Merge preprocessing of command lines

 - Common function for splitting string into argument vector
 - Preprocess & split command lines while parsing the service file
 - Specify "before" and "after" dependencies in a single line

Signed-off-by: David Oberhollenzer <david.oberhollenzer@tele2.at>

1 files changed, 73 insertions, 0 deletions

diff --git a/lib/src/splitkv.c b/lib/src/splitkv.c
index 3631ea8..7d652d3 100644
--- a/lib/src/splitkv.c
+++ b/lib/src/splitkv.c
@@ -15,7 +15,9 @@
  * You should have received a copy of the GNU General Public License
  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
  */
+#include <stdlib.h>
 #include <ctype.h>
+#include <errno.h>
 
 #include "util.h"
 
@@ -86,3 +88,74 @@ int unescape(char *src)
 	*(dst++) = '\0';
 	return 0;
 }
+
+char **split_argv(char *str)
+{
+	size_t i = 0, cap = 0, new_cap;
+	char **argv = NULL, **new;
+	char *ptr;
+
+	ptr = str;
+
+	for (;;) {
+		if (*ptr == ' ') {
+			++ptr;
+			continue;
+		}
+
+		if (i == cap) {
+			new_cap = cap ? cap * 2 : 16;
+			new = realloc(argv, sizeof(argv[0]) * new_cap);
+
+			if (new == NULL) {
+				free(argv);
+				errno = ENOMEM;
+				return NULL;
+			}
+
+			cap = new_cap;
+			argv = new;
+		}
+
+		if (*ptr == '\0') {
+			argv[i++] = NULL;
+			break;
+		}
+
+		argv[i++] = ptr;
+
+		if (*ptr == '"') {
+			++ptr;
+			while (*ptr != '\0' && *ptr != '"') {
+				if (ptr[0] == '\\' && ptr[1] != '\0')
+					++ptr;
+
+				++ptr;
+			}
+
+			if (*ptr == '"')
+				++ptr;
+
+			if (*ptr == ' ') {
+				*(ptr++) = '\0';
+			} else if (*ptr != '\0') {
+				goto fail_str;
+			}
+
+			if (unescape(argv[i - 1]))
+				goto fail_str;
+		} else {
+			while (*ptr != '\0' && *ptr != ' ')
+				++ptr;
+
+			if (*ptr == ' ')
+				*(ptr++) = '\0';
+		}
+	}
+
+	return argv;
+fail_str:
+	free(argv);
+	errno = EINVAL;
+	return NULL;
+}