X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=blobdiff_plain;ds=sidebyside;f=src%2Fshared%2Futil.c;h=85a570a2a45f5912187663f323f9e2d9bd368c00;hb=fdbdf6ec29bda40763d7d3e7bb2a63e2f5d60c4c;hp=3d16cd1a13a5c52d4a30d955a5235adcefe8c3c7;hpb=58d617429dcfb6fb1ea0f7b6cbce82266ccbb1aa;p=elogind.git

diff --git a/src/shared/util.c b/src/shared/util.c
index 3d16cd1a1..85a570a2a 100644
--- a/src/shared/util.c
+++ b/src/shared/util.c
@@ -2084,12 +2084,14 @@ fail:
 }
 
 int release_terminal(void) {
-        int r = 0;
-        struct sigaction sa_old, sa_new = {
+        static const struct sigaction sa_new = {
                 .sa_handler = SIG_IGN,
                 .sa_flags = SA_RESTART,
         };
-        _cleanup_close_ int fd;
+
+        _cleanup_close_ int fd = -1;
+        struct sigaction sa_old;
+        int r = 0;
 
         fd = open("/dev/tty", O_RDWR|O_NOCTTY|O_NDELAY|O_CLOEXEC);
         if (fd < 0)
@@ -3940,7 +3942,6 @@ void execute_directory(const char *directory, DIR *d, usec_t timeout, char *argv
                                 _exit(EXIT_FAILURE);
                         }
 
-
                         log_debug("Spawned %s as " PID_FMT ".", path, pid);
 
                         r = hashmap_put(pids, UINT_TO_PTR(pid), path);
@@ -6868,11 +6869,13 @@ char *tempfn_random(const char *p) {
 bool is_localhost(const char *hostname) {
         assert(hostname);
 
-        /* This tries to identify local hostnames described in RFC6761
-         * plus the redhatism of .localdomain */
+        /* This tries to identify local host and domain names
+         * described in RFC6761 plus the redhatism of .localdomain */
 
         return streq(hostname, "localhost") ||
                streq(hostname, "localhost.") ||
+               streq(hostname, "localdomain.") ||
+               streq(hostname, "localdomain") ||
                endswith(hostname, ".localhost") ||
                endswith(hostname, ".localhost.") ||
                endswith(hostname, ".localdomain") ||
@@ -6918,3 +6921,220 @@ int take_password_lock(const char *root) {
 
         return fd;
 }
+
+int is_symlink(const char *path) {
+        struct stat info;
+
+        if (lstat(path, &info) < 0)
+                return -errno;
+
+        if (S_ISLNK(info.st_mode))
+                return 1;
+
+        return 0;
+}
+
+int unquote_first_word(const char **p, char **ret) {
+        _cleanup_free_ char *s = NULL;
+        size_t allocated = 0, sz = 0;
+
+        enum {
+                START,
+                VALUE,
+                VALUE_ESCAPE,
+                SINGLE_QUOTE,
+                SINGLE_QUOTE_ESCAPE,
+                DOUBLE_QUOTE,
+                DOUBLE_QUOTE_ESCAPE,
+                SPACE,
+        } state = START;
+
+        assert(p);
+        assert(*p);
+        assert(ret);
+
+        /* Parses the first word of a string, and returns it in
+         * *ret. Removes all quotes in the process. When parsing fails
+         * (because of an uneven number of quotes or similar), leaves
+         * the pointer *p at the first invalid character. */
+
+        for (;;) {
+                char c = **p;
+
+                switch (state) {
+
+                case START:
+                        if (c == 0)
+                                goto finish;
+                        else if (strchr(WHITESPACE, c))
+                                break;
+
+                        state = VALUE;
+                        /* fallthrough */
+
+                case VALUE:
+                        if (c == 0)
+                                goto finish;
+                        else if (c == '\'')
+                                state = SINGLE_QUOTE;
+                        else if (c == '\\')
+                                state = VALUE_ESCAPE;
+                        else if (c == '\"')
+                                state = DOUBLE_QUOTE;
+                        else if (strchr(WHITESPACE, c))
+                                state = SPACE;
+                        else {
+                                if (!GREEDY_REALLOC(s, allocated, sz+2))
+                                        return -ENOMEM;
+
+                                s[sz++] = c;
+                        }
+
+                        break;
+
+                case VALUE_ESCAPE:
+                        if (c == 0)
+                                return -EINVAL;
+
+                        if (!GREEDY_REALLOC(s, allocated, sz+2))
+                                return -ENOMEM;
+
+                        s[sz++] = c;
+                        state = VALUE;
+
+                        break;
+
+                case SINGLE_QUOTE:
+                        if (c == 0)
+                                return -EINVAL;
+                        else if (c == '\'')
+                                state = VALUE;
+                        else if (c == '\\')
+                                state = SINGLE_QUOTE_ESCAPE;
+                        else {
+                                if (!GREEDY_REALLOC(s, allocated, sz+2))
+                                        return -ENOMEM;
+
+                                s[sz++] = c;
+                        }
+
+                        break;
+
+                case SINGLE_QUOTE_ESCAPE:
+                        if (c == 0)
+                                return -EINVAL;
+
+                        if (!GREEDY_REALLOC(s, allocated, sz+2))
+                                return -ENOMEM;
+
+                        s[sz++] = c;
+                        state = SINGLE_QUOTE;
+                        break;
+
+                case DOUBLE_QUOTE:
+                        if (c == 0)
+                                return -EINVAL;
+                        else if (c == '\"')
+                                state = VALUE;
+                        else if (c == '\\')
+                                state = DOUBLE_QUOTE_ESCAPE;
+                        else {
+                                if (!GREEDY_REALLOC(s, allocated, sz+2))
+                                        return -ENOMEM;
+
+                                s[sz++] = c;
+                        }
+
+                        break;
+
+                case DOUBLE_QUOTE_ESCAPE:
+                        if (c == 0)
+                                return -EINVAL;
+
+                        if (!GREEDY_REALLOC(s, allocated, sz+2))
+                                return -ENOMEM;
+
+                        s[sz++] = c;
+                        state = DOUBLE_QUOTE;
+                        break;
+
+                case SPACE:
+                        if (c == 0)
+                                goto finish;
+                        if (!strchr(WHITESPACE, c))
+                                goto finish;
+
+                        break;
+                }
+
+                (*p) ++;
+        }
+
+finish:
+        if (!s) {
+                *ret = NULL;
+                return 0;
+        }
+
+        s[sz] = 0;
+        *ret = s;
+        s = NULL;
+
+        return 1;
+}
+
+int unquote_many_words(const char **p, ...) {
+        va_list ap;
+        char **l;
+        int n = 0, i, c, r;
+
+        /* Parses a number of words from a string, stripping any
+         * quotes if necessary. */
+
+        assert(p);
+
+        /* Count how many words are expected */
+        va_start(ap, p);
+        for (;;) {
+                if (!va_arg(ap, char **))
+                        break;
+                n++;
+        }
+        va_end(ap);
+
+        if (n <= 0)
+                return 0;
+
+        /* Read all words into a temporary array */
+        l = newa0(char*, n);
+        for (c = 0; c < n; c++) {
+
+                r = unquote_first_word(p, &l[c]);
+                if (r < 0) {
+                        int j;
+
+                        for (j = 0; j < c; j++) {
+                                free(l[j]);
+                                return r;
+                        }
+                }
+
+                if (r == 0)
+                        break;
+        }
+
+        /* If we managed to parse all words, return them in the passed
+         * in parameters */
+        va_start(ap, p);
+        for (i = 0; i < n; i++) {
+                char **v;
+
+                v = va_arg(ap, char **);
+                assert(v);
+
+                *v = l[i];
+        }
+        va_end(ap);
+
+        return c;
+}