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authorDavid Oberhollenzer <david.oberhollenzer@tele2.at>2018-04-04 11:55:59 +0200
committerDavid Oberhollenzer <david.oberhollenzer@tele2.at>2018-04-04 11:55:59 +0200
commitca7b7c15c5ecd344e844411e4b8409e552a3b06d (patch)
tree7bebbde8559d67e1f5450657f8a44ab05e48feac /lib/src/rdline.c
parent352a9060b6813c41527f0c5da43f0c86aecfde2a (diff)
Merge argument substitution into rdline
Signed-off-by: David Oberhollenzer <david.oberhollenzer@tele2.at>
Diffstat (limited to 'lib/src/rdline.c')
-rw-r--r--lib/src/rdline.c60
1 files changed, 45 insertions, 15 deletions
diff --git a/lib/src/rdline.c b/lib/src/rdline.c
index 4e72a25..d6c4078 100644
--- a/lib/src/rdline.c
+++ b/lib/src/rdline.c
@@ -27,33 +27,45 @@ enum {
STATE_STRING = 1,
STATE_STRING_ESC = 2,
STATE_COMMENT = 3,
+ STATE_ARG = 4,
};
-char *rdline(int fd)
+char *rdline(int fd, int argc, const char *const *argv)
{
size_t i = 0, bufsiz = 0, newsz;
int ret, state = STATE_INITIAL;
char c, *new, *buffer = NULL;
+ const char *argstr = NULL;
for (;;) {
- switch (read(fd, &c, 1)) {
- case 0:
- if (i == 0) {
- errno = 0;
- return NULL;
- }
- c = '\0';
- break;
- case 1:
- if (c == '\n')
+ if (argstr == NULL) {
+ switch (read(fd, &c, 1)) {
+ case 0:
+ if (i == 0) {
+ errno = 0;
+ return NULL;
+ }
c = '\0';
- break;
- default:
- if (errno == EINTR)
+ break;
+ case 1:
+ break;
+ default:
+ if (errno == EINTR)
+ continue;
+ goto fail;
+ }
+ } else {
+ c = *(argstr++);
+
+ if (c == '\0') {
+ argstr = NULL;
continue;
- goto fail;
+ }
}
+ if (c == '\n')
+ c = '\0';
+
switch (state) {
case STATE_STRING:
if (c == '\\')
@@ -68,6 +80,20 @@ char *rdline(int fd)
if (c != '\0')
continue;
break;
+ case STATE_ARG:
+ state = STATE_INITIAL;
+ if (c == '%')
+ break;
+ if (!isdigit(c) || (c - '0') >= argc) {
+ errno = EINVAL;
+ goto fail;
+ }
+ if (argstr != NULL) {
+ errno = ELOOP;
+ goto fail;
+ }
+ argstr = argv[c - '0'];
+ continue;
default:
if (isspace(c))
c = ' ';
@@ -77,6 +103,10 @@ char *rdline(int fd)
state = STATE_COMMENT;
continue;
}
+ if (c == '%') {
+ state = STATE_ARG;
+ continue;
+ }
if (c == '"')
state = STATE_STRING;
break;