commit: 8addd7913a743b75ef3854ab4a96fea81cc5245d
Author: William Hubbs <w.d.hubbs <AT> gmail <DOT> com>
AuthorDate: Sat Dec 5 00:02:43 2015 +0000
Commit: William Hubbs <williamh <AT> gentoo <DOT> org>
CommitDate: Tue Dec 8 18:05:59 2015 +0000
URL: https://gitweb.gentoo.org/proj/openrc.git/commit/?id=8addd791
Create detect_container() and detect_vm() functions
These functions replace rc_sys so that we can detect containers and vms
separately.
Also, we copy file_regex() to rc-misc.c and open it to all operating
systems.
src/includes/rc-misc.h | 4 ++
src/rc/rc-misc.c | 159 ++++++++++++++++++++++++++++++++++++++++++++++++-
2 files changed, 162 insertions(+), 1 deletion(-)
diff --git a/src/includes/rc-misc.h b/src/includes/rc-misc.h
index 3cce8d0..e0565b6 100644
--- a/src/includes/rc-misc.h
+++ b/src/includes/rc-misc.h
@@ -87,4 +87,8 @@ int is_writable(const char *);
#define service_stop(service) exec_service(service, "stop");
int parse_mode(mode_t *, char *);
+const char *detect_prefix(void);
+const char *get_systype(void);
+const char *detect_container(void);
+const char *detect_vm(void);
#endif
diff --git a/src/rc/rc-misc.c b/src/rc/rc-misc.c
index 27d9f81..1e2af0a 100644
--- a/src/rc/rc-misc.c
+++ b/src/rc/rc-misc.c
@@ -34,12 +34,12 @@
#ifdef __linux__
# include <sys/sysinfo.h>
-# include <regex.h>
#endif
#include <ctype.h>
#include <fcntl.h>
#include <limits.h>
+# include <regex.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
@@ -346,3 +346,160 @@ is_writable(const char *path)
return 0;
}
+
+static bool file_regex(const char *file, const char *regex)
+{
+ FILE *fp;
+ char *line = NULL;
+ size_t len = 0;
+ regex_t re;
+ bool retval = true;
+ int result;
+
+ if (!(fp = fopen(file, "r")))
+ return false;
+
+ if ((result = regcomp(&re, regex, REG_EXTENDED | REG_NOSUB)) != 0) {
+ fclose(fp);
+ line = xmalloc(sizeof(char) * BUFSIZ);
+ regerror(result, &re, line, BUFSIZ);
+ fprintf(stderr, "file_regex: %s", line);
+ free(line);
+ return false;
+ }
+
+ while ((rc_getline(&line, &len, fp))) {
+ char *str = line;
+ /* some /proc files have \0 separated content so we have to
+ loop through the 'line' */
+ do {
+ if (regexec(&re, str, 0, NULL, 0) == 0)
+ goto found;
+ str += strlen(str) + 1;
+ /* len is the size of allocated buffer and we don't
+ want call regexec BUFSIZE times. find next str */
+ while (str < line + len && *str == '\0')
+ str++;
+ } while (str < line + len);
+ }
+ retval = false;
+found:
+ fclose(fp);
+ free(line);
+ regfree(&re);
+
+ return retval;
+}
+
+const char *detect_prefix(void)
+{
+#ifdef PREFIX
+ return RC_SYS_PREFIX;
+#else
+ return NULL;
+#endif
+}
+
+const char *get_systype(void)
+{
+ char *systype = rc_conf_value("rc_sys");
+ if (systype) {
+ char *s = systype;
+ /* Convert to uppercase */
+ while (s && *s) {
+ if (islower((unsigned char) *s))
+ *s = toupper((unsigned char) *s);
+ s++;
+ }
+ }
+ return systype;
+}
+
+const char *detect_container(void)
+{
+ char *systype = get_systype();
+
+#ifdef __FreeBSD__
+ if (systype && strcmp(systype, RC_SYS_JAIL) == 0)
+ return RC_SYS_JAIL;
+ int jailed = 0;
+ size_t len = sizeof(jailed);
+
+ if (sysctlbyname("security.jail.jailed", &jailed, &len, NULL, 0) == 0)
+ if (jailed == 1)
+ return RC_SYS_JAIL;
+#endif
+
+#ifdef __linux__
+ if (systype) {
+ if (strcmp(systype, RC_SYS_UML) == 0)
+ return RC_SYS_UML;
+ if (strcmp(systype, RC_SYS_VSERVER) == 0)
+ return RC_SYS_VSERVER;
+ if (strcmp(systype, RC_SYS_OPENVZ) == 0)
+ return RC_SYS_OPENVZ;
+ if (strcmp(systype, RC_SYS_LXC) == 0)
+ return RC_SYS_LXC;
+ if (strcmp(systype, RC_SYS_RKT) == 0)
+ return RC_SYS_RKT;
+ if (strcmp(systype, RC_SYS_SYSTEMD_NSPAWN) == 0)
+ return RC_SYS_SYSTEMD_NSPAWN;
+ if (strcmp(systype, RC_SYS_DOCKER) == 0)
+ return RC_SYS_DOCKER;
+ }
+ if (file_regex("/proc/cpuinfo", "UML"))
+ return RC_SYS_UML;
+ else if (file_regex("/proc/self/status",
+ "(s_context|VxID):[[:space:]]*[1-9]"))
+ return RC_SYS_VSERVER;
+ else if (exists("/proc/vz/veinfo") && !exists("/proc/vz/version"))
+ return RC_SYS_OPENVZ;
+ else if (file_regex("/proc/self/status",
+ "envID:[[:space:]]*[1-9]"))
+ return RC_SYS_OPENVZ; /* old test */
+ else if (file_regex("/proc/1/environ", "container=lxc"))
+ return RC_SYS_LXC;
+ else if (file_regex("/proc/1/environ", "container=rkt"))
+ return RC_SYS_RKT;
+ else if (file_regex("/proc/1/environ", "container=systemd-nspawn"))
+ return RC_SYS_SYSTEMD_NSPAWN;
+ else if (file_regex("/proc/1/environ", "container=docker"))
+ return RC_SYS_DOCKER;
+#endif
+
+ return NULL;
+}
+
+const char *detect_vm(void)
+{
+ char *systype = get_systype();
+
+#ifdef __NetBSD__
+ if (systype) {
+ if(strcmp(systype, RC_SYS_XEN0) == 0)
+ return RC_SYS_XEN0;
+ if (strcmp(systype, RC_SYS_XENU) == 0)
+ return RC_SYS_XENU;
+ }
+ if (exists("/kern/xen/privcmd"))
+ return RC_SYS_XEN0;
+ if (exists("/kern/xen"))
+ return RC_SYS_XENU;
+#endif
+
+#ifdef __linux__
+ if (systype) {
+ if (strcmp(systype, RC_SYS_XEN0) == 0)
+ return RC_SYS_XEN0;
+ if (strcmp(systype, RC_SYS_XENU) == 0)
+ return RC_SYS_XENU;
+ }
+ if (exists("/proc/xen")) {
+ if (file_regex("/proc/xen/capabilities", "control_d"))
+ return RC_SYS_XEN0;
+ return RC_SYS_XENU;
+ }
+#endif
+
+ return NULL;
+}
