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Commit 440da2d4 authored by Luis Hector Chavez's avatar Luis Hector Chavez
Browse files

Make mksquashfs generate a fs_config-friendly root entry 

This change adds a flag so that the mksquashfs wrapper scripts generate
an entry that is fs_config-friendly for the root inode. Namely, the root
entry is expected to have an empty filename.

Bug: 72745016
Test: m -j100 dist
Change-Id: Iebdf79c5af0b9d999b7e5f5fe240abfe52cbadda
parent 259b2741

core/Makefile

+1 −1
Original line number Diff line number Diff line
@@ -2342,7 +2342,7 @@ endif 
# $1: root directory

# $2: add prefix

define fs_config

(cd $(1); find . -type d | sed 's,$$,/,'; find . \! -type d) | cut -c 3- | sort | sed 's,^,$(2),' | $(HOST_OUT_EXECUTABLES)/fs_config -C -D $(TARGET_OUT) -S $(SELINUX_FC)

(cd $(1); find . -type d | sed 's,$$,/,'; find . \! -type d) | cut -c 3- | sort | sed 's,^,$(2),' | $(HOST_OUT_EXECUTABLES)/fs_config -C -D $(TARGET_OUT) -S $(SELINUX_FC) -R "$(2)"

endef



# Depending on the various images guarantees that the underlying

tools/fs_config/fs_config.c

+18 −2
Original line number Diff line number Diff line
@@ -67,17 +67,18 @@ static struct selabel_handle* get_sehnd(const char* context_file) { 
}



static void usage() {

  fprintf(stderr, "Usage: fs_config [-D product_out_path] [-S context_file] [-C]\n");

  fprintf(stderr, "Usage: fs_config [-D product_out_path] [-S context_file] [-R root] [-C]\n");

}



int main(int argc, char** argv) {

  char buffer[1024];

  const char* context_file = NULL;

  const char* product_out_path = NULL;

  char* root_path = NULL;

  struct selabel_handle* sehnd = NULL;

  int print_capabilities = 0;

  int opt;

  while((opt = getopt(argc, argv, "CS:D:")) != -1) {

  while((opt = getopt(argc, argv, "CS:R:D:")) != -1) {

    switch(opt) {

    case 'C':

      print_capabilities = 1;
@@ -85,6 +86,9 @@ int main(int argc, char** argv) { 
    case 'S':

      context_file = optarg;

      break;

    case 'R':

      root_path = optarg;

      break;

    case 'D':

      product_out_path = optarg;

      break;
@@ -98,6 +102,14 @@ int main(int argc, char** argv) { 
    sehnd = get_sehnd(context_file);

  }



  if (root_path != NULL) {

    size_t root_len = strlen(root_path);

    /* Trim any trailing slashes from the root path. */

    while (root_len && root_path[--root_len] == '/') {

      root_path[root_len] = '\0';

    }

  }



  while (fgets(buffer, 1023, stdin) != NULL) {

    int is_dir = 0;

    int i;
@@ -122,6 +134,10 @@ int main(int argc, char** argv) { 
    unsigned uid = 0, gid = 0, mode = 0;

    uint64_t capabilities;

    fs_config(buffer, is_dir, product_out_path, &uid, &gid, &mode, &capabilities);

    if (root_path != NULL && strcmp(buffer, root_path) == 0) {

      /* The root of the filesystem needs to be an empty string. */

      strcpy(buffer, "");

    }

    printf("%s %d %d %o", buffer, uid, gid, mode);



    if (sehnd != NULL) {