install: treat non-existent directory as empty

[elogind.git] / src / shared / util.c

diff --git a/src/shared/util.c b/src/shared/util.c
index 007f15d68092da375a7a79b42f9cda271249e33f..add3fdce53906bc89441facbbfdcc248f4c0785a 100644 (file)
--- a/src/shared/util.c
+++ b/src/shared/util.c
@@ -2050,7 +2050,7 @@ bool fstype_is_network(const char *fstype) {
                 "nfs\0"
                 "nfs4\0"
                 "gfs\0"
-                "gfs2";
+                "gfs2\0";
 
         return nulstr_contains(table, fstype);
 }
@@ -2904,9 +2904,9 @@ int make_stdio(int fd) {
 
         assert(fd >= 0);
 
-        r = dup2(fd, STDIN_FILENO);
-        s = dup2(fd, STDOUT_FILENO);
-        t = dup2(fd, STDERR_FILENO);
+        r = dup3(fd, STDIN_FILENO, 0);
+        s = dup3(fd, STDOUT_FILENO, 0);
+        t = dup3(fd, STDERR_FILENO, 0);
 
         if (fd >= 3)
                 close_nointr_nofail(fd);
@@ -2914,9 +2914,7 @@ int make_stdio(int fd) {
         if (r < 0 || s < 0 || t < 0)
                 return -errno;
 
-        fd_cloexec(STDIN_FILENO, false);
-        fd_cloexec(STDOUT_FILENO, false);
-        fd_cloexec(STDERR_FILENO, false);
+        /* We rely here that the new fd has O_CLOEXEC not set */
 
         return 0;
 }
@@ -3870,7 +3868,12 @@ int touch(const char *path) {
 
         assert(path);
 
-        if ((fd = open(path, O_WRONLY|O_CREAT|O_CLOEXEC|O_NOCTTY, 0644)) < 0)
+        /* This just opens the file for writing, ensuring it
+         * exists. It doesn't call utimensat() the way /usr/bin/touch
+         * does it. */
+
+        fd = open(path, O_WRONLY|O_CREAT|O_CLOEXEC|O_NOCTTY, 0644);
+        if (fd < 0)
                 return -errno;
 
         close_nointr_nofail(fd);
@@ -3881,6 +3884,10 @@ char *unquote(const char *s, const char* quotes) {
         size_t l;
         assert(s);
 
+        /* This is rather stupid, simply removes the heading and
+         * trailing quotes if there is one. Doesn't care about
+         * escaping or anything. */
+
         l = strlen(s);
         if (l < 2)
                 return strdup(s);
@@ -4022,10 +4029,12 @@ DIR *xopendirat(int fd, const char *name, int flags) {
         int nfd;
         DIR *d;
 
-        if ((nfd = openat(fd, name, O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC|flags)) < 0)
+        nfd = openat(fd, name, O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC|flags);
+        if (nfd < 0)
                 return NULL;
 
-        if (!(d = fdopendir(nfd))) {
+        d = fdopendir(nfd);
+        if (!d) {
                 close_nointr_nofail(nfd);
                 return NULL;
         }
@@ -4037,7 +4046,8 @@ int signal_from_string_try_harder(const char *s) {
         int signo;
         assert(s);
 
-        if ((signo = signal_from_string(s)) <= 0)
+        signo = signal_from_string(s);
+        if (signo <= 0)
                 if (startswith(s, "SIG"))
                         return signal_from_string(s+3);
 
@@ -4634,49 +4644,9 @@ int copy_file(const char *from, const char *to) {
         return 0;
 }
 
-int symlink_or_copy(const char *from, const char *to) {
-        char *pf = NULL, *pt = NULL;
-        struct stat a, b;
-        int r;
-
-        assert(from);
-        assert(to);
-
-        if (path_get_parent(from, &pf) < 0 ||
-            path_get_parent(to, &pt) < 0) {
-                r = -ENOMEM;
-                goto finish;
-        }
-
-        if (stat(pf, &a) < 0 ||
-            stat(pt, &b) < 0) {
-                r = -errno;
-                goto finish;
-        }
-
-        if (a.st_dev != b.st_dev) {
-                free(pf);
-                free(pt);
-
-                return copy_file(from, to);
-        }
-
-        if (symlink(from, to) < 0) {
-                r = -errno;
-                goto finish;
-        }
-
-        r = 0;
-
-finish:
-        free(pf);
-        free(pt);
-
-        return r;
-}
-
-int symlink_or_copy_atomic(const char *from, const char *to) {
-        char *t, *x;
+int symlink_atomic(const char *from, const char *to) {
+        char *x;
+        _cleanup_free_ char *t;
         const char *fn;
         size_t k;
         unsigned long long ull;
@@ -4704,22 +4674,16 @@ int symlink_or_copy_atomic(const char *from, const char *to) {
 
         *x = 0;
 
-        r = symlink_or_copy(from, t);
-        if (r < 0) {
-                unlink(t);
-                free(t);
-                return r;
-        }
+        if (symlink(from, t) < 0)
+                return -errno;
 
         if (rename(t, to) < 0) {
                 r = -errno;
                 unlink(t);
-                free(t);
                 return r;
         }
 
-        free(t);
-        return r;
+        return 0;
 }
 
 bool display_is_local(const char *display) {