Add strbuf_getcwd(), which puts the current working directory into a
strbuf. Because it doesn't use a fixed-size buffer it supports
arbitrarily long paths, provided the platform's getcwd() does as well.
At least on Linux and FreeBSD it handles paths longer than PATH_MAX
just fine.
Suggested-by: Karsten Blees <karsten.blees@xxxxxxxxx>
Helped-by: Duy Nguyen <pclouds@xxxxxxxxx>
Signed-off-by: Rene Scharfe <l.s.r@xxxxxx>
---
Documentation/technical/api-strbuf.txt | 4 ++++
strbuf.c | 21 +++++++++++++++++++++
strbuf.h | 1 +
3 files changed, 26 insertions(+)
diff --git a/Documentation/technical/api-strbuf.txt b/Documentation/technical/api-strbuf.txt
index f9c06a7..49e477d 100644
--- a/Documentation/technical/api-strbuf.txt
+++ b/Documentation/technical/api-strbuf.txt
@@ -307,6 +307,10 @@ same behaviour as well.
use it unless you need the correct position in the file
descriptor.
+`strbuf_getcwd`::
+
+ Set the buffer to the path of the current working directory.
+
`stripspace`::
Strip whitespace from a buffer. The second parameter controls if
diff --git a/strbuf.c b/strbuf.c
index 33018d8..2bf4dfa 100644
--- a/strbuf.c
+++ b/strbuf.c
@@ -406,6 +406,27 @@ int strbuf_readlink(struct strbuf *sb, const char *path, size_t hint)
return -1;
}
+int strbuf_getcwd(struct strbuf *sb)
+{
+ size_t oldalloc = sb->alloc;
+ size_t guessed_len = 128;
+
+ for (;; guessed_len *= 2) {
+ strbuf_grow(sb, guessed_len);
+ if (getcwd(sb->buf, sb->alloc)) {
+ strbuf_setlen(sb, strlen(sb->buf));
+ return 0;
+ }
+ if (errno != ERANGE)
+ break;
+ }
+ if (oldalloc == 0)
+ strbuf_release(sb);
+ else
+ strbuf_reset(sb);
+ return -1;
+}
+
int strbuf_getwholeline(struct strbuf *sb, FILE *fp, int term)
{
int ch;
diff --git a/strbuf.h b/strbuf.h
index a7c0192..bc38bb9 100644
--- a/strbuf.h
+++ b/strbuf.h
@@ -174,6 +174,7 @@ extern size_t strbuf_fread(struct strbuf *, size_t, FILE *);
extern ssize_t strbuf_read(struct strbuf *, int fd, size_t hint);
extern int strbuf_read_file(struct strbuf *sb, const char *path, size_t hint);
extern int strbuf_readlink(struct strbuf *sb, const char *path, size_t hint);
+extern int strbuf_getcwd(struct strbuf *sb);
extern int strbuf_getwholeline(struct strbuf *, FILE *, int);
extern int strbuf_getline(struct strbuf *, FILE *, int);
--
2.0.2
--
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