X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=blobdiff_plain;f=src%2Futil.c;h=0988675f09be39f291cd565b446ffeb0dba4dd1f;hp=7664df59d06359150f0a5c1a82d13b16800038ed;hb=ef2f1067d0ca0e6d7346aa3e082048821b670b54;hpb=01f78473b104d28db0fa813414092bc6358ae521

diff --git a/src/util.c b/src/util.c
index 7664df59d..0988675f0 100644
--- a/src/util.c
+++ b/src/util.c
@@ -43,6 +43,9 @@
 #include <sys/poll.h>
 #include <libgen.h>
 #include <ctype.h>
+#include <sys/prctl.h>
+#include <sys/utsname.h>
+#include <pwd.h>
 
 #include "macro.h"
 #include "util.h"
@@ -222,6 +225,13 @@ void close_nointr_nofail(int fd) {
         errno = saved_errno;
 }
 
+void close_many(const int fds[], unsigned n_fd) {
+        unsigned i;
+
+        for (i = 0; i < n_fd; i++)
+                close_nointr_nofail(fds[i]);
+}
+
 int parse_boolean(const char *v) {
         assert(v);
 
@@ -233,6 +243,29 @@ int parse_boolean(const char *v) {
         return -EINVAL;
 }
 
+int parse_pid(const char *s, pid_t* ret_pid) {
+        unsigned long ul;
+        pid_t pid;
+        int r;
+
+        assert(s);
+        assert(ret_pid);
+
+        if ((r = safe_atolu(s, &ul)) < 0)
+                return r;
+
+        pid = (pid_t) ul;
+
+        if ((unsigned long) pid != ul)
+                return -ERANGE;
+
+        if (pid <= 0)
+                return -ERANGE;
+
+        *ret_pid = pid;
+        return 0;
+}
+
 int safe_atou(const char *s, unsigned *ret_u) {
         char *x = NULL;
         unsigned long l;
@@ -582,6 +615,26 @@ int readlink_malloc(const char *p, char **r) {
         }
 }
 
+int readlink_and_make_absolute(const char *p, char **r) {
+        char *target, *k;
+        int j;
+
+        assert(p);
+        assert(r);
+
+        if ((j = readlink_malloc(p, &target)) < 0)
+                return j;
+
+        k = file_in_same_dir(p, target);
+        free(target);
+
+        if (!k)
+                return -ENOMEM;
+
+        *r = k;
+        return 0;
+}
+
 char *file_name_from_path(const char *p) {
         char *r;
 
@@ -2121,6 +2174,113 @@ int dir_is_empty(const char *path) {
         return r;
 }
 
+unsigned long long random_ull(void) {
+        int fd;
+        uint64_t ull;
+        ssize_t r;
+
+        if ((fd = open("/dev/urandom", O_RDONLY|O_CLOEXEC|O_NOCTTY)) < 0)
+                goto fallback;
+
+        r = loop_read(fd, &ull, sizeof(ull));
+        close_nointr_nofail(fd);
+
+        if (r != sizeof(ull))
+                goto fallback;
+
+        return ull;
+
+fallback:
+        return random() * RAND_MAX + random();
+}
+
+void rename_process(const char name[8]) {
+        assert(name);
+
+        prctl(PR_SET_NAME, name);
+
+        /* This is a like a poor man's setproctitle(). The string
+         * passed should fit in 7 chars (i.e. the length of
+         * "systemd") */
+
+        if (program_invocation_name)
+                strncpy(program_invocation_name, name, strlen(program_invocation_name));
+}
+
+void sigset_add_many(sigset_t *ss, ...) {
+        va_list ap;
+        int sig;
+
+        assert(ss);
+
+        va_start(ap, ss);
+        while ((sig = va_arg(ap, int)) > 0)
+                assert_se(sigaddset(ss, sig) == 0);
+        va_end(ap);
+}
+
+char* gethostname_malloc(void) {
+        struct utsname u;
+
+        assert_se(uname(&u) >= 0);
+
+        if (u.nodename[0])
+                return strdup(u.nodename);
+
+        return strdup(u.sysname);
+}
+
+char* getlogname_malloc(void) {
+        uid_t uid;
+        long bufsize;
+        char *buf, *name;
+        struct passwd pwbuf, *pw = NULL;
+        struct stat st;
+
+        if (isatty(STDIN_FILENO) && fstat(STDIN_FILENO, &st) >= 0)
+                uid = st.st_uid;
+        else
+                uid = getuid();
+
+        /* Shortcut things to avoid NSS lookups */
+        if (uid == 0)
+                return strdup("root");
+
+        if ((bufsize = sysconf(_SC_GETPW_R_SIZE_MAX)) <= 0)
+                bufsize = 4096;
+
+        if (!(buf = malloc(bufsize)))
+                return NULL;
+
+        if (getpwuid_r(uid, &pwbuf, buf, bufsize, &pw) == 0 && pw) {
+                name = strdup(pw->pw_name);
+                free(buf);
+                return name;
+        }
+
+        free(buf);
+
+        if (asprintf(&name, "%lu", (unsigned long) uid) < 0)
+                return NULL;
+
+        return name;
+}
+
+char *getttyname_malloc(void) {
+        char path[PATH_MAX], *p;
+
+        if (ttyname_r(STDIN_FILENO, path, sizeof(path)) < 0)
+                return strdup("unknown");
+
+        char_array_0(path);
+
+        p = path;
+        if (startswith(path, "/dev/"))
+                p += 5;
+
+        return strdup(p);
+}
+
 static const char *const ioprio_class_table[] = {
         [IOPRIO_CLASS_NONE] = "none",
         [IOPRIO_CLASS_RT] = "realtime",