[pacman-dev] [PATCH 4/5] check for overflow when setting HTTP_USER_AGENT
gcc7 issues a warning about a potential overflow if left unchecked. Signed-off-by: Andrew Gregory <andrew.gregory.8@gmail.com> --- src/pacman/pacman.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/src/pacman/pacman.c b/src/pacman/pacman.c index 605aec3e..11b7e6f0 100644 --- a/src/pacman/pacman.c +++ b/src/pacman/pacman.c @@ -271,10 +271,15 @@ static void setuseragent(void) { char agent[101]; struct utsname un; + int len; uname(&un); - snprintf(agent, 100, "pacman/%s (%s %s) libalpm/%s", + len = snprintf(agent, 100, "pacman/%s (%s %s) libalpm/%s", PACKAGE_VERSION, un.sysname, un.machine, alpm_version()); + if(len >= 100) { + pm_printf(ALPM_LOG_WARNING, _("HTTP_USER_AGENT truncated\n")); + } + setenv("HTTP_USER_AGENT", agent, 0); } -- 2.12.2
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Andrew Gregory