util: rework strappenda(), and rename it strjoina()

[elogind.git] / src / gpt-auto-generator / gpt-auto-generator.c

diff --git a/src/gpt-auto-generator/gpt-auto-generator.c b/src/gpt-auto-generator/gpt-auto-generator.c
index 5a78087a1fd05dae6ada013e7d834d667bd940f6..5c58b58f8a35c3144ba7d59234b48efcb6df7407 100644 (file)
--- a/src/gpt-auto-generator/gpt-auto-generator.c
+++ b/src/gpt-auto-generator/gpt-auto-generator.c
@@ -26,10 +26,6 @@
 #include <sys/statfs.h>
 #include <blkid/blkid.h>
 
-#ifdef HAVE_LINUX_BTRFS_H
-#include <linux/btrfs.h>
-#endif
-
 #include "sd-id128.h"
 #include "libudev.h"
 #include "path-util.h"
@@ -45,6 +41,7 @@
 #include "fileio.h"
 #include "efivars.h"
 #include "blkid-util.h"
+#include "btrfs-util.h"
 
 static const char *arg_dest = "/tmp";
 static bool arg_enabled = true;
@@ -68,10 +65,8 @@ static int add_swap(const char *path) {
                 return log_oom();
 
         f = fopen(unit, "wxe");
-        if (!f) {
-                log_error_errno(errno, "Failed to create unit file %s: %m", unit);
-                return -errno;
-        }
+        if (!f)
+                return log_error_errno(errno, "Failed to create unit file %s: %m", unit);
 
         fprintf(f,
                 "# Automatically generated by systemd-gpt-auto-generator\n\n"
@@ -83,20 +78,16 @@ static int add_swap(const char *path) {
                 path);
 
         fflush(f);
-        if (ferror(f)) {
-                log_error_errno(errno, "Failed to write unit file %s: %m", unit);
-                return -errno;
-        }
+        if (ferror(f))
+                return log_error_errno(errno, "Failed to write unit file %s: %m", unit);
 
         lnk = strjoin(arg_dest, "/" SPECIAL_SWAP_TARGET ".wants/", name, NULL);
         if (!lnk)
                 return log_oom();
 
         mkdir_parents_label(lnk, 0755);
-        if (symlink(unit, lnk) < 0) {
-                log_error_errno(errno, "Failed to create symlink %s: %m", lnk);
-                return -errno;
-        }
+        if (symlink(unit, lnk) < 0)
+                return log_error_errno(errno, "Failed to create symlink %s: %m", lnk);
 
         return 0;
 }
@@ -128,10 +119,8 @@ static int add_cryptsetup(const char *id, const char *what, bool rw, char **devi
                 return log_oom();
 
         f = fopen(p, "wxe");
-        if (!f) {
-                log_error_errno(errno, "Failed to create unit file %s: %m", p);
-                return -errno;
-        }
+        if (!f)
+                return log_error_errno(errno, "Failed to create unit file %s: %m", p);
 
         fprintf(f,
                 "# Automatically generated by systemd-gpt-auto-generator\n\n"
@@ -155,22 +144,18 @@ static int add_cryptsetup(const char *id, const char *what, bool rw, char **devi
                 id);
 
         fflush(f);
-        if (ferror(f)) {
-                log_error_errno(errno, "Failed to write file %s: %m", p);
-                return -errno;
-        }
+        if (ferror(f))
+                return log_error_errno(errno, "Failed to write file %s: %m", p);
 
-        from = strappenda("../", n);
+        from = strjoina("../", n);
 
         to = strjoin(arg_dest, "/", d, ".wants/", n, NULL);
         if (!to)
                 return log_oom();
 
         mkdir_parents_label(to, 0755);
-        if (symlink(from, to) < 0) {
-                log_error_errno(errno, "Failed to create symlink %s: %m", to);
-                return -errno;
-        }
+        if (symlink(from, to) < 0)
+                return log_error_errno(errno, "Failed to create symlink %s: %m", to);
 
         free(to);
         to = strjoin(arg_dest, "/cryptsetup.target.requires/", n, NULL);
@@ -178,10 +163,8 @@ static int add_cryptsetup(const char *id, const char *what, bool rw, char **devi
                 return log_oom();
 
         mkdir_parents_label(to, 0755);
-        if (symlink(from, to) < 0) {
-                log_error_errno(errno, "Failed to create symlink %s: %m", to);
-                return -errno;
-        }
+        if (symlink(from, to) < 0)
+                return log_error_errno(errno, "Failed to create symlink %s: %m", to);
 
         free(to);
         to = strjoin(arg_dest, "/dev-mapper-", e, ".device.requires/", n, NULL);
@@ -189,10 +172,8 @@ static int add_cryptsetup(const char *id, const char *what, bool rw, char **devi
                 return log_oom();
 
         mkdir_parents_label(to, 0755);
-        if (symlink(from, to) < 0) {
-                log_error_errno(errno, "Failed to create symlink %s: %m", to);
-                return -errno;
-        }
+        if (symlink(from, to) < 0)
+                return log_error_errno(errno, "Failed to create symlink %s: %m", to);
 
         free(p);
         p = strjoin(arg_dest, "/dev-mapper-", e, ".device.d/50-job-timeout-sec-0.conf", NULL);
@@ -254,10 +235,8 @@ static int add_mount(
                 return log_oom();
 
         f = fopen(p, "wxe");
-        if (!f) {
-                log_error_errno(errno, "Failed to create unit file %s: %m", unit);
-                return -errno;
-        }
+        if (!f)
+                return log_error_errno(errno, "Failed to create unit file %s: %m", unit);
 
         fprintf(f,
                 "# Automatically generated by systemd-gpt-auto-generator\n\n"
@@ -286,10 +265,8 @@ static int add_mount(
         fprintf(f, "Options=%s\n", rw ? "rw" : "ro");
 
         fflush(f);
-        if (ferror(f)) {
-                log_error_errno(errno, "Failed to write unit file %s: %m", p);
-                return -errno;
-        }
+        if (ferror(f))
+                return log_error_errno(errno, "Failed to write unit file %s: %m", p);
 
         if (post) {
                 lnk = strjoin(arg_dest, "/", post, ".requires/", unit, NULL);
@@ -297,10 +274,8 @@ static int add_mount(
                         return log_oom();
 
                 mkdir_parents_label(lnk, 0755);
-                if (symlink(p, lnk) < 0) {
-                        log_error_errno(errno, "Failed to create symlink %s: %m", lnk);
-                        return -errno;
-                }
+                if (symlink(p, lnk) < 0)
+                        return log_error_errno(errno, "Failed to create symlink %s: %m", lnk);
         }
 
         return 0;
@@ -594,54 +569,6 @@ static int enumerate_partitions(dev_t devnum) {
         return r;
 }
 
-static int get_btrfs_block_device(const char *path, dev_t *dev) {
-        struct btrfs_ioctl_fs_info_args fsi = {};
-        _cleanup_close_ int fd = -1;
-        uint64_t id;
-
-        assert(path);
-        assert(dev);
-
-        fd = open(path, O_DIRECTORY|O_CLOEXEC);
-        if (fd < 0)
-                return -errno;
-
-        if (ioctl(fd, BTRFS_IOC_FS_INFO, &fsi) < 0)
-                return -errno;
-
-        /* We won't do this for btrfs RAID */
-        if (fsi.num_devices != 1)
-                return 0;
-
-        for (id = 1; id <= fsi.max_id; id++) {
-                struct btrfs_ioctl_dev_info_args di = {
-                        .devid = id,
-                };
-                struct stat st;
-
-                if (ioctl(fd, BTRFS_IOC_DEV_INFO, &di) < 0) {
-                        if (errno == ENODEV)
-                                continue;
-
-                        return -errno;
-                }
-
-                if (stat((char*) di.path, &st) < 0)
-                        return -errno;
-
-                if (!S_ISBLK(st.st_mode))
-                        return -ENODEV;
-
-                if (major(st.st_rdev) == 0)
-                        return -ENODEV;
-
-                *dev = st.st_rdev;
-                return 1;
-        }
-
-        return -ENODEV;
-}
-
 static int get_block_device(const char *path, dev_t *dev) {
         struct stat st;
         struct statfs sfs;
@@ -661,7 +588,7 @@ static int get_block_device(const char *path, dev_t *dev) {
                 return -errno;
 
         if (F_TYPE_EQUAL(sfs.f_type, BTRFS_SUPER_MAGIC))
-                return get_btrfs_block_device(path, dev);
+                return btrfs_get_block_device(path, dev);
 
         return 0;
 }