatat(AT_FDCWD, combined_path, &st, AT_SYMLINK_NOFOLLOW);
if ((st.st_mode & S_IFMT) == S_IFREG) { if ((st.st_mode & S_IFMT) == S_IFLNK) {
// Is a symbolic link. TODO handle this.
} else if ((st.st_mode & S_IFMT) == S_IFREG) {
// Is a file. // Is a file.
if (simple_archiver_hash_map_get(hash_map, combined_path, if (simple_archiver_hash_map_get(hash_map, combined_path,
combined_size - 1) == NULL) { combined_size - 1) == NULL) {
@ -308,7 +314,7 @@ SDArchiverLinkedList *simple_archiver_parsed_to_filenames(
// Is a directory. // Is a directory.
simple_archiver_list_add_front(dir_list, combined_path, NULL); simple_archiver_list_add_front(dir_list, combined_path, NULL);
} else { } else {
// Unhandled type. // Unhandled type. TODO handle this.
free(combined_path); free(combined_path);
} }
} }
@ -320,7 +326,7 @@ SDArchiverLinkedList *simple_archiver_parsed_to_filenames(
} }
} }
} else { } else {
// Unhandled type. // Unhandled type. TODO handle this.
} }
} }
#endif #endif