core/load-fragment: be more precise in error messages

Whenever a message fails, mention the offending word, instead
of just giving the whole line. If one bad word causes just this
word to be rejected, print only the word. If one bad word causes
the whole line to be rejected, print the whole line too.

https://bugs.freedesktop.org/show_bug.cgi?id=56874

1 files changed, 31 insertions, 38 deletions

diff --git a/src/core/load-fragment.c b/src/core/load-fragment.c
index 6759255984..01f94844a6 100644
--- a/src/core/load-fragment.c
+++ b/src/core/load-fragment.c
@@ -86,7 +86,7 @@ int config_parse_unit_deps(
         assert(rvalue);
 
         FOREACH_WORD_QUOTED(w, l, rvalue, state) {
-                char *t, *k;
+                char _cleanup_free_ *t = NULL, *k = NULL;
                 int r;
 
                 t = strndup(w, l);
@@ -94,15 +94,13 @@ int config_parse_unit_deps(
                         return -ENOMEM;
 
                 k = unit_name_printf(u, t);
-                free(t);
                 if (!k)
                         return -ENOMEM;
 
                 r = unit_add_dependency_by_name(u, d, k, NULL, true);
                 if (r < 0)
-                        log_error("[%s:%u] Failed to add dependency on %s, ignoring: %s", filename, line, k, strerror(-r));
-
-                free(k);
+                        log_error("[%s:%u] Failed to add dependency on %s, ignoring: %s",
+                                  filename, line, k, strerror(-r));
         }
 
         return 0;
@@ -757,22 +755,25 @@ int config_parse_exec_cpu_affinity(
         assert(data);
 
         FOREACH_WORD_QUOTED(w, l, rvalue, state) {
-                char *t;
+                char _cleanup_free_ *t = NULL;
                 int r;
                 unsigned cpu;
 
-                if (!(t = strndup(w, l)))
+                t = strndup(w, l);
+                if (!t)
                         return -ENOMEM;
 
                 r = safe_atou(t, &cpu);
-                free(t);
 
-                if (!(c->cpuset))
-                        if (!(c->cpuset = cpu_set_malloc(&c->cpuset_ncpus)))
+                if (!c->cpuset) {
+                        c->cpuset = cpu_set_malloc(&c->cpuset_ncpus);
+                        if (!c->cpuset)
                                 return -ENOMEM;
+                }
 
                 if (r < 0 || cpu >= c->cpuset_ncpus) {
-                        log_error("[%s:%u] Failed to parse CPU affinity, ignoring: %s", filename, line, rvalue);
+                        log_error("[%s:%u] Failed to parse CPU affinity %s, ignoring: %s",
+                                  filename, line, t, rvalue);
                         return 0;
                 }
 
@@ -849,7 +850,8 @@ int config_parse_exec_secure_bits(
                 else if (first_word(w, "noroot-locked"))
                         c->secure_bits |= SECURE_NOROOT_LOCKED;
                 else {
-                        log_error("[%s:%u] Failed to parse secure bits, ignoring: %s", filename, line, rvalue);
+                        log_error("[%s:%u] Failed to parse secure bits, ignoring: %s",
+                                  filename, line, rvalue);
                         return 0;
                 }
         }
@@ -890,7 +892,7 @@ int config_parse_bounding_set(
          * interface. */
 
         FOREACH_WORD_QUOTED(w, l, rvalue, state) {
-                char *t;
+                char _cleanup_free_ *t = NULL;
                 int r;
                 cap_value_t cap;
 
@@ -899,10 +901,9 @@ int config_parse_bounding_set(
                         return -ENOMEM;
 
                 r = cap_from_name(t, &cap);
-                free(t);
-
                 if (r < 0) {
-                        log_error("[%s:%u] Failed to parse capability bounding set, ignoring: %s", filename, line, rvalue);
+                        log_error("[%s:%u] Failed to parse capability in bounding set, ignoring: %s",
+                                  filename, line, t);
                         continue;
                 }
 
@@ -968,7 +969,7 @@ int config_parse_unit_cgroup(
         char *state;
 
         FOREACH_WORD_QUOTED(w, l, rvalue, state) {
-                char *t, *k;
+                char _cleanup_free_ *t = NULL, *k = NULL, *ku = NULL;
                 int r;
 
                 t = strndup(w, l);
@@ -976,22 +977,17 @@ int config_parse_unit_cgroup(
                         return -ENOMEM;
 
                 k = unit_full_printf(u, t);
-                free(t);
-
                 if (!k)
                         return -ENOMEM;
 
-                t = cunescape(k);
-                free(k);
-
-                if (!t)
+                ku = cunescape(k);
+                if (!ku)
                         return -ENOMEM;
 
-                r = unit_add_cgroup_from_text(u, t);
-                free(t);
-
+                r = unit_add_cgroup_from_text(u, ku);
                 if (r < 0) {
-                        log_error("[%s:%u] Failed to parse cgroup value, ignoring: %s", filename, line, rvalue);
+                        log_error("[%s:%u] Failed to parse cgroup value %s, ignoring: %s",
+                                  filename, line, k, rvalue);
                         return 0;
                 }
         }
@@ -1351,33 +1347,30 @@ int config_parse_service_sockets(
         assert(data);
 
         FOREACH_WORD_QUOTED(w, l, rvalue, state) {
-                char *t, *k;
+                char _cleanup_free_ *t = NULL, *k = NULL;
 
                 t = strndup(w, l);
                 if (!t)
                         return -ENOMEM;
 
                 k = unit_name_printf(UNIT(s), t);
-                free(t);
-
                 if (!k)
                         return -ENOMEM;
 
                 if (!endswith(k, ".socket")) {
-                        log_error("[%s:%u] Unit must be of type socket, ignoring: %s", filename, line, rvalue);
-                        free(k);
+                        log_error("[%s:%u] Unit must be of type socket, ignoring: %s",
+                                  filename, line, k);
                         continue;
                 }
 
                 r = unit_add_two_dependencies_by_name(UNIT(s), UNIT_WANTS, UNIT_AFTER, k, NULL, true);
                 if (r < 0)
-                        log_error("[%s:%u] Failed to add dependency on %s, ignoring: %s", filename, line, k, strerror(-r));
+                        log_error("[%s:%u] Failed to add dependency on %s, ignoring: %s",
+                                  filename, line, k, strerror(-r));
 
                 r = unit_add_dependency_by_name(UNIT(s), UNIT_TRIGGERED_BY, k, NULL, true);
                 if (r < 0)
                         return r;
-
-                free(k);
         }
 
         return 0;
@@ -2105,17 +2098,17 @@ int config_parse_syscall_filter(
 
         FOREACH_WORD_QUOTED(w, l, rvalue, state) {
                 int id;
-                char *t;
+                char _cleanup_free_ *t = NULL;
 
                 t = strndup(w, l);
                 if (!t)
                         return -ENOMEM;
 
                 id = syscall_from_name(t);
-                free(t);
 
                 if (id < 0)  {
-                        log_error("[%s:%u] Failed to parse syscall, ignoring: %s", filename, line, rvalue);
+                        log_error("[%s:%u] Failed to parse syscall, ignoring: %s",
+                                  filename, line, t);
                         continue;
                 }