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macloader: Use fchown() to change owner of the cidfile.

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Change-Id: Ia99c0ae414366d91b6d0112f50b00630749ea570
Signed-off-by: Andreas Schneider <asn@cryptomilk.org>
This commit is contained in:
Andreas Schneider 2015-01-26 23:29:18 +01:00 committed by Ethan Chen
parent 7f517d761b
commit 7558b9dda2
1 changed files with 19 additions and 7 deletions
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26
macloader/macloader.c
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@ -24,6 +24,7 @@
#include <string.h>
#include <sys/stat.h>
#include <unistd.h>
#include <pwd.h>
#include <cutils/log.h>
@ -118,6 +119,9 @@ int main() {
}
if (type != NONE) {
struct passwd *pwd;
int fd;
/* open cid file */
cidfile = fopen(CID_PATH, "w");
if(cidfile == 0) {
@ -172,20 +176,28 @@ int main() {
fd = fileno(cidfile);
amode = S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH;
ret = fchmod(fd, amode);
fclose(cidfile);
if (ret != 0) {
fclose(cidfile);
ALOGE("Can't set permissions on %s - %s\n",
CID_PATH, strerror(errno));
return 1;
}
char* chown_cmd = (char*) malloc(strlen("chown system ") + strlen(CID_PATH) + 1);
char* chgrp_cmd = (char*) malloc(strlen("chgrp system ") + strlen(CID_PATH) + 1);
sprintf(chown_cmd, "chown system %s", CID_PATH);
sprintf(chgrp_cmd, "chgrp system %s", CID_PATH);
system(chown_cmd);
system(chgrp_cmd);
pwd = getpwnam("system");
if (pwd == NULL) {
fclose(cidfile);
ALOGE("Failed to find 'system' user - %s\n",
strerror(errno));
return 1;
}
ret = fchown(fd, pwd->pw_uid, pwd->pw_gid);
fclose(cidfile);
if (ret != 0) {
ALOGE("Failed to change owner of %s - %s\n",
CID_PATH, strerror(errno));
return 1;
}
} else {
/* delete cid file if no specific type */
ALOGD("Deleting file %s\n", CID_PATH);