X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=blobdiff_plain;f=src%2Fsysctl%2Fsysctl.c;h=809e59b71fdb6acd8a184e2f52a5fca7d2c092ce;hb=74a550c5d8228e58b936dd70e183f633bf373632;hp=b5670dbb8659292871bd6d49d68930f6651fe897;hpb=04bf3c1a60d82791e0320381e9268f727708f776;p=elogind.git

diff --git a/src/sysctl/sysctl.c b/src/sysctl/sysctl.c
index b5670dbb8..809e59b71 100644
--- a/src/sysctl/sysctl.c
+++ b/src/sysctl/sysctl.c
@@ -30,11 +30,11 @@
 #include "log.h"
 #include "strv.h"
 #include "util.h"
-#include "strv.h"
 #include "hashmap.h"
 #include "path-util.h"
 #include "conf-files.h"
 #include "fileio.h"
+#include "build.h"
 
 static char **arg_prefixes = NULL;
 
@@ -48,12 +48,26 @@ static const char conf_file_dirs[] =
 #endif
         ;
 
-static char *normalize_sysctl(char *s) {
+static char* normalize_sysctl(char *s) {
         char *n;
 
-        for (n = s; *n; n++)
+        n = strpbrk(s, "/.");
+        /* If the first separator is a slash, the path is
+         * assumed to be normalized and slashes remain slashes
+         * and dots remains dots. */
+        if (!n || *n == '/')
+                return s;
+
+        /* Otherwise, dots become slashes and slashes become
+         * dots. Fun. */
+        while (n) {
                 if (*n == '.')
                         *n = '/';
+                else
+                        *n = '.';
+
+                n = strpbrk(n + 1, "/.");
+        }
 
         return s;
 }
@@ -65,7 +79,7 @@ static int apply_sysctl(const char *property, const char *value) {
 
         log_debug("Setting '%s' to '%s'", property, value);
 
-        p = new(char, sizeof("/proc/sys/") + strlen(property));
+        p = new(char, strlen("/proc/sys/") + strlen(property) + 1);
         if (!p)
                 return log_oom();
 
@@ -123,7 +137,7 @@ static int parse_file(Hashmap *sysctl_options, const char *path, bool ignore_eno
 
         assert(path);
 
-        r = search_and_fopen_nulstr(path, "re", conf_file_dirs, &f);
+        r = search_and_fopen_nulstr(path, "re", NULL, conf_file_dirs, &f);
         if (r < 0) {
                 if (ignore_enoent && r == -ENOENT)
                         return 0;
@@ -132,7 +146,7 @@ static int parse_file(Hashmap *sysctl_options, const char *path, bool ignore_eno
                 return r;
         }
 
-        log_debug("parse: %s\n", path);
+        log_debug("parse: %s", path);
         while (!feof(f)) {
                 char l[LINE_MAX], *p, *value, *new_value, *property, *existing;
                 void *v;
@@ -200,27 +214,27 @@ static int parse_file(Hashmap *sysctl_options, const char *path, bool ignore_eno
         return r;
 }
 
-static int help(void) {
-
+static void help(void) {
         printf("%s [OPTIONS...] [CONFIGURATION FILE...]\n\n"
                "Applies kernel sysctl settings.\n\n"
                "  -h --help             Show this help\n"
-               "     --prefix=PATH      Only apply rules that apply to paths with the specified prefix\n",
-               program_invocation_short_name);
-
-        return 0;
+               "     --version          Show package version\n"
+               "     --prefix=PATH      Only apply rules with the specified prefix\n"
+               , program_invocation_short_name);
 }
 
 static int parse_argv(int argc, char *argv[]) {
 
         enum {
+                ARG_VERSION = 0x100,
                 ARG_PREFIX
         };
 
         static const struct option options[] = {
                 { "help",      no_argument,       NULL, 'h'           },
+                { "version",   no_argument,       NULL, ARG_VERSION   },
                 { "prefix",    required_argument, NULL, ARG_PREFIX    },
-                { NULL,        0,                 NULL, 0             }
+                {}
         };
 
         int c;
@@ -228,7 +242,7 @@ static int parse_argv(int argc, char *argv[]) {
         assert(argc >= 0);
         assert(argv);
 
-        while ((c = getopt_long(argc, argv, "h", options, NULL)) >= 0) {
+        while ((c = getopt_long(argc, argv, "h", options, NULL)) >= 0)
 
                 switch (c) {
 
@@ -236,20 +250,28 @@ static int parse_argv(int argc, char *argv[]) {
                         help();
                         return 0;
 
+                case ARG_VERSION:
+                        puts(PACKAGE_STRING);
+                        puts(SYSTEMD_FEATURES);
+                        return 0;
+
                 case ARG_PREFIX: {
                         char *p;
-                        char **l;
-
-                        for (p = optarg; *p; p++)
-                                if (*p == '.')
-                                        *p = '/';
 
-                        l = strv_append(arg_prefixes, optarg);
-                        if (!l)
+                        /* We used to require people to specify absolute paths
+                         * in /proc/sys in the past. This is kinda useless, but
+                         * we need to keep compatibility. We now support any
+                         * sysctl name available. */
+                        normalize_sysctl(optarg);
+                        if (startswith(optarg, "/proc/sys"))
+                                p = strdup(optarg);
+                        else
+                                p = strappend("/proc/sys/", optarg);
+
+                        if (!p)
+                                return log_oom();
+                        if (strv_consume(&arg_prefixes, p) < 0)
                                 return log_oom();
-
-                        strv_free(arg_prefixes);
-                        arg_prefixes = l;
 
                         break;
                 }
@@ -258,10 +280,8 @@ static int parse_argv(int argc, char *argv[]) {
                         return -EINVAL;
 
                 default:
-                        log_error("Unknown option code %c", c);
-                        return -EINVAL;
+                        assert_not_reached("Unhandled option");
                 }
-        }
 
         return 1;
 }
@@ -280,7 +300,7 @@ int main(int argc, char *argv[]) {
 
         umask(0022);
 
-        sysctl_options = hashmap_new(string_hash_func, string_compare_func);
+        sysctl_options = hashmap_new(&string_hash_ops);
         if (!sysctl_options) {
                 r = log_oom();
                 goto finish;