crtxcr/exile.h
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enter_namespaces(): Check fopen/fprintf errors

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Albert S. 2021-09-12 20:00:03 +02:00
parent ebe043c08d
commit 11d64c6fcf
1 changed files with 30 additions and 4 deletions
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34
qssb.h
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@ -618,17 +618,43 @@ static int enter_namespaces(int namespace_options)
uid_t current_uid = getuid(); uid_t current_uid = getuid();
gid_t current_gid = getgid(); gid_t current_gid = getgid();
//TODO: check errors
FILE *fp = fopen("/proc/self/setgroups", "w"); FILE *fp = fopen("/proc/self/setgroups", "w");
fprintf(fp, "deny"); if(fp == NULL)
{
QSSB_LOG_ERROR("fopen failed while trying to deny setgroups\n");
return -1;
}
if(fprintf(fp, "deny") < 0)
{
QSSB_LOG_ERROR("fprintf failed while trying to write uid_map\n");
return -1;
}
fclose(fp); fclose(fp);
fp = fopen("/proc/self/uid_map", "w"); fp = fopen("/proc/self/uid_map", "w");
fprintf(fp, "0 %i", current_uid); if(fp == NULL)
{
QSSB_LOG_ERROR("fopen failed while trying to write uid_map\n");
return -1;
}
if(fprintf(fp, "0 %i", current_uid) < 0)
{
QSSB_LOG_ERROR("fprintf failed while trying to write uid_map\n");
return -1;
}
fclose(fp); fclose(fp);
fp = fopen("/proc/self/gid_map", "w"); fp = fopen("/proc/self/gid_map", "w");
fprintf(fp, "0 %i", current_gid); if(fp == NULL)
{
QSSB_LOG_ERROR("fopen failed while trying to write gid_map\n");
return -1;
}
if(fprintf(fp, "0 %i", current_gid) < 0)
{
QSSB_LOG_ERROR("fprintf failed while trying to write gid_map\n");
return -1;
}
fclose(fp); fclose(fp);
} }