Rename util/ to libutil/

2014-11-17 16:48:01 +00:00
parent ee1e90ebdc
commit 027052f5e5
26 changed files with 26 additions and 26 deletions
--- a/libutil/mode.c
+++ b/libutil/mode.c
@@ -0,0 +1,163 @@
+#include <stdlib.h>
+#include <string.h>
+#include <sys/stat.h>
+#include <unistd.h>
+
+#include "../util.h"
+
+mode_t
+getumask(void)
+{
+	mode_t mask = umask(0);
+	umask(mask);
+	return mask;
+}
+
+mode_t
+parsemode(const char *str, mode_t mode, mode_t mask)
+{
+	char *end;
+	const char *p = str;
+	int octal, op;
+	mode_t who, perm, clear;
+
+	octal = strtol(str, &end, 8);
+	if (*end == '\0') {
+		if (octal < 0 || octal > 07777) {
+			eprintf("%s: invalid mode\n", str);
+			return -1;
+		}
+		mode = 0;
+		if (octal & 04000) mode |= S_ISUID;
+		if (octal & 02000) mode |= S_ISGID;
+		if (octal & 01000) mode |= S_ISVTX;
+		if (octal & 00400) mode |= S_IRUSR;
+		if (octal & 00200) mode |= S_IWUSR;
+		if (octal & 00100) mode |= S_IXUSR;
+		if (octal & 00040) mode |= S_IRGRP;
+		if (octal & 00020) mode |= S_IWGRP;
+		if (octal & 00010) mode |= S_IXGRP;
+		if (octal & 00004) mode |= S_IROTH;
+		if (octal & 00002) mode |= S_IWOTH;
+		if (octal & 00001) mode |= S_IXOTH;
+		return mode;
+	}
+next:
+	/* first, determine which bits we will be modifying */
+	for (who = 0; *p; p++) {
+		switch (*p) {
+		/* masks */
+		case 'u':
+			who |= S_IRWXU|S_ISUID;
+			continue;
+		case 'g':
+			who |= S_IRWXG|S_ISGID;
+			continue;
+		case 'o':
+			who |= S_IRWXO;
+			continue;
+		case 'a':
+			who |= S_IRWXU|S_ISUID|S_IRWXG|S_ISGID|S_IRWXO;
+			continue;
+		}
+		break;
+	}
+	if (who) {
+		clear = who;
+	} else {
+		clear = S_ISUID|S_ISGID|S_ISVTX|S_IRWXU|S_IRWXG|S_IRWXO;
+		who = ~mask;
+	}
+	while (*p) {
+		switch (*p) {
+		/* opers */
+		case '=':
+		case '+':
+		case '-':
+			op = (int)*p;
+			break;
+		default:
+			eprintf("%s: invalid mode\n", str);
+			return -1;
+		}
+
+		perm = 0;
+		switch (*++p) {
+		/* copy */
+		case 'u':
+			if (mode & S_IRUSR)
+				perm |= S_IRUSR|S_IRGRP|S_IROTH;
+			if (mode & S_IWUSR)
+				perm |= S_IWUSR|S_IWGRP|S_IWOTH;
+			if (mode & S_IXUSR)
+				perm |= S_IXUSR|S_IXGRP|S_IXOTH;
+			if (mode & S_ISUID)
+				perm |= S_ISUID|S_ISGID;
+			p++;
+			break;
+		case 'g':
+			if (mode & S_IRGRP)
+				perm |= S_IRUSR|S_IRGRP|S_IROTH;
+			if (mode & S_IWGRP)
+				perm |= S_IWUSR|S_IWGRP|S_IWOTH;
+			if (mode & S_IXGRP)
+				perm |= S_IXUSR|S_IXGRP|S_IXOTH;
+			if (mode & S_ISGID)
+				perm |= S_ISUID|S_ISGID;
+			p++;
+			break;
+		case 'o':
+			if (mode & S_IROTH)
+				perm |= S_IRUSR|S_IRGRP|S_IROTH;
+			if (mode & S_IWOTH)
+				perm |= S_IWUSR|S_IWGRP|S_IWOTH;
+			if (mode & S_IXOTH)
+				perm |= S_IXUSR|S_IXGRP|S_IXOTH;
+			p++;
+			break;
+		default:
+			for (; *p; p++) {
+				switch (*p) {
+				/* modes */
+				case 'r':
+					perm |= S_IRUSR|S_IRGRP|S_IROTH;
+					break;
+				case 'w':
+					perm |= S_IWUSR|S_IWGRP|S_IWOTH;
+					break;
+				case 'x':
+					perm |= S_IXUSR|S_IXGRP|S_IXOTH;
+					break;
+				case 's':
+					perm |= S_ISUID|S_ISGID;
+					break;
+				case 't':
+					perm |= S_ISVTX;
+					break;
+				default:
+					goto apply;
+				}
+			}
+		}
+
+	apply:
+		/* apply */
+		switch (op) {
+		case '=':
+			mode &= ~clear;
+			/* fallthrough */
+		case '+':
+			mode |= perm & who;
+			break;
+		case '-':
+			mode &= ~(perm & who);
+			break;
+		}
+		/* if we hit a comma, move on to the next clause */
+		if (*p == ',') {
+			p++;
+			goto next;
+		}
+	}
+	return mode;
+}