sysusers: add minimal tool to reconstruct /etc/passwd and /etc/group from static...

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

diff --git a/src/shared/util.c b/src/shared/util.c
index 7fa3742b4afa69f7e83e067d83c166bcee75ced2..a7aec5c54f53114b991084277055901e77f74a96 100644 (file)
--- a/src/shared/util.c
+++ b/src/shared/util.c
@@ -804,7 +804,7 @@ char *strappend(const char *s, const char *suffix) {
         return strnappend(s, suffix, suffix ? strlen(suffix) : 0);
 }
 
-int readlink_malloc(const char *p, char **ret) {
+int readlinkat_malloc(int fd, const char *p, char **ret) {
         size_t l = 100;
         int r;
 
@@ -819,7 +819,7 @@ int readlink_malloc(const char *p, char **ret) {
                 if (!c)
                         return -ENOMEM;
 
-                n = readlink(p, c, l-1);
+                n = readlinkat(fd, p, c, l-1);
                 if (n < 0) {
                         r = -errno;
                         free(c);
@@ -837,6 +837,10 @@ int readlink_malloc(const char *p, char **ret) {
         }
 }
 
+int readlink_malloc(const char *p, char **ret) {
+        return readlinkat_malloc(AT_FDCWD, p, ret);
+}
+
 int readlink_and_make_absolute(const char *p, char **r) {
         _cleanup_free_ char *target = NULL;
         char *k;
@@ -4003,24 +4007,16 @@ int fd_wait_for_event(int fd, int event, usec_t t) {
 int fopen_temporary(const char *path, FILE **_f, char **_temp_path) {
         FILE *f;
         char *t;
-        const char *fn;
-        size_t k;
         int fd;
 
         assert(path);
         assert(_f);
         assert(_temp_path);
 
-        t = new(char, strlen(path) + 1 + 6 + 1);
+        t = strappend(path, ".XXXXXX");
         if (!t)
                 return -ENOMEM;
 
-        fn = basename(path);
-        k = fn - path;
-        memcpy(t, path, k);
-        t[k] = '.';
-        stpcpy(stpcpy(t+k+1, fn), "XXXXXX");
-
         fd = mkostemp_safe(t, O_WRONLY|O_CLOEXEC);
         if (fd < 0) {
                 free(t);
@@ -4128,60 +4124,6 @@ int vt_disallocate(const char *name) {
         return 0;
 }
 
-int copy_file(const char *from, const char *to, int flags) {
-        _cleanup_close_ int fdf = -1;
-        int r, fdt;
-
-        assert(from);
-        assert(to);
-
-        fdf = open(from, O_RDONLY|O_CLOEXEC|O_NOCTTY);
-        if (fdf < 0)
-                return -errno;
-
-        fdt = open(to, flags|O_WRONLY|O_CREAT|O_CLOEXEC|O_NOCTTY, 0644);
-        if (fdt < 0)
-                return -errno;
-
-        for (;;) {
-                char buf[PIPE_BUF];
-                ssize_t n, k;
-
-                n = read(fdf, buf, sizeof(buf));
-                if (n < 0) {
-                        r = -errno;
-
-                        close_nointr(fdt);
-                        unlink(to);
-
-                        return r;
-                }
-
-                if (n == 0)
-                        break;
-
-                errno = 0;
-                k = loop_write(fdt, buf, n, false);
-                if (n != k) {
-                        r = k < 0 ? k : (errno ? -errno : -EIO);
-
-                        close_nointr(fdt);
-                        unlink(to);
-
-                        return r;
-                }
-        }
-
-        r = close_nointr(fdt);
-
-        if (r < 0) {
-                unlink(to);
-                return r;
-        }
-
-        return 0;
-}
-
 int symlink_atomic(const char *from, const char *to) {
         char *x;
         _cleanup_free_ char *t;
@@ -5507,6 +5449,7 @@ const char *draw_special_char(DrawSpecialChar ch) {
                         [DRAW_TRIANGULAR_BULLET]  = "\342\200\243",             /* ‣ */
                         [DRAW_BLACK_CIRCLE]       = "\342\227\217",             /* ● */
                         [DRAW_ARROW]              = "\342\206\222",             /* → */
+                        [DRAW_DASH]               = "\342\200\223",             /* – */
                 },
 
                 /* ASCII fallback */ {
@@ -5517,6 +5460,7 @@ const char *draw_special_char(DrawSpecialChar ch) {
                         [DRAW_TRIANGULAR_BULLET]  = ">",
                         [DRAW_BLACK_CIRCLE]       = "*",
                         [DRAW_ARROW]              = "->",
+                        [DRAW_DASH]               = "-",
                 }
         };
 
@@ -6713,3 +6657,14 @@ int bind_remount_recursive(const char *prefix, bool ro) {
                 }
         }
 }
+
+int fflush_and_check(FILE *f) {
+
+        errno = 0;
+        fflush(f);
+
+        if (ferror(f))
+                return errno ? -errno : -EIO;
+
+        return 0;
+}