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add new builtin “realpath” calling realpath(3) on its argument, skipping

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over “--” for compatibility to Debian realpath(1) and possibly busybox’

“sounds handy” replaced@TNF
This commit is contained in:
tg
2008-05-17 18:27:57 +00:00
parent b40ba2c8d1
commit b41a72ac2e
7 changed files with 86 additions and 15 deletions
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43
funcs.c
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@ -5,7 +5,7 @@
#include "sh.h"
__RCSID("$MirOS: src/bin/mksh/funcs.c,v 1.79 2008/04/22 18:58:20 tg Exp $");
__RCSID("$MirOS: src/bin/mksh/funcs.c,v 1.80 2008/05/17 18:27:55 tg Exp $");
/* A leading = means assignments before command are kept;
* a leading * means a POSIX special builtin;
@ -56,6 +56,9 @@ const struct builtin mkshbuiltins[] = {
{"bind", c_bind},
#if HAVE_MKNOD
{"mknod", c_mknod},
#endif
#if HAVE_REALPATH
{"realpath", c_realpath},
#endif
{"rename", c_rename},
{NULL, (int (*)(const char **))NULL}
@ -3047,3 +3050,41 @@ c_rename(const char **wp)
return (rv);
}
#if HAVE_REALPATH
int
c_realpath(const char **wp)
{
int rv = 1;
if (wp != NULL && wp[0] != NULL && wp[1] != NULL) {
if (strcmp(wp[1], "--")) {
if (wp[2] == NULL) {
wp += 1;
rv = 0;
}
} else {
if (wp[2] != NULL && wp[3] == NULL) {
wp += 2;
rv = 0;
}
}
}
if (rv)
bi_errorf(T_synerr);
else {
char *buf;
buf = alloc(PATH_MAX, ATEMP);
if (realpath(*wp, buf) == NULL) {
rv = errno;
bi_errorf("%s: %s", *wp, strerror(rv));
} else
shprintf("%s\n", buf);
afree(buf, ATEMP);
}
return (rv);
}
#endif