The code for handling batches is largely the same across iproute2 tools.
Extract a helper to handle the batch, and adjust the tools to dispatch to
this helper. Sandwitch the invocation between prologue / epilogue code
specific for each tool.

Signed-off-by: Petr Machata <m...@pmachata.org>
---
 bridge/bridge.c   | 38 +++++++-------------------------------
 devlink/devlink.c | 41 +++++++----------------------------------
 include/utils.h   |  3 +++
 ip/ip.c           | 46 ++++++++++------------------------------------
 lib/utils.c       | 40 ++++++++++++++++++++++++++++++++++++++++
 rdma/rdma.c       | 38 +++++++-------------------------------
 tc/tc.c           | 38 +++++++-------------------------------
 7 files changed, 81 insertions(+), 163 deletions(-)

diff --git a/bridge/bridge.c b/bridge/bridge.c
index 453d689732bd..8f691cfdd466 100644
--- a/bridge/bridge.c
+++ b/bridge/bridge.c
@@ -77,20 +77,14 @@ static int do_cmd(const char *argv0, int argc, char **argv)
        return -1;
 }
 
-static int batch(const char *name)
+static int br_batch_cmd(int argc, char *argv[], void *data)
 {
-       char *line = NULL;
-       size_t len = 0;
-       int ret = EXIT_SUCCESS;
+       return do_cmd(argv[0], argc, argv);
+}
 
-       if (name && strcmp(name, "-") != 0) {
-               if (freopen(name, "r", stdin) == NULL) {
-                       fprintf(stderr,
-                               "Cannot open file \"%s\" for reading: %s\n",
-                               name, strerror(errno));
-                       return EXIT_FAILURE;
-               }
-       }
+static int batch(const char *name)
+{
+       int ret;
 
        if (rtnl_open(&rth, 0) < 0) {
                fprintf(stderr, "Cannot open rtnetlink\n");
@@ -99,25 +93,7 @@ static int batch(const char *name)
 
        rtnl_set_strict_dump(&rth);
 
-       cmdlineno = 0;
-       while (getcmdline(&line, &len, stdin) != -1) {
-               char *largv[100];
-               int largc;
-
-               largc = makeargs(line, largv, 100);
-               if (largc == 0)
-                       continue;       /* blank line */
-
-               if (do_cmd(largv[0], largc, largv)) {
-                       fprintf(stderr, "Command failed %s:%d\n",
-                               name, cmdlineno);
-                       ret = EXIT_FAILURE;
-                       if (!force)
-                               break;
-               }
-       }
-       if (line)
-               free(line);
+       ret = do_batch(name, force, br_batch_cmd, NULL);
 
        rtnl_close(&rth);
        return ret;
diff --git a/devlink/devlink.c b/devlink/devlink.c
index 007677a5c564..7dba42c602b3 100644
--- a/devlink/devlink.c
+++ b/devlink/devlink.c
@@ -7745,43 +7745,16 @@ static void dl_free(struct dl *dl)
        free(dl);
 }
 
-static int dl_batch(struct dl *dl, const char *name, bool force)
+static int dl_batch_cmd(int argc, char *argv[], void *data)
 {
-       char *line = NULL;
-       size_t len = 0;
-       int ret = EXIT_SUCCESS;
-
-       if (name && strcmp(name, "-") != 0) {
-               if (freopen(name, "r", stdin) == NULL) {
-                       fprintf(stderr,
-                               "Cannot open file \"%s\" for reading: %s\n",
-                               name, strerror(errno));
-                       return EXIT_FAILURE;
-               }
-       }
-
-       cmdlineno = 0;
-       while (getcmdline(&line, &len, stdin) != -1) {
-               char *largv[100];
-               int largc;
-
-               largc = makeargs(line, largv, 100);
-               if (!largc)
-                       continue;       /* blank line */
-
-               if (dl_cmd(dl, largc, largv)) {
-                       fprintf(stderr, "Command failed %s:%d\n",
-                               name, cmdlineno);
-                       ret = EXIT_FAILURE;
-                       if (!force)
-                               break;
-               }
-       }
+       struct dl *dl = data;
 
-       if (line)
-               free(line);
+       return dl_cmd(dl, argc, argv);
+}
 
-       return ret;
+static int dl_batch(struct dl *dl, const char *name, bool force)
+{
+       return do_batch(name, force, dl_batch_cmd, dl);
 }
 
 int main(int argc, char **argv)
diff --git a/include/utils.h b/include/utils.h
index 7041c4612e46..085b17b1f6e3 100644
--- a/include/utils.h
+++ b/include/utils.h
@@ -322,4 +322,7 @@ int get_time64(__s64 *time, const char *str);
 char *sprint_time(__u32 time, char *buf);
 char *sprint_time64(__s64 time, char *buf);
 
+int do_batch(const char *name, bool force,
+            int (*cmd)(int argc, char *argv[], void *user), void *user);
+
 #endif /* __UTILS_H__ */
diff --git a/ip/ip.c b/ip/ip.c
index ac4450235370..5e31957f2420 100644
--- a/ip/ip.c
+++ b/ip/ip.c
@@ -121,56 +121,30 @@ static int do_cmd(const char *argv0, int argc, char 
**argv)
        return EXIT_FAILURE;
 }
 
-static int batch(const char *name)
+static int ip_batch_cmd(int argc, char *argv[], void *data)
 {
-       char *line = NULL;
-       size_t len = 0;
-       int ret = EXIT_SUCCESS;
-       int orig_family = preferred_family;
+       const int *orig_family = data;
 
-       batch_mode = 1;
+       preferred_family = *orig_family;
+       return do_cmd(argv[0], argc, argv);
+}
 
-       if (name && strcmp(name, "-") != 0) {
-               if (freopen(name, "r", stdin) == NULL) {
-                       fprintf(stderr,
-                               "Cannot open file \"%s\" for reading: %s\n",
-                               name, strerror(errno));
-                       return EXIT_FAILURE;
-               }
-       }
+static int batch(const char *name)
+{
+       int orig_family = preferred_family;
+       int ret;
 
        if (rtnl_open(&rth, 0) < 0) {
                fprintf(stderr, "Cannot open rtnetlink\n");
                return EXIT_FAILURE;
        }
 
-       cmdlineno = 0;
-       while (getcmdline(&line, &len, stdin) != -1) {
-               char *largv[100];
-               int largc;
-
-               preferred_family = orig_family;
-
-               largc = makeargs(line, largv, 100);
-               if (largc == 0)
-                       continue;       /* blank line */
-
-               if (do_cmd(largv[0], largc, largv)) {
-                       fprintf(stderr, "Command failed %s:%d\n",
-                               name, cmdlineno);
-                       ret = EXIT_FAILURE;
-                       if (!force)
-                               break;
-               }
-       }
-       if (line)
-               free(line);
+       ret = do_batch(name, force, ip_batch_cmd, &orig_family);
 
        rtnl_close(&rth);
        return ret;
 }
 
-
 int main(int argc, char **argv)
 {
        char *basename;
diff --git a/lib/utils.c b/lib/utils.c
index c98021d6ecad..9815e328c9e0 100644
--- a/lib/utils.c
+++ b/lib/utils.c
@@ -1695,3 +1695,43 @@ char *sprint_time64(__s64 time, char *buf)
        print_time64(buf, SPRINT_BSIZE-1, time);
        return buf;
 }
+
+int do_batch(const char *name, bool force,
+            int (*cmd)(int argc, char *argv[], void *data), void *data)
+{
+       char *line = NULL;
+       size_t len = 0;
+       int ret = EXIT_SUCCESS;
+
+       if (name && strcmp(name, "-") != 0) {
+               if (freopen(name, "r", stdin) == NULL) {
+                       fprintf(stderr,
+                               "Cannot open file \"%s\" for reading: %s\n",
+                               name, strerror(errno));
+                       return EXIT_FAILURE;
+               }
+       }
+
+       cmdlineno = 0;
+       while (getcmdline(&line, &len, stdin) != -1) {
+               char *largv[100];
+               int largc;
+
+               largc = makeargs(line, largv, 100);
+               if (!largc)
+                       continue;       /* blank line */
+
+               if (cmd(largc, largv, data)) {
+                       fprintf(stderr, "Command failed %s:%d\n",
+                               name, cmdlineno);
+                       ret = EXIT_FAILURE;
+                       if (!force)
+                               break;
+               }
+       }
+
+       if (line)
+               free(line);
+
+       return ret;
+}
diff --git a/rdma/rdma.c b/rdma/rdma.c
index 9ea2d17ffe9e..8dc2d3e344be 100644
--- a/rdma/rdma.c
+++ b/rdma/rdma.c
@@ -41,40 +41,16 @@ static int rd_cmd(struct rd *rd, int argc, char **argv)
        return rd_exec_cmd(rd, cmds, "object");
 }
 
-static int rd_batch(struct rd *rd, const char *name, bool force)
+static int rd_batch_cmd(int argc, char *argv[], void *data)
 {
-       char *line = NULL;
-       size_t len = 0;
-       int ret = 0;
-
-       if (name && strcmp(name, "-") != 0) {
-               if (!freopen(name, "r", stdin)) {
-                       pr_err("Cannot open file \"%s\" for reading: %s\n",
-                              name, strerror(errno));
-                       return errno;
-               }
-       }
+       struct rd *rd = data;
 
-       cmdlineno = 0;
-       while (getcmdline(&line, &len, stdin) != -1) {
-               char *largv[512];
-               int largc;
-
-               largc = makeargs(line, largv, ARRAY_SIZE(largv));
-               if (!largc)
-                       continue;       /* blank line */
-
-               ret = rd_cmd(rd, largc, largv);
-               if (ret) {
-                       pr_err("Command failed %s:%d\n", name, cmdlineno);
-                       if (!force)
-                               break;
-               }
-       }
-
-       free(line);
+       return rd_cmd(rd, argc, argv);
+}
 
-       return ret;
+static int rd_batch(struct rd *rd, const char *name, bool force)
+{
+       return do_batch(name, force, rd_batch_cmd, rd);
 }
 
 static int rd_init(struct rd *rd, char *filename)
diff --git a/tc/tc.c b/tc/tc.c
index 5d57054b45fb..01fe58d06202 100644
--- a/tc/tc.c
+++ b/tc/tc.c
@@ -231,22 +231,16 @@ static int do_cmd(int argc, char **argv)
        return -1;
 }
 
+static int tc_batch_cmd(int argc, char *argv[], void *data)
+{
+       return do_cmd(argc, argv);
+}
+
 static int batch(const char *name)
 {
-       char *line = NULL;
-       size_t len = 0;
-       int ret = 0;
+       int ret;
 
        batch_mode = 1;
-       if (name && strcmp(name, "-") != 0) {
-               if (freopen(name, "r", stdin) == NULL) {
-                       fprintf(stderr,
-                               "Cannot open file \"%s\" for reading: %s\n",
-                               name, strerror(errno));
-                       return -1;
-               }
-       }
-
        tc_core_init();
 
        if (rtnl_open(&rth, 0) < 0) {
@@ -254,26 +248,8 @@ static int batch(const char *name)
                return -1;
        }
 
-       cmdlineno = 0;
-       while (getcmdline(&line, &len, stdin) != -1) {
-               char *largv[100];
-               int largc;
-
-               largc = makeargs(line, largv, 100);
-               if (largc == 0)
-                       continue;       /* blank line */
-
-               if (do_cmd(largc, largv)) {
-                       fprintf(stderr, "Command failed %s:%d\n",
-                               name, cmdlineno);
-                       ret = 1;
-                       if (!force)
-                               break;
-               }
-               fflush(stdout);
-       }
+       ret = do_batch(name, force, tc_batch_cmd, NULL);
 
-       free(line);
        rtnl_close(&rth);
        return ret;
 }
-- 
2.25.1

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