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tmpfiles: add --exclude-prefix and -E flags #480

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Merged
troglobit merged 1 commit into from
Feb 24, 2026
Merged

tmpfiles: add --exclude-prefix and -E flags #480

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52 changes: 46 additions & 6 deletions src/tmpfiles.c
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Original file line number Diff line number Diff line change
Expand Up @@ -50,6 +50,26 @@ int create_flag = 0;
int clean_flag = 0;
int remove_flag = 0;

#define MAX_EXCLUDES 32
static const char *exclude_prefixes[MAX_EXCLUDES];
static int num_excludes;

static void add_exclude_prefix(const char *prefix)
{
if (num_excludes < MAX_EXCLUDES)
exclude_prefixes[num_excludes++] = prefix;
}

static int excluded(const char *path)
{
for (int i = 0; i < num_excludes; i++) {
if (!strncmp(path, exclude_prefixes[i], strlen(exclude_prefixes[i])))
return 1;
}

return 0;
}

static int is_dir_empty(const char *path)
{
struct dirent **namelist = NULL;
Expand Down Expand Up @@ -413,6 +433,8 @@ static void tmpfiles(char *line)
errx(1, "Path name specifiers unsupported, skipping.");
return;
}
if (excluded(path))
return;

token = strtok(NULL, "\t ");
if (token) {
Expand Down Expand Up @@ -752,6 +774,8 @@ static int usage(int rc)
" -C, --clean Clean files and directories based on age\n"
" -c, --create Create files and directories\n"
" -d, --debug Show developer debug messages\n"
" -E Exclude /dev, /proc, /run, and /sys\n"
" --exclude-prefix=PFX Ignore rules for paths starting with PFX\n"
" -r, --remove Remove files and directories marked for removal\n"
" -h, --help This help text\n"
"\n"
Expand All @@ -762,20 +786,25 @@ static int usage(int rc)
return rc;
}

enum {
OPT_EXCLUDE_PREFIX = 256,
};

int main(int argc, char *argv[])
{
struct option long_options[] = {
{ "clean", 0, NULL, 'C' },
{ "create", 0, NULL, 'c' },
{ "debug", 0, NULL, 'd' },
{ "remove", 0, NULL, 'r' },
{ "help", 0, NULL, 'h' },
{ "clean", 0, NULL, 'C' },
{ "create", 0, NULL, 'c' },
{ "debug", 0, NULL, 'd' },
{ "exclude-prefix", 1, NULL, OPT_EXCLUDE_PREFIX },
{ "remove", 0, NULL, 'r' },
{ "help", 0, NULL, 'h' },
{ NULL, 0, NULL, 0 }
};

int c;

while ((c = getopt_long(argc, argv, "Ccdrh?", long_options, NULL)) != EOF) {
while ((c = getopt_long(argc, argv, "CcdrEh?", long_options, NULL)) != EOF) {
switch(c) {
case 'C':
clean_flag = 1;
Expand All @@ -789,6 +818,17 @@ int main(int argc, char *argv[])
debug = 1;
break;

case 'E':
add_exclude_prefix("/dev");
add_exclude_prefix("/proc");
add_exclude_prefix("/run");
add_exclude_prefix("/sys");
break;

case OPT_EXCLUDE_PREFIX:
add_exclude_prefix(optarg);
break;

case 'r':
remove_flag = 1;
break;
Expand Down