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author | 2024-01-24 21:25:39 -0500 | |
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committer | 2024-01-24 21:25:39 -0500 | |
commit | 76055a7dd0ab434e00df33b3577542bb69172aa8 (patch) | |
tree | e9938bd3c1b579377280d5cdce2bf1a261a63e71 | |
parent | pspax: fix error handling when reading attr or ipaddr fail (diff) | |
download | pax-utils-76055a7dd0ab434e00df33b3577542bb69172aa8.tar.gz pax-utils-76055a7dd0ab434e00df33b3577542bb69172aa8.tar.bz2 pax-utils-76055a7dd0ab434e00df33b3577542bb69172aa8.zip |
pspax: switch from fgets to getline
This avoids limiting buffers to BUFSIZ which is a stdio.h define for
stdio buffers, not for random files, and is not a guaranteed size.
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
-rw-r--r-- | pspax.c | 35 |
1 files changed, 20 insertions, 15 deletions
@@ -119,12 +119,13 @@ static const char *get_proc_name(int pfd) static int get_proc_maps(int pfd) { FILE *fp; - static char str[BUFSIZ]; + static char *str = NULL; + static size_t len = 0; if ((fp = fopenat_r(pfd, "maps")) == NULL) return -1; - while (fgets(str, sizeof(str), fp)) { + while (getline(&str, &len, fp) != -1) { char *p; if ((p = strchr(str, ' ')) != NULL) { if (strlen(p) < 6) @@ -155,12 +156,13 @@ static int get_proc_maps(int pfd) static int print_executable_mappings(int pfd) { FILE *fp; - static char str[BUFSIZ]; + static char *str = NULL; + static size_t len = 0; if ((fp = fopenat_r(pfd, "maps")) == NULL) return -1; - while (fgets(str, sizeof(str), fp)) { + while (getline(&str, &len, fp) != -1) { char *p; if ((p = strchr(str, ' ')) != NULL) { if (strlen(p) < 6) @@ -200,20 +202,21 @@ static const struct passwd *get_proc_passwd(int pfd) static const char *get_proc_status(int pfd, const char *name) { FILE *fp; - size_t len; - static char str[BUFSIZ]; + size_t name_len; + static char *str = NULL; + static size_t len = 0; if ((fp = fopenat_r(pfd, "status")) == NULL) return NULL; - len = strlen(name); - while (fgets(str, sizeof(str), fp)) { - if (strncasecmp(str, name, len) != 0) + name_len = strlen(name); + while (getline(&str, &len, fp) != -1) { + if (strncasecmp(str, name, name_len) != 0) continue; - if (str[len] == ':') { + if (str[name_len] == ':') { fclose(fp); str[strlen(str) - 1] = 0; - return (str + len + 2); + return (str + name_len + 2); } } fclose(fp); @@ -225,12 +228,13 @@ static const char *get_pid_attr(int pfd) { FILE *fp; char *p; - static char buf[BUFSIZ]; + static char *buf = NULL; + static size_t len = 0; if ((fp = fopenat_r(pfd, "attr/current")) == NULL) return NULL; - if (fgets(buf, sizeof(buf), fp) == NULL) { + if (getline(&buf, &len, fp) == -1) { fclose(fp); return NULL; } @@ -247,12 +251,13 @@ static const char *get_pid_addr(int pfd) { FILE *fp; char *p; - static char buf[BUFSIZ]; + static char *buf = NULL; + static size_t len = 0; if ((fp = fopenat_r(pfd, "ipaddr")) == NULL) return NULL; - if (fgets(buf, sizeof(buf), fp) == NULL) { + if (getline(&buf, &len, fp) == -1) { fclose(fp); return NULL; } |