From f22a76e9110e8e31efa3781b1a3cf2b4565d9e8a Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Ren=C3=A9=20Scharfe?= Date: Mon, 28 Jul 2014 20:24:29 +0200 Subject: strbuf: add strbuf_getcwd() 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 Helped-by: Duy Nguyen Signed-off-by: Rene Scharfe Signed-off-by: Junio C Hamano --- strbuf.c | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) (limited to 'strbuf.c') diff --git a/strbuf.c b/strbuf.c index ee96dcfb81..f3af203ec7 100644 --- a/strbuf.c +++ b/strbuf.c @@ -398,6 +398,27 @@ 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; -- cgit v1.2.1 From 679eebe24d4c2120f8c01fb4524fcc489718fc9c Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Ren=C3=A9=20Scharfe?= Date: Mon, 28 Jul 2014 20:33:55 +0200 Subject: abspath: convert absolute_path() to strbuf Move most of the code of absolute_path() into the new function strbuf_add_absolute_path() and in the process transform it to use struct strbuf and xgetcwd() instead of a PATH_MAX-sized buffer, which can be too small on some file systems. Signed-off-by: Rene Scharfe Signed-off-by: Junio C Hamano --- strbuf.c | 25 +++++++++++++++++++++++++ 1 file changed, 25 insertions(+) (limited to 'strbuf.c') diff --git a/strbuf.c b/strbuf.c index f3af203ec7..bf4c31b157 100644 --- a/strbuf.c +++ b/strbuf.c @@ -568,6 +568,31 @@ void strbuf_humanise_bytes(struct strbuf *buf, off_t bytes) } } +void strbuf_add_absolute_path(struct strbuf *sb, const char *path) +{ + if (!*path) + die("The empty string is not a valid path"); + if (!is_absolute_path(path)) { + struct stat cwd_stat, pwd_stat; + size_t orig_len = sb->len; + char *cwd = xgetcwd(); + char *pwd = getenv("PWD"); + if (pwd && strcmp(pwd, cwd) && + !stat(cwd, &cwd_stat) && + (cwd_stat.st_dev || cwd_stat.st_ino) && + !stat(pwd, &pwd_stat) && + pwd_stat.st_dev == cwd_stat.st_dev && + pwd_stat.st_ino == cwd_stat.st_ino) + strbuf_addstr(sb, pwd); + else + strbuf_addstr(sb, cwd); + if (sb->len > orig_len && !is_dir_sep(sb->buf[sb->len - 1])) + strbuf_addch(sb, '/'); + free(cwd); + } + strbuf_addstr(sb, path); +} + int printf_ln(const char *fmt, ...) { int ret; -- cgit v1.2.1