[libvirt] [PATCH 08/12] util: use GRegex in virCommandRunRegex

This saves us from allocating vars upfront, since GLib deals with that for us. Signed-off-by: Ján Tomko <jtomko(a)redhat.com&gt; --- src/util/vircommand.c | 37 +++++++++++++------------------------ 1 file changed, 13 insertions(+), 24 deletions(-) diff --git a/src/util/vircommand.c b/src/util/vircommand.c index 49432ddfcb..1ab3dbc819 100644 --- a/src/util/vircommand.c +++ b/src/util/vircommand.c @@ -22,7 +22,6 @@ #include <config.h> #include <poll.h> -#include <regex.h> #include <signal.h> #include <stdarg.h> #include <sys/stat.h> @@ -3077,11 +3076,10 @@ virCommandRunRegex(virCommandPtr cmd, const char *prefix, int *exitstatus) { - int err; - regex_t *reg; - g_autofree regmatch_t *vars = NULL; + GRegex **reg = NULL; + g_autoptr(GMatchInfo) info = NULL; size_t i, j, k; - int totgroups = 0, ngroup = 0, maxvars = 0; + int totgroups = 0, ngroup = 0; char **groups; g_autofree char *outbuf = NULL; VIR_AUTOSTRINGLIST lines = NULL; @@ -3092,29 +3090,23 @@ virCommandRunRegex(virCommandPtr cmd, return -1; for (i = 0; i < nregex; i++) { - err = regcomp(&reg[i], regex[i], REG_EXTENDED); - if (err != 0) { - char error[100]; - regerror(err, &reg[i], error, sizeof(error)); + g_autoptr(GError) err = NULL; + reg[i] = g_regex_new(regex[i], G_REGEX_OPTIMIZE, 0, &err); + if (!reg[i]) { virReportError(VIR_ERR_INTERNAL_ERROR, - _("Failed to compile regex %s"), error); + _("Failed to compile regex %s"), err->message); for (j = 0; j < i; j++) - regfree(&reg[j]); + g_regex_unref(reg[j]); VIR_FREE(reg); return -1; } totgroups += nvars[i]; - if (nvars[i] > maxvars) - maxvars = nvars[i]; - } /* Storage for matched variables */ if (VIR_ALLOC_N(groups, totgroups) < 0) goto cleanup; - if (VIR_ALLOC_N(vars, maxvars+1) < 0) - goto cleanup; virCommandSetOutputBuffer(cmd, &outbuf); if (virCommandRun(cmd, exitstatus) < 0) @@ -3140,15 +3132,12 @@ virCommandRunRegex(virCommandPtr cmd, ngroup = 0; for (i = 0; i < nregex; i++) { - if (regexec(&reg[i], p, nvars[i]+1, vars, 0) != 0) + if (!(g_regex_match(reg[i], p, 0, &info))) break; - /* NB vars[0] is the full pattern, so we offset j by 1 */ - for (j = 1; j <= nvars[i]; j++) { - if (VIR_STRNDUP(groups[ngroup++], p + vars[j].rm_so, - vars[j].rm_eo - vars[j].rm_so) < 0) - goto cleanup; - } + /* NB match #0 is the full pattern, so we offset j by 1 */ + for (j = 1; j <= nvars[i]; j++) + groups[ngroup++] = g_match_info_fetch(info, j); } /* We've matched on the last regex, so callback time */ @@ -3170,7 +3159,7 @@ virCommandRunRegex(virCommandPtr cmd, } for (i = 0; i < nregex; i++) - regfree(&reg[i]); + g_regex_unref(reg[i]); VIR_FREE(reg); return ret; -- 2.21.0