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add util functions to manipulate files and directories

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write_sudo_string: add rules to /etc/sudoers.d/
write_ssh_key: add pub keys to ~/.ssh/autorized_keys

Signed-off-by: Julio Montes <julio.montes@intel.com>
This commit is contained in:
Julio Montes
2015-11-05 16:28:25 -06:00
parent a6ab9a7395
commit 7542396ef1
2 changed files with 68 additions and 0 deletions
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src/lib.c
+66
View File
@@ -44,6 +44,8 @@
#include <pwd.h>
#include <grp.h>
#include <unistd.h>
#include <fcntl.h>
#include <string.h>
#include <glib.h>
@@ -96,3 +98,67 @@ int chown_path(const char* pathname, const char* ownername, const char* groupnam
return chown(pathname, owner_id, group_id);
}
int write_sudo_string(const gchar* filename, const gchar* data) {
int fd;
gchar sudoers_file[PATH_MAX];
g_snprintf(sudoers_file, PATH_MAX, "/etc/sudoers.d/");
if (make_dir(sudoers_file, S_IRWXU|S_IRGRP|S_IXGRP|S_IROTH|S_IXOTH) != 0) {
return 1;
}
g_strlcat(sudoers_file, filename, PATH_MAX);
fd = open(sudoers_file, O_CREAT|O_APPEND|O_WRONLY, S_IRUSR|S_IRGRP);
if (-1 == fd) {
LOG(MOD "Cannot open %s\n", sudoers_file);
return 1;
}
write(fd, data, strlen(data));
write(fd, "\n", 1);
close(fd);
return 0;
}
int write_ssh_key(const gchar* ssh_key, const gchar* username) {
int fd;
gchar auth_keys_path[PATH_MAX];
struct passwd *pw;
pw = getpwnam(username);
if (pw && pw->pw_dir) {
g_snprintf(auth_keys_path, PATH_MAX, "%s/.ssh", pw->pw_dir);
if (make_dir(auth_keys_path, S_IRWXU) != 0) {
LOG(MOD "Cannot create %s.\n", auth_keys_path);
return 1;
}
if (chown_path(auth_keys_path, username, username) != 0) {
LOG(MOD "Cannot change the owner and group of %s.\n", auth_keys_path);
return 1;
}
g_strlcat(auth_keys_path, "/authorized_keys", PATH_MAX);
fd = open(auth_keys_path, O_CREAT|O_APPEND|O_WRONLY, S_IRUSR|S_IWUSR);
if (-1 == fd) {
LOG(MOD "Cannot open %s.\n", auth_keys_path);
return 1;
}
LOG(MOD "Using %s\n", auth_keys_path);
LOG(MOD "Writing %s\n", ssh_key);
write(fd, ssh_key, strlen(ssh_key));
write(fd, "\n", 1);
close(fd);
if (chown_path(auth_keys_path, username, username) != 0) {
LOG(MOD "Cannot change the owner and group of %s.\n", auth_keys_path);
return 1;
}
}
return 0;
}
src/lib.h
+2
View File
@@ -52,3 +52,5 @@ void exec_task(const gchar* task);
void LOG(const char *fmt, ...) __attribute__((format(printf, 1, 2)));
int make_dir(const char* pathname, mode_t mode);
int chown_path(const char* pathname, const char* ownername, const char* groupname);
int write_sudo_string(const gchar* filename, const gchar* data);
int write_ssh_key(const gchar* ssh_key, const gchar* username);