diff options
Diffstat (limited to 'abspath.c')
| -rw-r--r-- | abspath.c | 67 |
1 files changed, 58 insertions, 9 deletions
@@ -1,5 +1,16 @@ #include "cache.h" +/* + * Do not use this for inspecting *tracked* content. When path is a + * symlink to a directory, we do not want to say it is a directory when + * dealing with tracked content in the working tree. + */ +int is_directory(const char *path) +{ + struct stat st; + return (!stat(path, &st) && S_ISDIR(st.st_mode)); +} + /* We allow "recursive" symbolic links. Only within reason, though. */ #define MAXDEPTH 5 @@ -7,7 +18,7 @@ const char *make_absolute_path(const char *path) { static char bufs[2][PATH_MAX + 1], *buf = bufs[0], *next_buf = bufs[1]; char cwd[1024] = ""; - int buf_index = 1, len; + int buf_index = 1; int depth = MAXDEPTH; char *last_elem = NULL; @@ -17,7 +28,7 @@ const char *make_absolute_path(const char *path) die ("Too long path: %.*s", 60, path); while (depth--) { - if (stat(buf, &st) || !S_ISDIR(st.st_mode)) { + if (!is_directory(buf)) { char *last_slash = strrchr(buf, '/'); if (last_slash) { *last_slash = '\0'; @@ -30,16 +41,16 @@ const char *make_absolute_path(const char *path) if (*buf) { if (!*cwd && !getcwd(cwd, sizeof(cwd))) - die ("Could not get current working directory"); + die_errno ("Could not get current working directory"); if (chdir(buf)) - die ("Could not switch to '%s'", buf); + die_errno ("Could not switch to '%s'", buf); } if (!getcwd(buf, PATH_MAX)) - die ("Could not get current working directory"); + die_errno ("Could not get current working directory"); if (last_elem) { - int len = strlen(buf); + size_t len = strlen(buf); if (len + strlen(last_elem) + 2 > PATH_MAX) die ("Too long path name: '%s/%s'", buf, last_elem); @@ -50,9 +61,11 @@ const char *make_absolute_path(const char *path) } if (!lstat(buf, &st) && S_ISLNK(st.st_mode)) { - len = readlink(buf, next_buf, PATH_MAX); + ssize_t len = readlink(buf, next_buf, PATH_MAX); if (len < 0) - die ("Invalid symlink: %s", buf); + die_errno ("Invalid symlink '%s'", buf); + if (PATH_MAX <= len) + die("symbolic link too long: %s", buf); next_buf[len] = '\0'; buf = next_buf; buf_index = 1 - buf_index; @@ -62,7 +75,43 @@ const char *make_absolute_path(const char *path) } if (*cwd && chdir(cwd)) - die ("Could not change back to '%s'", cwd); + die_errno ("Could not change back to '%s'", cwd); return buf; } + +static const char *get_pwd_cwd(void) +{ + static char cwd[PATH_MAX + 1]; + char *pwd; + struct stat cwd_stat, pwd_stat; + if (getcwd(cwd, PATH_MAX) == NULL) + return NULL; + pwd = getenv("PWD"); + if (pwd && strcmp(pwd, cwd)) { + stat(cwd, &cwd_stat); + if (!stat(pwd, &pwd_stat) && + pwd_stat.st_dev == cwd_stat.st_dev && + pwd_stat.st_ino == cwd_stat.st_ino) { + strlcpy(cwd, pwd, PATH_MAX); + } + } + return cwd; +} + +const char *make_nonrelative_path(const char *path) +{ + static char buf[PATH_MAX + 1]; + + if (is_absolute_path(path)) { + if (strlcpy(buf, path, PATH_MAX) >= PATH_MAX) + die("Too long path: %.*s", 60, path); + } else { + const char *cwd = get_pwd_cwd(); + if (!cwd) + die_errno("Cannot determine the current working directory"); + if (snprintf(buf, PATH_MAX, "%s/%s", cwd, path) >= PATH_MAX) + die("Too long path: %.*s", 60, path); + } + return buf; +} |