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authorErik Andersen2000-03-06 19:20:35 +0000
committerErik Andersen2000-03-06 19:20:35 +0000
commite916d24805b4a191bc08d2ee31c9247a30f9bc1e (patch)
treeac14b799b56d16ae84ff3960f59dc3ede01bc0a1 /editors
parent9c5c29d442d588ffce390e18fc554f258f6d523e (diff)
downloadbusybox-e916d24805b4a191bc08d2ee31c9247a30f9bc1e.zip
busybox-e916d24805b4a191bc08d2ee31c9247a30f9bc1e.tar.gz
Fixed a bug where "sed 's/foo/bar/g'" (i.e. a script w/o a -e)
would go into an infinite loop. -Erik
Diffstat (limited to 'editors')
-rw-r--r--editors/sed.c246
1 files changed, 123 insertions, 123 deletions
diff --git a/editors/sed.c b/editors/sed.c
index 608f868..2beb2a5 100644
--- a/editors/sed.c
+++ b/editors/sed.c
@@ -184,129 +184,129 @@ extern int sed_main(int argc, char **argv)
}
while (argc > 1) {
- if (**argv == '-') {
- argc--;
- cp = *argv++;
- stopNow = FALSE;
-
- while (*++cp && stopNow == FALSE) {
- switch (*cp) {
- case 'n':
- quietFlag = TRUE;
- break;
- case 'e':
- if (*(cp + 1) == 0 && --argc < 0) {
- usage(sed_usage);
- }
- if (*++cp != 's')
- cp = *argv++;
-
- /* Read address if present */
- SKIPSPACES(cp);
- if (*cp == '$') {
- addr_line = LAST_LINE;
- cp++;
- } else {
- if (isdigit(*cp)) { /* LINE ADDRESS */
- line_s = cp;
- while (isdigit(*cp))
- cp++;
- if (cp > line_s) {
- /* numeric line */
- saved = *cp;
- *cp = '\0';
- addr_line = atoi(line_s);
- *cp = saved;
- }
- } else if (*cp == '/') { /* PATTERN ADDRESS */
- pos = addr_pattern = cp + 1;
- pos = strchr(pos, '/');
- if (!pos)
- usage(sed_usage);
- *pos = '\0';
- cp = pos + 1;
- }
- }
-
- SKIPSPACES(cp);
- if (*cp == '!') {
- negated++;
- cp++;
- }
-
- /* Read command */
-
- SKIPSPACES(cp);
- switch (*cp) {
- case 's': /* REPLACE */
- if (strlen(cp) <= 3 || *(cp + 1) != '/')
- break;
- sed_f = f_replace;
-
- pos = needle = cp + 2;
-
- for (;;) {
- pos = strchr(pos, '/');
- if (pos == NULL) {
- usage(sed_usage);
- }
- if (*(pos - 1) == '\\') {
- pos++;
- continue;
- }
- break;
- }
- *pos = 0;
- newNeedle = ++pos;
- for (;;) {
- pos = strchr(pos, '/');
- if (pos == NULL) {
- usage(sed_usage);
- }
- if (*(pos - 1) == '\\') {
- pos++;
- continue;
- }
- break;
- }
- *pos = 0;
- if (pos + 2 != 0) {
- while (*++pos) {
- switch (*pos) {
- case 'i':
- ignoreCase = TRUE;
- break;
- case 'p':
- printFlag = TRUE;
- break;
- case 'g':
- break;
- default:
- usage(sed_usage);
- }
- }
- }
- cp = pos;
- /* fprintf(stderr, "replace '%s' with '%s'\n", needle, newNeedle); */
- break;
-
- case 'a': /* APPEND */
- if (strlen(cp) < 2)
- break;
- sed_f = f_append;
- appendline = ++cp;
- /* fprintf(stderr, "append '%s'\n", appendline); */
- break;
- }
-
- stopNow = TRUE;
- break;
-
- default:
- usage(sed_usage);
- }
- }
- }
+ if (**argv != '-')
+ usage(sed_usage);
+ argc--;
+ cp = *argv++;
+ stopNow = FALSE;
+
+ while (*++cp && stopNow == FALSE) {
+ switch (*cp) {
+ case 'n':
+ quietFlag = TRUE;
+ break;
+ case 'e':
+ if (*(cp + 1) == 0 && --argc < 0) {
+ usage(sed_usage);
+ }
+ if (*++cp != 's')
+ cp = *argv++;
+
+ /* Read address if present */
+ SKIPSPACES(cp);
+ if (*cp == '$') {
+ addr_line = LAST_LINE;
+ cp++;
+ } else {
+ if (isdigit(*cp)) { /* LINE ADDRESS */
+ line_s = cp;
+ while (isdigit(*cp))
+ cp++;
+ if (cp > line_s) {
+ /* numeric line */
+ saved = *cp;
+ *cp = '\0';
+ addr_line = atoi(line_s);
+ *cp = saved;
+ }
+ } else if (*cp == '/') { /* PATTERN ADDRESS */
+ pos = addr_pattern = cp + 1;
+ pos = strchr(pos, '/');
+ if (!pos)
+ usage(sed_usage);
+ *pos = '\0';
+ cp = pos + 1;
+ }
+ }
+
+ SKIPSPACES(cp);
+ if (*cp == '!') {
+ negated++;
+ cp++;
+ }
+
+ /* Read command */
+
+ SKIPSPACES(cp);
+ switch (*cp) {
+ case 's': /* REPLACE */
+ if (strlen(cp) <= 3 || *(cp + 1) != '/')
+ break;
+ sed_f = f_replace;
+
+ pos = needle = cp + 2;
+
+ for (;;) {
+ pos = strchr(pos, '/');
+ if (pos == NULL) {
+ usage(sed_usage);
+ }
+ if (*(pos - 1) == '\\') {
+ pos++;
+ continue;
+ }
+ break;
+ }
+ *pos = 0;
+ newNeedle = ++pos;
+ for (;;) {
+ pos = strchr(pos, '/');
+ if (pos == NULL) {
+ usage(sed_usage);
+ }
+ if (*(pos - 1) == '\\') {
+ pos++;
+ continue;
+ }
+ break;
+ }
+ *pos = 0;
+ if (pos + 2 != 0) {
+ while (*++pos) {
+ switch (*pos) {
+ case 'i':
+ ignoreCase = TRUE;
+ break;
+ case 'p':
+ printFlag = TRUE;
+ break;
+ case 'g':
+ break;
+ default:
+ usage(sed_usage);
+ }
+ }
+ }
+ cp = pos;
+ /* fprintf(stderr, "replace '%s' with '%s'\n", needle, newNeedle); */
+ break;
+
+ case 'a': /* APPEND */
+ if (strlen(cp) < 2)
+ break;
+ sed_f = f_append;
+ appendline = ++cp;
+ /* fprintf(stderr, "append '%s'\n", appendline); */
+ break;
+ }
+
+ stopNow = TRUE;
+ break;
+
+ default:
+ usage(sed_usage);
+ }
+ }
}
if (argc == 0) {