[pacman-dev] [PATCH] Size handling was changed in fgets() functions
Laszlo Papp
djszapi2 at gmail.com
Sat Oct 17 17:54:07 EDT 2009
Pacman's fgets function in the API used hardcoded numbers to identify the size.
This is not good practice, so replace them with sizeof handling.
Signed-off-by: Laszlo Papp <djszapi at archlinux.us>
---
lib/libalpm/be_files.c | 49 ++++++++++++++++++++++++-----------------------
lib/libalpm/trans.c | 3 +-
src/pacman/util.c | 3 +-
3 files changed, 29 insertions(+), 26 deletions(-)
diff --git a/lib/libalpm/be_files.c b/lib/libalpm/be_files.c
index 53bbda1..ffbaa8d 100644
--- a/lib/libalpm/be_files.c
+++ b/lib/libalpm/be_files.c
@@ -387,6 +387,7 @@ int _alpm_db_read(pmdb_t *db, pmpkg_t *info, pmdbinfrq_t inforeq)
FILE *fp = NULL;
char path[PATH_MAX];
char line[513];
+ int sline = sizeof(line)-1;
char *pkgpath = NULL;
ALPM_LOG_FUNC;
@@ -418,7 +419,7 @@ int _alpm_db_read(pmdb_t *db, pmpkg_t *info, pmdbinfrq_t inforeq)
info->name, inforeq);
/* clear out 'line', to be certain - and to make valgrind happy */
- memset(line, 0, 513);
+ memset(line, 0, sline+1);
pkgpath = get_pkgpath(db, info);
@@ -442,7 +443,7 @@ int _alpm_db_read(pmdb_t *db, pmpkg_t *info, pmdbinfrq_t inforeq)
}
_alpm_strtrim(line);
if(strcmp(line, "%NAME%") == 0) {
- if(fgets(line, 512, fp) == NULL) {
+ if(fgets(line, sline, fp) == NULL) {
goto error;
}
if(strcmp(_alpm_strtrim(line), info->name) != 0) {
@@ -450,7 +451,7 @@ int _alpm_db_read(pmdb_t *db, pmpkg_t *info, pmdbinfrq_t inforeq)
"mismatch on package %s\n"), db->treename, info->name);
}
} else if(strcmp(line, "%VERSION%") == 0) {
- if(fgets(line, 512, fp) == NULL) {
+ if(fgets(line, sline, fp) == NULL) {
goto error;
}
if(strcmp(_alpm_strtrim(line), info->version) != 0) {
@@ -458,39 +459,39 @@ int _alpm_db_read(pmdb_t *db, pmpkg_t *info, pmdbinfrq_t inforeq)
"mismatch on package %s\n"), db->treename, info->name);
}
} else if(strcmp(line, "%FILENAME%") == 0) {
- if(fgets(line, 512, fp) == NULL) {
+ if(fgets(line, sline, fp) == NULL) {
goto error;
}
STRDUP(info->filename, _alpm_strtrim(line), goto error);
} else if(strcmp(line, "%DESC%") == 0) {
- if(fgets(line, 512, fp) == NULL) {
+ if(fgets(line, sline, fp) == NULL) {
goto error;
}
STRDUP(info->desc, _alpm_strtrim(line), goto error);
} else if(strcmp(line, "%GROUPS%") == 0) {
- while(fgets(line, 512, fp) && strlen(_alpm_strtrim(line))) {
+ while(fgets(line, sline, fp) && strlen(_alpm_strtrim(line))) {
char *linedup;
STRDUP(linedup, _alpm_strtrim(line), goto error);
info->groups = alpm_list_add(info->groups, linedup);
}
} else if(strcmp(line, "%URL%") == 0) {
- if(fgets(line, 512, fp) == NULL) {
+ if(fgets(line, sline, fp) == NULL) {
goto error;
}
STRDUP(info->url, _alpm_strtrim(line), goto error);
} else if(strcmp(line, "%LICENSE%") == 0) {
- while(fgets(line, 512, fp) && strlen(_alpm_strtrim(line))) {
+ while(fgets(line, sline, fp) && strlen(_alpm_strtrim(line))) {
char *linedup;
STRDUP(linedup, _alpm_strtrim(line), goto error);
info->licenses = alpm_list_add(info->licenses, linedup);
}
} else if(strcmp(line, "%ARCH%") == 0) {
- if(fgets(line, 512, fp) == NULL) {
+ if(fgets(line, sline, fp) == NULL) {
goto error;
}
STRDUP(info->arch, _alpm_strtrim(line), goto error);
} else if(strcmp(line, "%BUILDDATE%") == 0) {
- if(fgets(line, 512, fp) == NULL) {
+ if(fgets(line, sline, fp) == NULL) {
goto error;
}
_alpm_strtrim(line);
@@ -506,7 +507,7 @@ int _alpm_db_read(pmdb_t *db, pmpkg_t *info, pmdbinfrq_t inforeq)
info->builddate = atol(line);
}
} else if(strcmp(line, "%INSTALLDATE%") == 0) {
- if(fgets(line, 512, fp) == NULL) {
+ if(fgets(line, sline, fp) == NULL) {
goto error;
}
_alpm_strtrim(line);
@@ -522,12 +523,12 @@ int _alpm_db_read(pmdb_t *db, pmpkg_t *info, pmdbinfrq_t inforeq)
info->installdate = atol(line);
}
} else if(strcmp(line, "%PACKAGER%") == 0) {
- if(fgets(line, 512, fp) == NULL) {
+ if(fgets(line, sline, fp) == NULL) {
goto error;
}
STRDUP(info->packager, _alpm_strtrim(line), goto error);
} else if(strcmp(line, "%REASON%") == 0) {
- if(fgets(line, 512, fp) == NULL) {
+ if(fgets(line, sline, fp) == NULL) {
goto error;
}
info->reason = (pmpkgreason_t)atol(_alpm_strtrim(line));
@@ -537,7 +538,7 @@ int _alpm_db_read(pmdb_t *db, pmpkg_t *info, pmdbinfrq_t inforeq)
* is currently only used in sync databases, and SIZE is
* only used in local databases.
*/
- if(fgets(line, 512, fp) == NULL) {
+ if(fgets(line, sline, fp) == NULL) {
goto error;
}
info->size = atol(_alpm_strtrim(line));
@@ -548,19 +549,19 @@ int _alpm_db_read(pmdb_t *db, pmpkg_t *info, pmdbinfrq_t inforeq)
} else if(strcmp(line, "%ISIZE%") == 0) {
/* ISIZE (installed size) tag only appears in sync repositories,
* not the local one. */
- if(fgets(line, 512, fp) == NULL) {
+ if(fgets(line, sline, fp) == NULL) {
goto error;
}
info->isize = atol(_alpm_strtrim(line));
} else if(strcmp(line, "%MD5SUM%") == 0) {
/* MD5SUM tag only appears in sync repositories,
* not the local one. */
- if(fgets(line, 512, fp) == NULL) {
+ if(fgets(line, sline, fp) == NULL) {
goto error;
}
STRDUP(info->md5sum, _alpm_strtrim(line), goto error);
} else if(strcmp(line, "%REPLACES%") == 0) {
- while(fgets(line, 512, fp) && strlen(_alpm_strtrim(line))) {
+ while(fgets(line, sline, fp) && strlen(_alpm_strtrim(line))) {
char *linedup;
STRDUP(linedup, _alpm_strtrim(line), goto error);
info->replaces = alpm_list_add(info->replaces, linedup);
@@ -583,13 +584,13 @@ int _alpm_db_read(pmdb_t *db, pmpkg_t *info, pmdbinfrq_t inforeq)
while(fgets(line, 256, fp)) {
_alpm_strtrim(line);
if(strcmp(line, "%FILES%") == 0) {
- while(fgets(line, 512, fp) && strlen(_alpm_strtrim(line))) {
+ while(fgets(line, sline, fp) && strlen(_alpm_strtrim(line))) {
char *linedup;
STRDUP(linedup, _alpm_strtrim(line), goto error);
info->files = alpm_list_add(info->files, linedup);
}
} else if(strcmp(line, "%BACKUP%") == 0) {
- while(fgets(line, 512, fp) && strlen(_alpm_strtrim(line))) {
+ while(fgets(line, sline, fp) && strlen(_alpm_strtrim(line))) {
char *linedup;
STRDUP(linedup, _alpm_strtrim(line), goto error);
info->backup = alpm_list_add(info->backup, linedup);
@@ -611,24 +612,24 @@ int _alpm_db_read(pmdb_t *db, pmpkg_t *info, pmdbinfrq_t inforeq)
fgets(line, 255, fp);
_alpm_strtrim(line);
if(strcmp(line, "%DEPENDS%") == 0) {
- while(fgets(line, 512, fp) && strlen(_alpm_strtrim(line))) {
+ while(fgets(line, sline, fp) && strlen(_alpm_strtrim(line))) {
pmdepend_t *dep = _alpm_splitdep(_alpm_strtrim(line));
info->depends = alpm_list_add(info->depends, dep);
}
} else if(strcmp(line, "%OPTDEPENDS%") == 0) {
- while(fgets(line, 512, fp) && strlen(_alpm_strtrim(line))) {
+ while(fgets(line, sline, fp) && strlen(_alpm_strtrim(line))) {
char *linedup;
STRDUP(linedup, _alpm_strtrim(line), goto error);
info->optdepends = alpm_list_add(info->optdepends, linedup);
}
} else if(strcmp(line, "%CONFLICTS%") == 0) {
- while(fgets(line, 512, fp) && strlen(_alpm_strtrim(line))) {
+ while(fgets(line, sline, fp) && strlen(_alpm_strtrim(line))) {
char *linedup;
STRDUP(linedup, _alpm_strtrim(line), goto error);
info->conflicts = alpm_list_add(info->conflicts, linedup);
}
} else if(strcmp(line, "%PROVIDES%") == 0) {
- while(fgets(line, 512, fp) && strlen(_alpm_strtrim(line))) {
+ while(fgets(line, sline, fp) && strlen(_alpm_strtrim(line))) {
char *linedup;
STRDUP(linedup, _alpm_strtrim(line), goto error);
info->provides = alpm_list_add(info->provides, linedup);
@@ -647,7 +648,7 @@ int _alpm_db_read(pmdb_t *db, pmpkg_t *info, pmdbinfrq_t inforeq)
fgets(line, 255, fp);
_alpm_strtrim(line);
if(strcmp(line, "%DELTAS%") == 0) {
- while(fgets(line, 512, fp) && strlen(_alpm_strtrim(line))) {
+ while(fgets(line, sline, fp) && strlen(_alpm_strtrim(line))) {
pmdelta_t *delta = _alpm_delta_parse(line);
if(delta) {
info->deltas = alpm_list_add(info->deltas, delta);
diff --git a/lib/libalpm/trans.c b/lib/libalpm/trans.c
index 65bd464..aea71db 100644
--- a/lib/libalpm/trans.c
+++ b/lib/libalpm/trans.c
@@ -320,7 +320,8 @@ static int grep(const char *fn, const char *needle)
}
while(!feof(fp)) {
char line[1025];
- fgets(line, 1024, fp);
+ int sline = sizeof(line)-1;
+ fgets(line, sline, fp);
if(feof(fp)) {
continue;
}
diff --git a/src/pacman/util.c b/src/pacman/util.c
index 0e5e7f5..1143bef 100644
--- a/src/pacman/util.c
+++ b/src/pacman/util.c
@@ -580,6 +580,7 @@ void display_optdepends(pmpkg_t *pkg)
static int question(short preset, char *fmt, va_list args)
{
char response[33];
+ int sresponse = sizeof(response)-1;
FILE *stream;
if(config->noconfirm) {
@@ -602,7 +603,7 @@ static int question(short preset, char *fmt, va_list args)
return(preset);
}
- if(fgets(response, 32, stdin)) {
+ if(fgets(response, sresponse, stdin)) {
strtrim(response);
if(strlen(response) == 0) {
return(preset);
--
1.6.4.4
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