diff options
Diffstat (limited to 'config.c')
| -rw-r--r-- | config.c | 301 |
1 files changed, 236 insertions, 65 deletions
@@ -10,20 +10,69 @@ #include "strbuf.h" #include "quote.h" -typedef struct config_file { - struct config_file *prev; - FILE *f; +struct config_source { + struct config_source *prev; + union { + FILE *file; + struct config_buf { + const char *buf; + size_t len; + size_t pos; + } buf; + } u; const char *name; + int die_on_error; int linenr; int eof; struct strbuf value; struct strbuf var; -} config_file; -static config_file *cf; + int (*do_fgetc)(struct config_source *c); + int (*do_ungetc)(int c, struct config_source *conf); + long (*do_ftell)(struct config_source *c); +}; + +static struct config_source *cf; static int zlib_compression_seen; +static int config_file_fgetc(struct config_source *conf) +{ + return fgetc(conf->u.file); +} + +static int config_file_ungetc(int c, struct config_source *conf) +{ + return ungetc(c, conf->u.file); +} + +static long config_file_ftell(struct config_source *conf) +{ + return ftell(conf->u.file); +} + + +static int config_buf_fgetc(struct config_source *conf) +{ + if (conf->u.buf.pos < conf->u.buf.len) + return conf->u.buf.buf[conf->u.buf.pos++]; + + return EOF; +} + +static int config_buf_ungetc(int c, struct config_source *conf) +{ + if (conf->u.buf.pos > 0) + return conf->u.buf.buf[--conf->u.buf.pos]; + + return EOF; +} + +static long config_buf_ftell(struct config_source *conf) +{ + return conf->u.buf.pos; +} + #define MAX_INCLUDE_DEPTH 10 static const char include_depth_advice[] = "exceeded maximum include depth (%d) while including\n" @@ -168,27 +217,22 @@ int git_config_from_parameters(config_fn_t fn, void *data) static int get_next_char(void) { - int c; - FILE *f; - - c = '\n'; - if (cf && ((f = cf->f) != NULL)) { - c = fgetc(f); - if (c == '\r') { - /* DOS like systems */ - c = fgetc(f); - if (c != '\n') { - ungetc(c, f); - c = '\r'; - } - } - if (c == '\n') - cf->linenr++; - if (c == EOF) { - cf->eof = 1; - c = '\n'; + int c = cf->do_fgetc(cf); + + if (c == '\r') { + /* DOS like systems */ + c = cf->do_fgetc(cf); + if (c != '\n') { + cf->do_ungetc(c, cf); + c = '\r'; } } + if (c == '\n') + cf->linenr++; + if (c == EOF) { + cf->eof = 1; + c = '\n'; + } return c; } @@ -339,7 +383,7 @@ static int get_base_var(struct strbuf *name) } } -static int git_parse_file(config_fn_t fn, void *data) +static int git_parse_source(config_fn_t fn, void *data) { int comment = 0; int baselen = 0; @@ -399,7 +443,10 @@ static int git_parse_file(config_fn_t fn, void *data) if (get_value(fn, data, var) < 0) break; } - die("bad config file line %d in %s", cf->linenr, cf->name); + if (cf->die_on_error) + die("bad config file line %d in %s", cf->linenr, cf->name); + else + return error("bad config file line %d in %s", cf->linenr, cf->name); } static int parse_unit_factor(const char *end, uintmax_t *val) @@ -421,7 +468,7 @@ static int parse_unit_factor(const char *end, uintmax_t *val) return 0; } -static int git_parse_long(const char *value, long *ret) +static int git_parse_signed(const char *value, intmax_t *ret, intmax_t max) { if (value && *value) { char *end; @@ -433,21 +480,25 @@ static int git_parse_long(const char *value, long *ret) val = strtoimax(value, &end, 0); if (errno == ERANGE) return 0; - if (!parse_unit_factor(end, &factor)) + if (!parse_unit_factor(end, &factor)) { + errno = EINVAL; return 0; + } uval = abs(val); uval *= factor; - if ((uval > maximum_signed_value_of_type(long)) || - (abs(val) > uval)) + if (uval > max || abs(val) > uval) { + errno = ERANGE; return 0; + } val *= factor; *ret = val; return 1; } + errno = EINVAL; return 0; } -int git_parse_ulong(const char *value, unsigned long *ret) +static int git_parse_unsigned(const char *value, uintmax_t *ret, uintmax_t max) { if (value && *value) { char *end; @@ -459,29 +510,75 @@ int git_parse_ulong(const char *value, unsigned long *ret) if (errno == ERANGE) return 0; oldval = val; - if (!parse_unit_factor(end, &val)) + if (!parse_unit_factor(end, &val)) { + errno = EINVAL; return 0; - if ((val > maximum_unsigned_value_of_type(long)) || - (oldval > val)) + } + if (val > max || oldval > val) { + errno = ERANGE; return 0; + } *ret = val; return 1; } + errno = EINVAL; return 0; } -static void die_bad_config(const char *name) +static int git_parse_int(const char *value, int *ret) +{ + intmax_t tmp; + if (!git_parse_signed(value, &tmp, maximum_signed_value_of_type(int))) + return 0; + *ret = tmp; + return 1; +} + +static int git_parse_int64(const char *value, int64_t *ret) +{ + intmax_t tmp; + if (!git_parse_signed(value, &tmp, maximum_signed_value_of_type(int64_t))) + return 0; + *ret = tmp; + return 1; +} + +int git_parse_ulong(const char *value, unsigned long *ret) +{ + uintmax_t tmp; + if (!git_parse_unsigned(value, &tmp, maximum_unsigned_value_of_type(long))) + return 0; + *ret = tmp; + return 1; +} + +static void die_bad_number(const char *name, const char *value) { + const char *reason = errno == ERANGE ? + "out of range" : + "invalid unit"; + if (!value) + value = ""; + if (cf && cf->name) - die("bad config value for '%s' in %s", name, cf->name); - die("bad config value for '%s'", name); + die("bad numeric config value '%s' for '%s' in %s: %s", + value, name, cf->name, reason); + die("bad numeric config value '%s' for '%s': %s", value, name, reason); } int git_config_int(const char *name, const char *value) { - long ret = 0; - if (!git_parse_long(value, &ret)) - die_bad_config(name); + int ret; + if (!git_parse_int(value, &ret)) + die_bad_number(name, value); + return ret; +} + +int64_t git_config_int64(const char *name, const char *value) +{ + int64_t ret; + if (!git_parse_int64(value, &ret)) + die_bad_number(name, value); return ret; } @@ -489,7 +586,7 @@ unsigned long git_config_ulong(const char *name, const char *value) { unsigned long ret; if (!git_parse_ulong(value, &ret)) - die_bad_config(name); + die_bad_number(name, value); return ret; } @@ -512,10 +609,10 @@ static int git_config_maybe_bool_text(const char *name, const char *value) int git_config_maybe_bool(const char *name, const char *value) { - long v = git_config_maybe_bool_text(name, value); + int v = git_config_maybe_bool_text(name, value); if (0 <= v) return v; - if (git_parse_long(value, &v)) + if (git_parse_int(value, &v)) return !!v; return -1; } @@ -906,6 +1003,33 @@ int git_default_config(const char *var, const char *value, void *dummy) return 0; } +/* + * All source specific fields in the union, die_on_error, name and the callbacks + * fgetc, ungetc, ftell of top need to be initialized before calling + * this function. + */ +static int do_config_from(struct config_source *top, config_fn_t fn, void *data) +{ + int ret; + + /* push config-file parsing state stack */ + top->prev = cf; + top->linenr = 1; + top->eof = 0; + strbuf_init(&top->value, 1024); + strbuf_init(&top->var, 1024); + cf = top; + + ret = git_parse_source(fn, data); + + /* pop config-file parsing state stack */ + strbuf_release(&top->value); + strbuf_release(&top->var); + cf = top->prev; + + return ret; +} + int git_config_from_file(config_fn_t fn, const char *filename, void *data) { int ret; @@ -913,30 +1037,74 @@ int git_config_from_file(config_fn_t fn, const char *filename, void *data) ret = -1; if (f) { - config_file top; + struct config_source top; - /* push config-file parsing state stack */ - top.prev = cf; - top.f = f; + top.u.file = f; top.name = filename; - top.linenr = 1; - top.eof = 0; - strbuf_init(&top.value, 1024); - strbuf_init(&top.var, 1024); - cf = ⊤ - - ret = git_parse_file(fn, data); + top.die_on_error = 1; + top.do_fgetc = config_file_fgetc; + top.do_ungetc = config_file_ungetc; + top.do_ftell = config_file_ftell; - /* pop config-file parsing state stack */ - strbuf_release(&top.value); - strbuf_release(&top.var); - cf = top.prev; + ret = do_config_from(&top, fn, data); fclose(f); } return ret; } +int git_config_from_buf(config_fn_t fn, const char *name, const char *buf, + size_t len, void *data) +{ + struct config_source top; + + top.u.buf.buf = buf; + top.u.buf.len = len; + top.u.buf.pos = 0; + top.name = name; + top.die_on_error = 0; + top.do_fgetc = config_buf_fgetc; + top.do_ungetc = config_buf_ungetc; + top.do_ftell = config_buf_ftell; + + return do_config_from(&top, fn, data); +} + +static int git_config_from_blob_sha1(config_fn_t fn, + const char *name, + const unsigned char *sha1, + void *data) +{ + enum object_type type; + char *buf; + unsigned long size; + int ret; + + buf = read_sha1_file(sha1, &type, &size); + if (!buf) + return error("unable to load config blob object '%s'", name); + if (type != OBJ_BLOB) { + free(buf); + return error("reference '%s' does not point to a blob", name); + } + + ret = git_config_from_buf(fn, name, buf, size, data); + free(buf); + + return ret; +} + +static int git_config_from_blob_ref(config_fn_t fn, + const char *name, + void *data) +{ + unsigned char sha1[20]; + + if (get_sha1(name, sha1) < 0) + return error("unable to resolve config blob '%s'", name); + return git_config_from_blob_sha1(fn, name, sha1, data); +} + const char *git_etc_gitconfig(void) { static const char *system_wide; @@ -1002,7 +1170,9 @@ int git_config_early(config_fn_t fn, void *data, const char *repo_config) } int git_config_with_options(config_fn_t fn, void *data, - const char *filename, int respect_includes) + const char *filename, + const char *blob_ref, + int respect_includes) { char *repo_config = NULL; int ret; @@ -1021,6 +1191,8 @@ int git_config_with_options(config_fn_t fn, void *data, */ if (filename) return git_config_from_file(fn, filename, data); + else if (blob_ref) + return git_config_from_blob_ref(fn, blob_ref, data); repo_config = git_pathdup("config"); ret = git_config_early(fn, data, repo_config); @@ -1031,7 +1203,7 @@ int git_config_with_options(config_fn_t fn, void *data, int git_config(config_fn_t fn, void *data) { - return git_config_with_options(fn, data, NULL, 1); + return git_config_with_options(fn, data, NULL, NULL, 1); } /* @@ -1063,7 +1235,6 @@ static int store_aux(const char *key, const char *value, void *cb) { const char *ep; size_t section_len; - FILE *f = cf->f; switch (store.state) { case KEY_SEEN: @@ -1075,7 +1246,7 @@ static int store_aux(const char *key, const char *value, void *cb) return 1; } - store.offset[store.seen] = ftell(f); + store.offset[store.seen] = cf->do_ftell(cf); store.seen++; } break; @@ -1102,19 +1273,19 @@ static int store_aux(const char *key, const char *value, void *cb) * Do not increment matches: this is no match, but we * just made sure we are in the desired section. */ - store.offset[store.seen] = ftell(f); + store.offset[store.seen] = cf->do_ftell(cf); /* fallthru */ case SECTION_END_SEEN: case START: if (matches(key, value)) { - store.offset[store.seen] = ftell(f); + store.offset[store.seen] = cf->do_ftell(cf); store.state = KEY_SEEN; store.seen++; } else { if (strrchr(key, '.') - key == store.baselen && !strncmp(key, store.key, store.baselen)) { store.state = SECTION_SEEN; - store.offset[store.seen] = ftell(f); + store.offset[store.seen] = cf->do_ftell(cf); } } } |