diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/expand.c | 9 | ||||
| -rw-r--r-- | src/expand.h | 3 | ||||
| -rw-r--r-- | src/miscbltin.c | 97 |
3 files changed, 74 insertions, 35 deletions
diff --git a/src/expand.c b/src/expand.c index 7995d40..48c45e5 100644 --- a/src/expand.c +++ b/src/expand.c @@ -117,9 +117,6 @@ STATIC char *evalvar(char *, int); STATIC size_t strtodest(const char *, const char *, int); STATIC void memtodest(const char *, size_t, const char *, int); STATIC ssize_t varvalue(char *, int, int); -STATIC void recordregion(int, int, int); -STATIC void removerecordregions(int); -STATIC void ifsbreakup(char *, struct arglist *); STATIC void ifsfree(void); STATIC void expandmeta(struct strlist *, int); #ifdef HAVE_GLOB @@ -412,7 +409,7 @@ lose: } -STATIC void +void removerecordregions(int endoff) { if (ifslastp == NULL) @@ -1001,7 +998,7 @@ value: * string for IFS characters. */ -STATIC void +void recordregion(int start, int end, int nulonly) { struct ifsregion *ifsp; @@ -1028,7 +1025,7 @@ recordregion(int start, int end, int nulonly) * strings to the argument list. The regions of the string to be * searched for IFS characters have been stored by recordregion. */ -STATIC void +void ifsbreakup(char *string, struct arglist *arglist) { struct ifsregion *ifsp; diff --git a/src/expand.h b/src/expand.h index 1862aea..405af0b 100644 --- a/src/expand.h +++ b/src/expand.h @@ -67,6 +67,9 @@ void expari(int); #define rmescapes(p) _rmescapes((p), 0) char *_rmescapes(char *, int); int casematch(union node *, char *); +void recordregion(int, int, int); +void removerecordregions(int); +void ifsbreakup(char *, struct arglist *); /* From arith.y */ intmax_t arith(const char *); diff --git a/src/miscbltin.c b/src/miscbltin.c index 3f91bc3..cca0f6c 100644 --- a/src/miscbltin.c +++ b/src/miscbltin.c @@ -55,14 +55,73 @@ #include "miscbltin.h" #include "mystring.h" #include "main.h" +#include "expand.h" +#include "parser.h" #undef rflag +/** handle one line of the read command. + * more fields than variables -> remainder shall be part of last variable. + * less fields than variables -> remaining variables unset. + * + * @param line complete line of input + * @param ap argument (variable) list + * @param len length of line including trailing '\0' + */ +static void +readcmd_handle_line(char *line, char **ap, size_t len) +{ + struct arglist arglist; + struct strlist *sl; + char *s, *backup; + + /* ifsbreakup will fiddle with stack region... */ + s = grabstackstr(line + len); + + /* need a copy, so that delimiters aren't lost + * in case there are more fields than variables */ + backup = sstrdup(line); + + arglist.lastp = &arglist.list; + recordregion(0, len, 0); + + ifsbreakup(s, &arglist); + *arglist.lastp = NULL; + removerecordregions(0); + + for (sl = arglist.list; sl; sl = sl->next) { + /* remaining fields present, but no variables left. */ + if (!ap[1]) { + size_t offset; + char *remainder; + + /* FIXME little bit hacky, assuming that ifsbreakup + * will not modify the length of the string */ + offset = sl->text - s; + remainder = backup + offset; + rmescapes(remainder); + setvar(*ap, remainder, 0); + + return; + } + + /* set variable to field */ + rmescapes(sl->text); + setvar(*ap, sl->text, 0); + ap++; + } + + /* nullify remaining arguments */ + do { + setvar(*ap, nullstr, 0); + } while (*++ap); +} /* * The read builtin. The -e option causes backslashes to escape the - * following character. + * following character. The -p option followed by an argument prompts + * with the argument. * * This uses unbuffered input, which may be avoidable in some cases. */ @@ -75,9 +134,7 @@ readcmd(int argc, char **argv) char c; int rflag; char *prompt; - const char *ifs; char *p; - int startword; int status; int i; @@ -97,10 +154,7 @@ readcmd(int argc, char **argv) } if (*(ap = argptr) == NULL) sh_error("arg count"); - if ((ifs = bltinlookup("IFS")) == NULL) - ifs = defifs; status = 0; - startword = 1; backslash = 0; STARTSTACKSTR(p); for (;;) { @@ -111,10 +165,10 @@ readcmd(int argc, char **argv) if (c == '\0') continue; if (backslash) { - backslash = 0; - if (c != '\n') - goto put; - continue; + if (c == '\n') + goto resetbs; + STPUTC(CTLESC, p); + goto put; } if (!rflag && c == '\\') { backslash++; @@ -122,28 +176,13 @@ readcmd(int argc, char **argv) } if (c == '\n') break; - if (startword && *ifs == ' ' && strchr(ifs, c)) { - continue; - } - startword = 0; - if (ap[1] != NULL && strchr(ifs, c) != NULL) { - STACKSTRNUL(p); - setvar(*ap, stackblock(), 0); - ap++; - startword = 1; - STARTSTACKSTR(p); - } else { put: - STPUTC(c, p); - } + STPUTC(c, p); +resetbs: + backslash = 0; } STACKSTRNUL(p); - /* Remove trailing blanks */ - while ((char *)stackblock() <= --p && strchr(ifs, *p) != NULL) - *p = '\0'; - setvar(*ap, stackblock(), 0); - while (*++ap != NULL) - setvar(*ap, nullstr, 0); + readcmd_handle_line(stackblock(), ap, p - (char *)stackblock()); return status; } |