4 files changed, 40 insertions, 10 deletions
diff --git a/src/basic/fileio.c b/src/basic/fileio.c
index f183de4999..588eacd77c 100644
--- a/src/basic/fileio.c
+++ b/src/basic/fileio.c
@@ -47,6 +47,8 @@
 #include "umask-util.h"
 #include "utf8.h"
 
+#define READ_FULL_BYTES_MAX (4U*1024U*1024U)
+
 int write_string_stream(FILE *f, const char *line, bool enforce_newline) {
 
         assert(f);
@@ -230,7 +232,7 @@ int read_full_stream(FILE *f, char **contents, size_t *size) {
         if (S_ISREG(st.st_mode)) {
 
                 /* Safety check */
-                if (st.st_size > 4*1024*1024)
+                if (st.st_size > READ_FULL_BYTES_MAX)
                         return -E2BIG;
 
                 /* Start with the right file size, but be prepared for
@@ -245,26 +247,31 @@ int read_full_stream(FILE *f, char **contents, size_t *size) {
                 char *t;
                 size_t k;
 
-                t = realloc(buf, n+1);
+                t = realloc(buf, n + 1);
                 if (!t)
                         return -ENOMEM;
 
                 buf = t;
                 k = fread(buf + l, 1, n - l, f);
+                if (k > 0)
+                        l += k;
 
-                if (k <= 0) {
-                        if (ferror(f))
-                                return -errno;
+                if (ferror(f))
+                        return -errno;
 
+                if (feof(f))
                         break;
-                }
 
-                l += k;
-                n *= 2;
+                /* We aren't expecting fread() to return a short read outside
+                 * of (error && eof), assert buffer is full and enlarge buffer.
+                 */
+                assert(l == n);
 
                 /* Safety check */
-                if (n > 4*1024*1024)
+                if (n >= READ_FULL_BYTES_MAX)
                         return -E2BIG;
+
+                n = MIN(n * 2, READ_FULL_BYTES_MAX);
         }
 
         buf[l] = 0;
diff --git a/src/basic/parse-util.c b/src/basic/parse-util.c
index 11849ade0b..c98815b9bc 100644
--- a/src/basic/parse-util.c
+++ b/src/basic/parse-util.c
@@ -29,6 +29,7 @@
 #include "extract-word.h"
 #include "macro.h"
 #include "parse-util.h"
+#include "process-util.h"
 #include "string-util.h"
 
 int parse_boolean(const char *v) {
@@ -551,10 +552,25 @@ int parse_percent_unbounded(const char *p) {
 }
 
 int parse_percent(const char *p) {
-        int v = parse_percent_unbounded(p);
+        int v;
 
+        v = parse_percent_unbounded(p);
         if (v > 100)
                 return -ERANGE;
 
         return v;
 }
+
+int parse_nice(const char *p, int *ret) {
+        int n, r;
+
+        r = safe_atoi(p, &n);
+        if (r < 0)
+                return r;
+
+        if (!nice_is_valid(n))
+                return -ERANGE;
+
+        *ret = n;
+        return 0;
+}
diff --git a/src/basic/parse-util.h b/src/basic/parse-util.h
index f0fa5f9752..461e1cd4d8 100644
--- a/src/basic/parse-util.h
+++ b/src/basic/parse-util.h
@@ -108,3 +108,5 @@ int parse_fractional_part_u(const char **s, size_t digits, unsigned *res);
 
 int parse_percent_unbounded(const char *p);
 int parse_percent(const char *p);
+
+int parse_nice(const char *p, int *ret);
diff --git a/src/basic/process-util.h b/src/basic/process-util.h
index 9f75088796..2568e3834f 100644
--- a/src/basic/process-util.h
+++ b/src/basic/process-util.h
@@ -26,6 +26,7 @@
 #include <stdio.h>
 #include <string.h>
 #include <sys/types.h>
+#include <sys/resource.h>
 
 #include "formats-util.h"
 #include "macro.h"
@@ -103,3 +104,7 @@ int sched_policy_from_string(const char *s);
 void valgrind_summary_hack(void);
 
 int pid_compare_func(const void *a, const void *b);
+
+static inline bool nice_is_valid(int n) {
+        return n >= PRIO_MIN && n < PRIO_MAX;
+}