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install: refuse installation of symlinked units

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This commit is contained in:
Lennart Poettering 2010-07-16 02:56:40 +02:00
parent 7461d1b76f
commit 992f87e192
1 changed files with 16 additions and 5 deletions
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21
src/install.c
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@ -24,6 +24,7 @@
#include <getopt.h>
#include <errno.h>
#include <unistd.h>
#include <fcntl.h>
#include "log.h"
#include "path-lookup.h"
@ -722,22 +723,32 @@ static int install_info_apply(LookupPaths *paths, InstallInfo *i, const char *co
assert(i);
STRV_FOREACH(p, paths->unit_path) {
int fd;
if (!(filename = path_make_absolute(i->name, *p))) {
log_error("Out of memory");
return -ENOMEM;
}
if ((f = fopen(filename, "re")))
break;
/* Ensure that we don't follow symlinks */
if ((fd = open(filename, O_RDONLY|O_CLOEXEC|O_NOFOLLOW|O_NOCTTY)) >= 0)
if ((f = fdopen(fd, "re")))
break;
free(filename);
filename = NULL;
if (errno == ELOOP) {
log_error("Refusing to operate on symlinks, please pass unit names or absolute paths to unit files.");
free(filename);
return -errno;
}
if (errno != ENOENT) {
log_error("Failed to open %s: %m", filename);
free(filename);
return -errno;
}
free(filename);
filename = NULL;
}
if (!f) {
@ -810,7 +821,7 @@ static int do_realize(bool enabled) {
}
if (arg_where == WHERE_SYSTEM && sd_booted() <= 0) {
log_info("systemd is not running, --realize has not effect.");
log_info("systemd is not running, --realize has no effect.");
return 0;
}