Date: Sat, 20 Apr 2013 08:02:44 +0000 (UTC) From: Mikolaj Golub <trociny@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r249676 - head/lib/libprocstat Message-ID: <201304200802.r3K82iPO004517@svn.freebsd.org>
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Author: trociny Date: Sat Apr 20 08:02:43 2013 New Revision: 249676 URL: http://svnweb.freebsd.org/changeset/base/249676 Log: Add procstat_getpathname function to retrieve a process executable. MFC after: 1 month Modified: head/lib/libprocstat/Symbol.map head/lib/libprocstat/libprocstat.3 head/lib/libprocstat/libprocstat.c head/lib/libprocstat/libprocstat.h Modified: head/lib/libprocstat/Symbol.map ============================================================================== --- head/lib/libprocstat/Symbol.map Sat Apr 20 08:01:00 2013 (r249675) +++ head/lib/libprocstat/Symbol.map Sat Apr 20 08:02:43 2013 (r249676) @@ -20,6 +20,7 @@ FBSD_1.3 { procstat_freevmmap; procstat_get_shm_info; procstat_getgroups; + procstat_getpathname; procstat_getrlimit; procstat_getumask; procstat_getvmmap; Modified: head/lib/libprocstat/libprocstat.3 ============================================================================== --- head/lib/libprocstat/libprocstat.3 Sat Apr 20 08:01:00 2013 (r249675) +++ head/lib/libprocstat/libprocstat.3 Sat Apr 20 08:02:43 2013 (r249676) @@ -34,6 +34,7 @@ .Nm procstat_close , .Nm procstat_getfiles , .Nm procstat_getgroups , +.Nm procstat_getpathname , .Nm procstat_getprocs , .Nm procstat_getumask , .Nm procstat_getvmmap , @@ -128,6 +129,13 @@ .Fa "unsigned int *count" .Fc .Ft "int" +.Fo procstat_getpathname +.Fa "struct procstat *procstat" +.Fa "struct kinfo_proc *kp" +.Fa "char *pathname" +.Fa "size_t maxlen" +.Fc +.Ft "int" .Fo procstat_getrlimit .Fa "struct procstat *procstat" .Fa "struct kinfo_proc *kp" @@ -268,6 +276,18 @@ The caller is responsible to free the al function call. .Pp The +.Fn procstat_getpathname +function gets a pointer to the +.Vt procstat +structure, a pointer to +.Vt kinfo_proc +structure, and copies the path of the process executable to +.Fa pathname +buffer, limiting to +.Fa maxlen +characters. +.Pp +The .Fn procstat_getrlimit function gets a pointer to the .Vt procstat Modified: head/lib/libprocstat/libprocstat.c ============================================================================== --- head/lib/libprocstat/libprocstat.c Sat Apr 20 08:01:00 2013 (r249675) +++ head/lib/libprocstat/libprocstat.c Sat Apr 20 08:02:43 2013 (r249676) @@ -136,6 +136,10 @@ static int procstat_get_vnode_info_sysct static gid_t *procstat_getgroups_core(struct procstat_core *core, unsigned int *count); static gid_t *procstat_getgroups_sysctl(pid_t pid, unsigned int *count); +static int procstat_getpathname_core(struct procstat_core *core, + char *pathname, size_t maxlen); +static int procstat_getpathname_sysctl(pid_t pid, char *pathname, + size_t maxlen); static int procstat_getrlimit_core(struct procstat_core *core, int which, struct rlimit* rlimit); static int procstat_getrlimit_sysctl(pid_t pid, int which, @@ -1780,3 +1784,64 @@ procstat_getrlimit(struct procstat *proc return (-1); } } + +static int +procstat_getpathname_sysctl(pid_t pid, char *pathname, size_t maxlen) +{ + int error, name[4]; + size_t len; + + name[0] = CTL_KERN; + name[1] = KERN_PROC; + name[2] = KERN_PROC_PATHNAME; + name[3] = pid; + len = maxlen; + error = sysctl(name, 4, pathname, &len, NULL, 0); + if (error != 0 && errno != ESRCH) + warn("sysctl: kern.proc.pathname: %d", pid); + if (len == 0) + pathname[0] = '\0'; + return (error); +} + +static int +procstat_getpathname_core(struct procstat_core *core, char *pathname, + size_t maxlen) +{ + struct kinfo_file *files; + int cnt, i, result; + + files = kinfo_getfile_core(core, &cnt); + if (files == NULL) + return (-1); + result = -1; + for (i = 0; i < cnt; i++) { + if (files[i].kf_fd != KF_FD_TYPE_TEXT) + continue; + strncpy(pathname, files[i].kf_path, maxlen); + result = 0; + break; + } + free(files); + return (result); +} + +int +procstat_getpathname(struct procstat *procstat, struct kinfo_proc *kp, + char *pathname, size_t maxlen) +{ + switch(procstat->type) { + case PROCSTAT_KVM: + warnx("kvm method is not supported"); + return (-1); + case PROCSTAT_SYSCTL: + return (procstat_getpathname_sysctl(kp->ki_pid, pathname, + maxlen)); + case PROCSTAT_CORE: + return (procstat_getpathname_core(procstat->core, pathname, + maxlen)); + default: + warnx("unknown access method: %d", procstat->type); + return (-1); + } +} Modified: head/lib/libprocstat/libprocstat.h ============================================================================== --- head/lib/libprocstat/libprocstat.h Sat Apr 20 08:01:00 2013 (r249675) +++ head/lib/libprocstat/libprocstat.h Sat Apr 20 08:02:43 2013 (r249676) @@ -169,10 +169,12 @@ int procstat_get_vnode_info(struct procs struct vnstat *vn, char *errbuf); gid_t *procstat_getgroups(struct procstat *procstat, struct kinfo_proc *kp, unsigned int *count); -int procstat_getumask(struct procstat *procstat, struct kinfo_proc *kp, - unsigned short* umask); +int procstat_getpathname(struct procstat *procstat, struct kinfo_proc *kp, + char *pathname, size_t maxlen); int procstat_getrlimit(struct procstat *procstat, struct kinfo_proc *kp, int which, struct rlimit* rlimit); +int procstat_getumask(struct procstat *procstat, struct kinfo_proc *kp, + unsigned short* umask); struct kinfo_vmentry *procstat_getvmmap(struct procstat *procstat, struct kinfo_proc *kp, unsigned int *count); struct procstat *procstat_open_core(const char *filename);
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